Probio Refill
60 Vegan capsules per bottle
Digestion
Gut Health
Immunity
Antibiotic Recovery
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Full Spectrum Pre + ProBiotic
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6 scientifically validated bacterial strains
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PreBiotic support with 40mg FOS
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Acid-resistant, DRcaps® delivery to help probiotics survive stomach acid
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Vegan friendly, flexible daily dosage
We stand by our science — enjoy 90 days risk-free. Read more
Nutritional Information
1 capsule typically provides:
Fructooligosaccarides (FOS) - 40mg
Active Live Culture Blend - 10 Billion CFU
including:
Bifidobacterium lactis
Bifidobacterium bifidum
Bifidobacterium longum
Lactobacillus acidophilus
Lactobacillus casei rhamnosus
Streptococcus thermophilus
Ingredients:
Bulking Agent: Brown Rice Flour, Capsule Shell: (Hydroxypropyl Methylcellulose, Gellan Gum), Active Live Culture Blend: (Bifidobacterium longum, Bifidobacterium bifidum, Lactobacillus acidophilus, Streptococcus thermophilus, Lactobacillus casei rhamnosus, Bifidobacterium animalis lactis), Chicory Inulin (Fructo Oligosaccharides), Anti-Caking Agent: Magnesium Stearate.
Allergens:
Although rigorous precautions are taken to prevent any cross-contamination, this product is manufactured in a facility that handles allergy-based materials.
Disclaimer:
Always consult your health practitioner before taking nutritional supplements if you are taking medication or are under medical supervision. You should not take supplements as a substitute for a varied balanced diet. Store in a cool dry place, out of sunlight and out of reach of children. Do not exceed stated dose.
How to Use
Take 1–2 capsules once or twice daily on an empty stomach with water. Avoid swallowing the capsules with hot drinks, as heat can affect the live cultures.
Do not exceed the recommended daily dose. Store in a cool, dry place, away from sunlight and out of reach of children. If you are taking medication or have health concerns, please consult your healthcare practitioner before use.
- Take probiotics on an empty stomach for best absorption.
- Stay hydrated throughout the day to support digestion.
- Maintain a balanced diet rich in fiber to nourish your gut bacteria.
- Avoid excessive alcohol and highly processed foods, which can disrupt gut health.
- Consistency is key—try to take your probiotics daily for optimal effect.
Shipping
We ship with all major carriers, including PostNord, DAO, GLS, and Bring, offering 1–2 business day delivery.
Orders are prepared and sent out within 24–48 hours.
Cost varies between DKK 39-52.00
Free Delivery on orders above DKK 500
*The delivery days count from the moment the carrier has received our package.
We also deliver throughout Europe using trusted partners like GLS and EcoParcel.
Delivery times vary by destination, between 4-15 business days, but we always send out our packages within 48 hours of receiving your order.
Cost varies by destination between €9-25.
Free Delivery on orders above €60.
*The delivery days count from the moment the carrier has received our package.
We currently do not ship outside of the European Union, however if you would like to place a order, contact us at hello@persona-path.com and we will try to assist you.
Transparency & Sourcing
At PersonaPath, we believe in full transparency and doing things the right way—from how we formulate our supplements to how we treat the planet.
Our mission is to help people live healthier, more balanced lives, while respecting the world we all share.
Our products are manufactured in the UK, Germany, Slovenia and Latvia under strict quality standards and then packaged and prepared locally in Denmark, where we work closely with Fødevarestyrelsen (Danish Veterinary and Food Administration) to ensure everything meets national safety and labelling requirements.
We work exclusively with a BRC AA–certified manufacturer that follows Good Manufacturing Practices (GMP) and full traceability, from raw ingredients to finished product. All of our formulations are developed by a qualified nutritionist and are based strictly on EFSA-approved claims—with no inflated promises, ever.
We're also proud to take an ethical and sustainable approach. We never work with suppliers who test on animals or use harmful harvesting methods.
Sustainability is not a side project—it’s core to how we operate.
✔ All of our packaging is made from biodegradable materials, durable glass or recycled plastic
✔ We offset our shipping-related CO₂ emissions
✔ We’re partnered with Greenspark, supporting projects like:
– Reforestation
– Ocean plastic cleanup
– Carbon removal & kelp planting
– Fresh water access in vulnerable areas
– Supporting honeybee populations
We are proud to offer clean, honest supplements—made with care, backed by science, and delivered with respect for your health and the planet.
Our products are manufactured in the UK, Germany, Slovenia, and Latvia under strict quality standards, then packaged and prepared locally in Denmark.
We’ve also built a transparent ingredient section on our website, where you can explore every detail of what goes into our products — including the exact type of raw material, EFSA-approved health claims, ingredient origin, and documented benefits.
Supporting ingredients are also fully listed and explained — what they are, what they do, and why we include them. You can find this information under Ingredients → Supporting Ingredients, or directly on each product page by clicking on “Ingredients.”
Finally, our packaging materials are sourced from Germany, Poland, the UK, and Denmark, all produced to meet the highest European standards of safety and sustainability.
Giving Back Together
We’ve partnered with Greenspark to give back where it’s needed most — supporting meaningful environmental and social causes around the world. Each month, we dedicate a portion of our monthly revenue to a new project that creates real impact, from restoring forests and protecting marine ecosystems to supporting local communities.
You can always see the current month’s cause featured at the top of our website or on our social media channels. At the end of each month, we share full transparency — including donation receipts, details about the partner organization, and photos from the project locations — so you can see exactly where your support goes.
We’re proud that our community plays an active role in helping us make a difference. Every purchase contributes to something bigger — together, we’re building a healthier planet and a better future.
The Persona
Promise
Discover what makes us different and why our customers trust us.
At Persona we don't use marketing claims.
Every health benefit you see is approved by european authorities and backed by science.
It's how we build trust.
Learn more about Probio RefillYour body hosts a community of bacteria, both good and bad. Stress, diet, and lifestyle can sometimes shift this balance, which is why many people choose probiotics as part of their daily wellness routine. This complex brings together six carefully selected live bacterial strains in a convenient, easy-to-take capsule.
Many probiotics don’t make it to the gut alive. That’s why we use acid-resistant, delayed-release capsule — helping them pass through the stomach and arrive further into the digestive tract.
- Delayed-release capsule shell helps protect against stomach acidity.
- Simple 1–4 capsule daily dosage flexibility.
This blend also includes fructooligosaccharides (FOS), a natural plant-derived fibre from chicory root. FOS serves as the nutrient to feed the friendly bacteria within the gut to help them strive and reach their full benefit.
- Contains FOS (from chicory inulin) alongside probiotics.
- A thoughtful combination of live cultures and plant fibre.
- Dairy-free and allergen-conscious production.
Understanding Bioavailability
Why the form of a vitamin matters as much as the vitamin itself
The Restaurant Example
Imagine ordering salmon at a restaurant. The menu says "salmon", but what arrives could be perfectly grilled, raw, or still wrapped in plastic. Technically all salmon, but only one is actually nourishing.
Vitamins work the same way. A label might say "Vitamin C 1000 mg," but that vitamin could be in a form your body barely absorbs, or one it uses efficiently. The form determines whether your body can actually use what you're taking.
What Is Bioavailability?
Bioavailability is the amount of a nutrient that actually enters your bloodstream and reaches your cells.
If you take 100 mg of a vitamin but only 20 mg gets absorbed, the bioavailability is 20%. The rest passes through unused.
What affects bioavailability:
- The chemical form of the vitamin
- Your individual gut health and genetics
- What you eat alongside the supplement
Common Vitamin Forms Explained
Methylated Vitamins (Active Forms)
Some people struggle to convert standard vitamins into their active, usable forms due to genetic variations. Methylated vitamins skip that step; they're already active.
Example: Methylcobalamin (B12) vs Cyanocobalamin
- Methylcobalamin Active form, immediately usable
- Cyanocobalamin Synthetic, requires conversion (which 40-60% of people struggle with due to MTHFR gene variants)
Common forms: Methylfolate (5-MTHF), methylcobalamin (B12), P-5-P (B6)
Natural vs Synthetic
"Natural" doesn't automatically mean better; it depends on the specific vitamin.
Example: Vitamin E
- Natural (d-alpha-tocopherol): Derived from plants, more biologically active
- Synthetic (dl-alpha-tocopherol): Contains 8 forms, only one your body prefers
Example: Vitamin C
- Ascorbic acid (synthetic) is molecularly identical to natural vitamin C and equally effective
- Liposomal vitamin C: Wrapped in fat bubbles for enhanced absorption and higher blood levels
Fat-Soluble vs Water-Soluble
Fat-soluble vitamins (A, D, E, K) need fat to be absorbed. Taking them with food containing healthy fats significantly improves uptake.
Water-soluble vitamins (B, C) dissolve in water and are absorbed more easily, but excess is excreted quickly, making sustained-release forms sometimes beneficial.
What "Bioavailable" Actually Means on a Label
When we say "bioavailable form," we mean:
- Active forms that don't require conversion (methylated B vitamins)
- Forms with proven absorption backed by scientific research
- Enhanced delivery systems (like liposomal technology)
What it shouldn't mean: vague marketing language without specifics.
Red flags to watch for:
- No specific form listed (just "Vitamin B12" without the type)
- "Proprietary blends" that hide ingredient amounts
- Claims without any absorption data
The Bottom Line
A cheaper supplement with poor bioavailability isn't a bargain. The best supplements aren't about taking more; they're about absorbing what you take.
What to look for:
- Specific forms clearly listed on the label
- Science-backed forms (methylated, chelated, liposomal)
- Transparency about dosages and sources
At Persona, we choose forms based on scientific evidence for absorption, not what's cheapest to manufacture. Because if your body can't use it, what's the point?
References: EFSA scientific opinions on bioavailability; NIH Office of Dietary Supplements; peer-reviewed studies on vitamin absorption and forms (available upon request).
Chosen for their ability to improve gut function and build whole body health.
Strains that work harder for your whole body
10 billion CFU per capsule
Combined to a total of 40 billion CFU per daily dose
6 Diverse Probiotic Strains
Research-derived doses for microbial diversity, the foundation of a healthy gut.
PreBiotic Support
40mg FOS to feed and nourish the friendly bacteria.
DRcaps® Delivery
Acid-resistant, delayed-release capsule technology to help probiotics survive stomach acid, so they reach the digestive tract alive.
More than just Supplements
Bioavailable Nutrients
How to Use:
- Take 1-2 capsules, once or twice a day on an empty stomach with water (1-4 caps day).
The Benefits of FOS
Prebiotic fiber
Fructooligosaccharides (FOS) are a type of prebiotic fiber that functions primarily by nourishing beneficial gut bacteria, such as Bifidobacterium and Lactobacillus. As a non-digestible carbohydrate, FOS passes through the small intestine intact and is fermented by microorganisms in the colon.
Key Highlights
- A natural prebiotic fibre that feeds beneficial gut bacteria
- Selectively promotes growth of Bifidobacteria and Lactobacilli
- Supports mineral absorption, particularly calcium and magnesium
- Found naturally in foods like onions, garlic, and bananas
Biochemistry Timeline
FOS passes through the stomach and small intestine undigested, arriving in the colon where it is selectively fermented by beneficial bacteria. This fermentation produces short-chain fatty acids that nourish the gut lining and lower intestinal pH, creating conditions that favour beneficial organisms. Changes in gut bacteria populations are measurable within 1 to 2 weeks of regular intake.
Summary
Fructooligosaccharides (FOS) are natural prebiotic fibres that serve as fuel for the beneficial bacteria in your gut. By selectively feeding Bifidobacteria and Lactobacilli, FOS helps these populations grow and thrive. This makes FOS an ideal companion to probiotic supplements, supporting a healthy and balanced microbiome from the inside.
FAQs
What is the difference between FOS and inulin?
Both are prebiotic fibres from the fructan family. FOS has shorter chain lengths than inulin, which means it is fermented more rapidly in the colon. Many formulations use both for complementary benefits.
Can FOS cause bloating?
Some people may experience mild gas or bloating when first introducing FOS, as gut bacteria adjust. Starting with a lower dose and increasing gradually usually prevents discomfort.
Research
Priyadarshini M, Jorgensen J, Stauffer SRC et al. (2026). A high fermentable fiber Western diet reduces indole levels. bioRxiv. https://pubmed.ncbi.nlm.nih.gov/41659626/
Kong Y, Cao P, Wu J et al. (2026). Prebiotics as adjunctive treatment ameliorates DSS-induced colitis and gut microbiota. Microbiol Spectr. https://pubmed.ncbi.nlm.nih.gov/41363846/
Ma Y, Luo H, Chen J et al. (2026). Lactobacillus rhamnosus and Xylo-oligosaccharides improve meat quality and modulate the microbiota composition of Magang geese aged 22-50 days. Poult Sci. https://pubmed.ncbi.nlm.nih.gov/41265136/
Arioz Tunc H, Calder PC, Cait A et al. (2026). Impact of non-digestible carbohydrates and prebiotics on immunity, infections, inflammation and vaccine responses: a systematic review of evidence in healthy humans and a discussion of mechanistic proposals. Crit Rev Food Sci Nutr. https://pubmed.ncbi.nlm.nih.gov/40516031/
Verstegen REM, Zuurveld M, Thijssen S et al. (2025). A Specific Ratio of Dietary Short-Chain and Long-Chain Fructo-Oligosaccharides Shifts the Immune Response Away from Type 2 in a Murine Model for House Dust Mite-Induced Asthma. Nutrients. https://pubmed.ncbi.nlm.nih.gov/41305571/
Triva F, Borghi E, Marsiglia MD et al. (2025). Targeting the gut to improve seizure control in CDKL5 deficiency disorder (CDD): study protocol for a single-arm, open-label clinical trial. Front Neurol. https://pubmed.ncbi.nlm.nih.gov/41230376/
Arumugam B, Deotale S, Chakravarty I et al. (2025). Enzyme Treated Sapota Seed Dietary Fibre Is a Novel Prebiotic Feed Additive: In Vitro Studies. Biotechnol Appl Biochem. https://pubmed.ncbi.nlm.nih.gov/41178122/
Yap BJM, Yeo SK, Ng WK et al. (2025). Fructooligosaccharides and immune health: immunomodulatory effects via gut microbiota and direct molecular mechanisms. Int J Food Sci Nutr [Review]. https://pubmed.ncbi.nlm.nih.gov/41053937/
Ruangpanit Y, Rassmidatta K, Philatha A et al. (2025). Effects of fructooligosaccharide administration routes on growth performance, gut integrity, microbiota, and meat quality in broiler chickens exposed to reused litter. Poult Sci. https://pubmed.ncbi.nlm.nih.gov/41027278/
McCullough F, Cheung J, Miller LJ (2025). A Systematic Review Evaluating the Impact of Fibre Supplementation on Gut Health and Other Clinical Outcomes in Adults with Haematological Malignancies During Haematopoietic Stem Cell Transplantation. Nutrients. https://pubmed.ncbi.nlm.nih.gov/41010499/
Xue RY, Zhang YS, Xi JF et al. (2025). Dietary prebiotics combined with iron supplementation: A two-pronged approach to reduce rice cadmium bioavailability. Food Chem Toxicol. https://pubmed.ncbi.nlm.nih.gov/40976360/
Adedigba P, Ice JA, Alake SE et al. (2025). Dietary Tart Cherry and Fructooligosaccharides Promote Bone Health via the Gut Microbiota and Increased Bone Formation. Nutrients. https://pubmed.ncbi.nlm.nih.gov/40944216/
Mo C, Zhou S, Du Z et al. (2025). Impact of fructooligosaccharides on gut microbiota composition and metabolite production: implications for childhood obesity. PeerJ. https://pubmed.ncbi.nlm.nih.gov/40895066/
Ekwudo MN, Masson B, Di Natale MR et al. (2025). Prebiotics improve motor function, cognition and gut health in a preclinical model of Huntington's disease. Brain Behav Immun. https://pubmed.ncbi.nlm.nih.gov/40803456/
Wong WY, Chan BD, Cho PT et al. (2025). A non-pharmacological intervention for insomnia: tryptophan-fructooligosaccharides combination improves sleep in mice via anti-inflammation and gut microbiota modulation. Food Funct. https://pubmed.ncbi.nlm.nih.gov/40772548/
Kim JH, Kim HR, Seong H et al. (2025). Makgeolli Lees as a Novel Prebiotic Candidate: Effects on Human Gut Microbiota and Metabolites. J Microbiol Biotechnol. https://pubmed.ncbi.nlm.nih.gov/40582765/
Li M, Zhang Q, Zhao W et al. (2025). Effects and Persistence of Bifidobacterium animalis subsp. lactis BL-99 and Fructooligosaccharides on Older Adults with Functional Constipation: A Randomized, Double-Blind, Placebo-Controlled Trial. J Nutr Health Aging. https://pubmed.ncbi.nlm.nih.gov/40499217/
Aryati Y, Farastuti E, Sholichah L et al. (2025). Effects of honey saccharide supplementation on growth performance, amylase enzyme activity, gut microvilli, and microbiome in Cyprinus carpio. Vet World. https://pubmed.ncbi.nlm.nih.gov/40041522/
Namted S, Chailaor P, Bunchasak C (2025). Effects of drinking water fructo-oligosaccharide supplementation on broiler chicken growth performance, blood glucose level, white blood cell count, carcass yield, meat quality, and cecal microbiota. Poult Sci. https://pubmed.ncbi.nlm.nih.gov/40024010/
Dhanasiri AKS, Li Y, Krogdahl Å et al. (2024). Longitudinal study on the effects of a synbiotic supplement to Atlantic salmon diets on performance, gut microbiota and immune responses during antibiotic treatment and subsequent recovery. Anim Microbiome. https://pubmed.ncbi.nlm.nih.gov/39707555/
20 studies — FOS
Priyadarshini M, Jorgensen J, Stauffer SRC et al. (2026). A high fermentable fiber Western diet reduces indole levels. bioRxiv. https://pubmed.ncbi.nlm.nih.gov/41659626/
Kong Y, Cao P, Wu J et al. (2026). Prebiotics as adjunctive treatment ameliorates DSS-induced colitis and gut microbiota. Microbiol Spectr. https://pubmed.ncbi.nlm.nih.gov/41363846/
Ma Y, Luo H, Chen J et al. (2026). Lactobacillus rhamnosus and Xylo-oligosaccharides improve meat quality and modulate the microbiota composition of Magang geese aged 22-50 days. Poult Sci. https://pubmed.ncbi.nlm.nih.gov/41265136/
Arioz Tunc H, Calder PC, Cait A et al. (2026). Impact of non-digestible carbohydrates and prebiotics on immunity, infections, inflammation and vaccine responses: a systematic review of evidence in healthy humans and a discussion of mechanistic proposals. Crit Rev Food Sci Nutr. https://pubmed.ncbi.nlm.nih.gov/40516031/
Verstegen REM, Zuurveld M, Thijssen S et al. (2025). A Specific Ratio of Dietary Short-Chain and Long-Chain Fructo-Oligosaccharides Shifts the Immune Response Away from Type 2 in a Murine Model for House Dust Mite-Induced Asthma. Nutrients. https://pubmed.ncbi.nlm.nih.gov/41305571/
Triva F, Borghi E, Marsiglia MD et al. (2025). Targeting the gut to improve seizure control in CDKL5 deficiency disorder (CDD): study protocol for a single-arm, open-label clinical trial. Front Neurol. https://pubmed.ncbi.nlm.nih.gov/41230376/
Arumugam B, Deotale S, Chakravarty I et al. (2025). Enzyme Treated Sapota Seed Dietary Fibre Is a Novel Prebiotic Feed Additive: In Vitro Studies. Biotechnol Appl Biochem. https://pubmed.ncbi.nlm.nih.gov/41178122/
Yap BJM, Yeo SK, Ng WK et al. (2025). Fructooligosaccharides and immune health: immunomodulatory effects via gut microbiota and direct molecular mechanisms. Int J Food Sci Nutr [Review]. https://pubmed.ncbi.nlm.nih.gov/41053937/
Ruangpanit Y, Rassmidatta K, Philatha A et al. (2025). Effects of fructooligosaccharide administration routes on growth performance, gut integrity, microbiota, and meat quality in broiler chickens exposed to reused litter. Poult Sci. https://pubmed.ncbi.nlm.nih.gov/41027278/
McCullough F, Cheung J, Miller LJ (2025). A Systematic Review Evaluating the Impact of Fibre Supplementation on Gut Health and Other Clinical Outcomes in Adults with Haematological Malignancies During Haematopoietic Stem Cell Transplantation. Nutrients. https://pubmed.ncbi.nlm.nih.gov/41010499/
Xue RY, Zhang YS, Xi JF et al. (2025). Dietary prebiotics combined with iron supplementation: A two-pronged approach to reduce rice cadmium bioavailability. Food Chem Toxicol. https://pubmed.ncbi.nlm.nih.gov/40976360/
Adedigba P, Ice JA, Alake SE et al. (2025). Dietary Tart Cherry and Fructooligosaccharides Promote Bone Health via the Gut Microbiota and Increased Bone Formation. Nutrients. https://pubmed.ncbi.nlm.nih.gov/40944216/
Mo C, Zhou S, Du Z et al. (2025). Impact of fructooligosaccharides on gut microbiota composition and metabolite production: implications for childhood obesity. PeerJ. https://pubmed.ncbi.nlm.nih.gov/40895066/
Ekwudo MN, Masson B, Di Natale MR et al. (2025). Prebiotics improve motor function, cognition and gut health in a preclinical model of Huntington's disease. Brain Behav Immun. https://pubmed.ncbi.nlm.nih.gov/40803456/
Wong WY, Chan BD, Cho PT et al. (2025). A non-pharmacological intervention for insomnia: tryptophan-fructooligosaccharides combination improves sleep in mice via anti-inflammation and gut microbiota modulation. Food Funct. https://pubmed.ncbi.nlm.nih.gov/40772548/
Kim JH, Kim HR, Seong H et al. (2025). Makgeolli Lees as a Novel Prebiotic Candidate: Effects on Human Gut Microbiota and Metabolites. J Microbiol Biotechnol. https://pubmed.ncbi.nlm.nih.gov/40582765/
Li M, Zhang Q, Zhao W et al. (2025). Effects and Persistence of Bifidobacterium animalis subsp. lactis BL-99 and Fructooligosaccharides on Older Adults with Functional Constipation: A Randomized, Double-Blind, Placebo-Controlled Trial. J Nutr Health Aging. https://pubmed.ncbi.nlm.nih.gov/40499217/
Aryati Y, Farastuti E, Sholichah L et al. (2025). Effects of honey saccharide supplementation on growth performance, amylase enzyme activity, gut microvilli, and microbiome in Cyprinus carpio. Vet World. https://pubmed.ncbi.nlm.nih.gov/40041522/
Namted S, Chailaor P, Bunchasak C (2025). Effects of drinking water fructo-oligosaccharide supplementation on broiler chicken growth performance, blood glucose level, white blood cell count, carcass yield, meat quality, and cecal microbiota. Poult Sci. https://pubmed.ncbi.nlm.nih.gov/40024010/
Dhanasiri AKS, Li Y, Krogdahl Å et al. (2024). Longitudinal study on the effects of a synbiotic supplement to Atlantic salmon diets on performance, gut microbiota and immune responses during antibiotic treatment and subsequent recovery. Anim Microbiome. https://pubmed.ncbi.nlm.nih.gov/39707555/
The Benefits of Bifidobacterium longum
Probiotic strain
Bifidobacterium longum is a "good" bacteria that resides in the human intestines and provides numerous health benefits. As with other probiotics, its specific effects are often strain-dependent. It helps maintain a healthy gut and also influences the immune system and mental health.
Key Highlights
- One of the most abundant species in the healthy adult gut
- Produces B vitamins and short-chain fatty acids
- Supports digestive balance and comfort
- Studied for its role in stress and mood support via the gut-brain axis
Biochemistry Timeline
Bifidobacterium longum colonises the large intestine and begins fermenting dietary fibres to produce short-chain fatty acids, particularly acetate. These acids nourish the gut lining and support a healthy intestinal environment. Some research suggests B. longum may also influence the gut-brain axis, with effects on stress responses observed over 4 to 8 weeks.
Summary
Bifidobacterium longum is a cornerstone species of the healthy gut microbiome. It is one of the most naturally abundant bifidobacteria in the human digestive tract and plays a role in fibre fermentation, vitamin production, and maintaining gut barrier integrity. Emerging research is also exploring its connection to the gut-brain axis.
FAQs
Why is B. longum considered important?
As one of the most naturally abundant species in the healthy human gut, B. longum plays a fundamental role in digestion, nutrient production, and maintaining a balanced microbiome.
Does B. longum help with stress?
Some clinical studies have found that specific strains of B. longum may support normal stress responses via the gut-brain axis, though this research is still in its early stages.
Research
Srivastava S et al. — Gut Microbes (2024). [RCT (double-blind)]. https://pubmed.ncbi.nlm.nih.gov/38630015/
Martin FP et al. — Gut Microbes (2024). [RCT analysis]. https://pubmed.ncbi.nlm.nih.gov/38717445/
Yu J et al. — Cell Host Microbe (2024). [Clinical + mechanistic]. https://pubmed.ncbi.nlm.nih.gov/38091982/
Boehme M et al. — Nutrients (2023). [RCT (double-blind)]. https://pubmed.ncbi.nlm.nih.gov/37513541/
Mills S et al. — Gut Microbes (2023). [Review]. https://pubmed.ncbi.nlm.nih.gov/36896934/
Hsu YC et al. — Nutrients (2023). [RCT]. https://pubmed.ncbi.nlm.nih.gov/38201846/
Shi S et al. — Nutrients (2022). [RCT]. https://pubmed.ncbi.nlm.nih.gov/36615708/
Kim CS et al. — J Gerontol A Biol Sci Med Sci (2021). [RCT (double-blind)]. https://pubmed.ncbi.nlm.nih.gov/32300799/
Yao S et al. — J Immunol Res (2021). [Review]. https://pubmed.ncbi.nlm.nih.gov/34337079/
Wang Y et al. — Pharmacol Res (2020). [Clinical trial]. https://pubmed.ncbi.nlm.nih.gov/32305492/
Strain characteristics — established (Established). [Microbiological].
Neonatal dominance — established (Established). [Microbiological].
12 studies — Bifidobacterium longum
Srivastava S et al. — Gut Microbes (2024). [RCT (double-blind)]. https://pubmed.ncbi.nlm.nih.gov/38630015/
Martin FP et al. — Gut Microbes (2024). [RCT analysis]. https://pubmed.ncbi.nlm.nih.gov/38717445/
Yu J et al. — Cell Host Microbe (2024). [Clinical + mechanistic]. https://pubmed.ncbi.nlm.nih.gov/38091982/
Boehme M et al. — Nutrients (2023). [RCT (double-blind)]. https://pubmed.ncbi.nlm.nih.gov/37513541/
Mills S et al. — Gut Microbes (2023). [Review]. https://pubmed.ncbi.nlm.nih.gov/36896934/
Hsu YC et al. — Nutrients (2023). [RCT]. https://pubmed.ncbi.nlm.nih.gov/38201846/
Shi S et al. — Nutrients (2022). [RCT]. https://pubmed.ncbi.nlm.nih.gov/36615708/
Kim CS et al. — J Gerontol A Biol Sci Med Sci (2021). [RCT (double-blind)]. https://pubmed.ncbi.nlm.nih.gov/32300799/
Yao S et al. — J Immunol Res (2021). [Review]. https://pubmed.ncbi.nlm.nih.gov/34337079/
Wang Y et al. — Pharmacol Res (2020). [Clinical trial]. https://pubmed.ncbi.nlm.nih.gov/32305492/
Strain characteristics — established (Established). [Microbiological].
Neonatal dominance — established (Established). [Microbiological].
The Benefits of Bifidobacterium lactis
Probiotic Strain
Bifidobacterium lactis is a probiotic bacterium with numerous beneficial functions in the human body, particularly for gut health and immune support.
Key Highlights
- Supports immune system function
- Enhances gut barrier integrity
- One of the most researched probiotic strains
- Improves digestive regularity
Biochemistry Timeline
Bifidobacterium lactis survives stomach acid well and reaches the intestine intact, where it begins colonising within days. It interacts with immune cells in the gut lining, contributing to immune modulation. Consistent intake over 2 to 4 weeks is typically needed to establish meaningful colonisation.
Summary
Bifidobacterium lactis is among the most widely studied probiotic strains in the world. It has demonstrated robust survival through stomach acid, strong colonisation abilities, and measurable effects on immune function and digestive regularity. It is a versatile, well-tolerated strain suitable for daily use.
FAQs
What makes B. lactis different from other probiotics?
B. lactis is known for its exceptional ability to survive digestive conditions and reach the gut alive. It is one of the most extensively researched strains, with studies supporting its role in immune function and gut health.
Is B. lactis safe for children?
B. lactis has been widely studied in infants and children and is generally considered safe. It is included in many infant formulas and paediatric probiotic products. Always consult your paediatrician.
Research
Cheng J et al. — JAMA Netw Open (2024). [RCT]. https://pubmed.ncbi.nlm.nih.gov/39356506/
Lai H et al. — Gut Microbes (2023). [Review]. https://pubmed.ncbi.nlm.nih.gov/37078654/
Lemoine A et al. — Nutrients (2023). [Review]. https://pubmed.ncbi.nlm.nih.gov/36904230/
Nocerino R et al. — Aliment Pharmacol Ther (2020). [RCT]. https://pubmed.ncbi.nlm.nih.gov/31797399/
Wang X et al. — Gut (2020). [Preclinical]. https://pubmed.ncbi.nlm.nih.gov/32241904/
Ibarra A et al. — Gut Microbes (2018). [RCT]. https://pubmed.ncbi.nlm.nih.gov/29227175/
Respiratory infection — RCTs (2018-2023). [Multiple RCTs].
Antibiotic recovery — clinical (2018-2024). [Clinical evidence].
Immune modulation — established (Established). [Microbiological].
BB-12 — most studied (Established). [Strain review].
HN019 immune enhancement — established (Established). [Multiple RCTs].
Constipation dose-response — established (Established). [Clinical evidence].
12 studies — Bifidobacterium lactis
Cheng J et al. — JAMA Netw Open (2024). [RCT]. https://pubmed.ncbi.nlm.nih.gov/39356506/
Lai H et al. — Gut Microbes (2023). [Review]. https://pubmed.ncbi.nlm.nih.gov/37078654/
Lemoine A et al. — Nutrients (2023). [Review]. https://pubmed.ncbi.nlm.nih.gov/36904230/
Nocerino R et al. — Aliment Pharmacol Ther (2020). [RCT]. https://pubmed.ncbi.nlm.nih.gov/31797399/
Wang X et al. — Gut (2020). [Preclinical]. https://pubmed.ncbi.nlm.nih.gov/32241904/
Ibarra A et al. — Gut Microbes (2018). [RCT]. https://pubmed.ncbi.nlm.nih.gov/29227175/
Respiratory infection — RCTs (2018-2023). [Multiple RCTs].
Antibiotic recovery — clinical (2018-2024). [Clinical evidence].
Immune modulation — established (Established). [Microbiological].
BB-12 — most studied (Established). [Strain review].
HN019 immune enhancement — established (Established). [Multiple RCTs].
Constipation dose-response — established (Established). [Clinical evidence].
The Benefits of Bifidobacterium bifidum
Probiotic Strain
Bifidobacterium bifidum is a type of "good" bacteria that resides in the intestines and contributes significantly to gut health, immune function, and digestion.
Key Highlights
- One of the first beneficial bacteria to colonise the infant gut
- Supports digestive comfort and gut barrier function
- Helps maintain a balanced intestinal microbiome
- Well-studied probiotic strain with a long history of safe use
Biochemistry Timeline
After ingestion, Bifidobacterium bifidum reaches the large intestine where it colonises and begins producing short-chain fatty acids and lactic acid. These compounds help maintain an acidic gut environment that discourages harmful bacteria. Establishing noticeable changes in digestive comfort typically takes 2 to 4 weeks of daily intake.
Summary
Bifidobacterium bifidum is one of the foundational species of the human gut microbiome. It is among the first bacteria to colonise a newborn's digestive system and continues to play a supporting role throughout life. By producing lactic acid and strengthening the gut lining, B. bifidum contributes to digestive comfort and overall gut health.
FAQs
What does Bifidobacterium bifidum do?
B. bifidum supports the gut lining and produces beneficial acids that help maintain a healthy balance of bacteria in the large intestine. It is particularly well-known for its role in digestive comfort.
How long does it take to notice benefits?
Most people begin to notice improvements in digestive comfort within 2 to 4 weeks of consistent daily intake. Individual results vary depending on your existing gut health.
Can I take probiotics alongside antibiotics?
Yes, but it is best to take them at least 2 hours apart. Probiotics can help replenish beneficial bacteria that antibiotics may reduce. Consult your healthcare provider for specific advice.
Research
Wang LJ et al. — Nutrients (2024). [RCT (double-blind)]. https://pubmed.ncbi.nlm.nih.gov/39064703/
Konstantis G et al. — Nutrients (2023). [Strain-specific review].
Lukasik J et al. — JAMA Pediatr (2022). [RCT]. https://pubmed.ncbi.nlm.nih.gov/35727573/
Siddiqui R et al. — Biology (Basel) (2022). [Review]. https://pubmed.ncbi.nlm.nih.gov/36421397/
Lee SH et al. — Nat Microbiol (2021). [Preclinical + clinical]. https://pubmed.ncbi.nlm.nih.gov/33432149/
Kim CS et al. — J Gerontol A Biol Sci Med Sci (2021). [RCT (double-blind)]. https://pubmed.ncbi.nlm.nih.gov/32300799/
Andresen V et al. — Lancet Gastroenterol Hepatol (2020). [RCT (multicentre, double-blind)]. https://pubmed.ncbi.nlm.nih.gov/32277872/
Gut barrier function — established (Established). [Microbiological].
Mucus layer strengthening — established (Established). [Microbiological].
Infant colonization — established (Established). [Microbiological].
Dendritic cell modulation — established (Established). [Immunological].
Pathogen competition — established (Established). [Microbiological].
12 studies — Bifidobacterium bifidum
Wang LJ et al. — Nutrients (2024). [RCT (double-blind)]. https://pubmed.ncbi.nlm.nih.gov/39064703/
Konstantis G et al. — Nutrients (2023). [Strain-specific review].
Lukasik J et al. — JAMA Pediatr (2022). [RCT]. https://pubmed.ncbi.nlm.nih.gov/35727573/
Siddiqui R et al. — Biology (Basel) (2022). [Review]. https://pubmed.ncbi.nlm.nih.gov/36421397/
Lee SH et al. — Nat Microbiol (2021). [Preclinical + clinical]. https://pubmed.ncbi.nlm.nih.gov/33432149/
Kim CS et al. — J Gerontol A Biol Sci Med Sci (2021). [RCT (double-blind)]. https://pubmed.ncbi.nlm.nih.gov/32300799/
Andresen V et al. — Lancet Gastroenterol Hepatol (2020). [RCT (multicentre, double-blind)]. https://pubmed.ncbi.nlm.nih.gov/32277872/
Gut barrier function — established (Established). [Microbiological].
Mucus layer strengthening — established (Established). [Microbiological].
Infant colonization — established (Established). [Microbiological].
Dendritic cell modulation — established (Established). [Immunological].
Pathogen competition — established (Established). [Microbiological].
The Benefits of Lactobacillus casei rhamnosus
Probiotic strain
Lactobacillus rhamnosus is a probiotic bacterium, that is known for its strong probiotic properties. Its ability to adhere to the intestinal lining, compete with harmful bacteria, and modulate immune responses is widely documented
Key Highlights
- Among the most extensively researched probiotic strains
- Supports immune function, particularly in children and elderly
- Survives stomach acid and bile effectively
- Studied for reducing duration of digestive discomfort
Biochemistry Timeline
L. casei rhamnosus has excellent survival through the digestive tract and adheres well to intestinal cells. It begins interacting with gut-associated immune tissue shortly after reaching the intestine. Clinical effects, including improved immune markers and digestive regularity, are typically observed after 2 to 4 weeks of consistent intake.
Summary
Lactobacillus casei rhamnosus is one of the most clinically studied probiotic strains, with research spanning immune support, digestive health, and even skin conditions. Its strong survival through the digestive tract and ability to adhere to intestinal cells make it an effective and reliable probiotic choice.
FAQs
What is L. casei rhamnosus best known for?
It is best known for supporting immune function and digestive health. Clinical trials have studied its effects on reducing the duration and severity of common digestive issues.
Is this the same as Lactobacillus rhamnosus GG?
L. rhamnosus GG is a specific, well-known strain within the broader L. rhamnosus species. Our formulation uses a related strain within this extensively studied species.
Research
Trzos K, Hutsch T, Koval A et al. (2026). Probiotic Lactobacillus rhamnosus mitigates PBC-like features in Mcpip1-deficient mice via modulation of gut-liver crosstalk. Biochim Biophys Acta Mol Basis Dis. https://pubmed.ncbi.nlm.nih.gov/41846103/
Hou G, Deng H, Zhou L et al. (2026). Lactobacillus rhamnosus GG Alleviates Post-Weaning Stress-Induced Intestinal Barrier Damage and Inflammation by Promoting Intestinal Health and Modulating the Gut Microbiota in Piglets. Microorganisms. https://pubmed.ncbi.nlm.nih.gov/41753697/
Zakiudin DP, Bjerkenes Rø AD, Videm V et al. (2026). T-Cell Populations in Infancy After Maternal Probiotic Supplementation to Prevent Atopic Dermatitis. Clin Transl Allergy. https://pubmed.ncbi.nlm.nih.gov/41748464/
Fernández L, Alba C, Pérez M et al. (2026). Probiotic Strains from Canine Milk Support Gastrointestinal Health in Weaning Labrador Retriever Puppies. Animals (Basel). https://pubmed.ncbi.nlm.nih.gov/41681444/
Van Meulebroek L, Ghyselinck J, Van Elst D et al. (2026). The impact of Symprove™ multi-strain probiotic on enterotoxigenic Escherichia coli- or antibiotic-induced gut microbiome dysbiosis using high-throughput in vitro screening. Food Res Int. https://pubmed.ncbi.nlm.nih.gov/41652742/
Racioppo A, Corbo MR, Guerrieri A et al. (2026). In Vitro Assessment of Gut Microbiota Modulation Through Functional Biscuits Enriched with Almond By-Products. Foods. https://pubmed.ncbi.nlm.nih.gov/41596911/
Wu Y, You X, Huang S et al. (2026). Utilizing an In Vitro Fermentation Model to Assess Probiotics on Eimeria-Disturbed Cecal Microbiome and Metabolome. Animals (Basel). https://pubmed.ncbi.nlm.nih.gov/41594435/
Li S, Tong Y, Li Y et al. (2026). Lactobacillus rhamnosus RL-H3-005 ameliorates Enterococcus faecium-induced pulmonary inflammation via gut microbiota remodeling and macrophage polarization regulation. Food Res Int. https://pubmed.ncbi.nlm.nih.gov/41539833/
Sun B, Hu C, Wang Q et al. (2026). Probiotic Administration Reshapes the Sex Differentiation Trajectory of Zebrafish under Perfluorobutanesulfonate Challenge. Environ Sci Technol. https://pubmed.ncbi.nlm.nih.gov/41539653/
Peng C, Pan Y, Wu M et al. (2026). Effects of Lacticaseibacillus rhamnosus MP108 on functional constipation symptoms and gut microbiota in children. Pediatr Res. https://pubmed.ncbi.nlm.nih.gov/41519948/
Li N, Zhu Z, Wu S et al. (2026). Effects of a novel synbiotic intervention on abdominal visceral fat reductions and gut microbiota in overweight and obese adults: A randomized, double-blind, placebo-controlled trial. Clin Nutr. https://pubmed.ncbi.nlm.nih.gov/41512635/
Ma Y, Luo H, Chen J et al. (2026). Lactobacillus rhamnosus and Xylo-oligosaccharides improve meat quality and modulate the microbiota composition of Magang geese aged 22-50 days. Poult Sci. https://pubmed.ncbi.nlm.nih.gov/41265136/
Argentino G, Paribello G, Foderini A et al. (2025). Synbiotic Supplementation for Chronic Constipation in Patients Under Peritoneal Dialysis: An Italian Multicenter Prospective Study. J Ren Nutr. https://pubmed.ncbi.nlm.nih.gov/41563920/
Huang J, Zou Q, Chen Y et al. (2025). Probiotic supplementation on cognitive and other aging-related physiological functions in middle-aged and older adults with mild cognitive impairment (PCAMCI): protocol for a randomized, triple-blinded, placebo-controlled trial. Nutr J. https://pubmed.ncbi.nlm.nih.gov/41462287/
Viteri-Echeverría J, Calvo-Lerma J, García-Hernández J et al. (2025). Assessment of the Isolated and Combined Impact of β-Glucan and Lacticaseibacillus rhamnosus on Cystic Fibrosis Gut Microbiota Using a SHIME(®) System. Nutrients. https://pubmed.ncbi.nlm.nih.gov/41374046/
Ademoyegun AB, Ojo ET, Rasaq WA et al. (2025). Effects of exercise with probiotics, exercise alone, and probiotics alone on physical, motor, affective, and cognitive functions in stroke patients: a randomised controlled trial. BMC Sports Sci Med Rehabil. https://pubmed.ncbi.nlm.nih.gov/41291801/
Shim YH, Jang J, Jung I et al. (2025). The impact of probiotics on testosterone synthesis in the TM3 cell line. Clin Exp Reprod Med. https://pubmed.ncbi.nlm.nih.gov/41287565/
Itova T (2025). Prophylactic probiotic combinations and their effect on the course of neonatal jaundice: A comparative cohort study. J Neonatal Perinatal Med. https://pubmed.ncbi.nlm.nih.gov/41237165/
Ghazvineh D, Dodangeh M, Razmjou S et al. (2025). The Effect of High-Intensity Interval Training and Mixed Probiotic Supplementation on SMOC-1 Gene Expression, Insulin Resistance, and Blood Glucose in Male Rats With Induced Diabetes. J Diabetes Res. https://pubmed.ncbi.nlm.nih.gov/41194976/
Choi D, Fan X, Yu JH (2025). Comprehensive Review of Dietary Probiotics in Reducing Aflatoxin B(1) Toxicity. Toxins (Basel) [Review]. https://pubmed.ncbi.nlm.nih.gov/41150183/
20 studies — Lactobacillus casei rhamnosus
Trzos K, Hutsch T, Koval A et al. (2026). Probiotic Lactobacillus rhamnosus mitigates PBC-like features in Mcpip1-deficient mice via modulation of gut-liver crosstalk. Biochim Biophys Acta Mol Basis Dis. https://pubmed.ncbi.nlm.nih.gov/41846103/
Hou G, Deng H, Zhou L et al. (2026). Lactobacillus rhamnosus GG Alleviates Post-Weaning Stress-Induced Intestinal Barrier Damage and Inflammation by Promoting Intestinal Health and Modulating the Gut Microbiota in Piglets. Microorganisms. https://pubmed.ncbi.nlm.nih.gov/41753697/
Zakiudin DP, Bjerkenes Rø AD, Videm V et al. (2026). T-Cell Populations in Infancy After Maternal Probiotic Supplementation to Prevent Atopic Dermatitis. Clin Transl Allergy. https://pubmed.ncbi.nlm.nih.gov/41748464/
Fernández L, Alba C, Pérez M et al. (2026). Probiotic Strains from Canine Milk Support Gastrointestinal Health in Weaning Labrador Retriever Puppies. Animals (Basel). https://pubmed.ncbi.nlm.nih.gov/41681444/
Van Meulebroek L, Ghyselinck J, Van Elst D et al. (2026). The impact of Symprove™ multi-strain probiotic on enterotoxigenic Escherichia coli- or antibiotic-induced gut microbiome dysbiosis using high-throughput in vitro screening. Food Res Int. https://pubmed.ncbi.nlm.nih.gov/41652742/
Racioppo A, Corbo MR, Guerrieri A et al. (2026). In Vitro Assessment of Gut Microbiota Modulation Through Functional Biscuits Enriched with Almond By-Products. Foods. https://pubmed.ncbi.nlm.nih.gov/41596911/
Wu Y, You X, Huang S et al. (2026). Utilizing an In Vitro Fermentation Model to Assess Probiotics on Eimeria-Disturbed Cecal Microbiome and Metabolome. Animals (Basel). https://pubmed.ncbi.nlm.nih.gov/41594435/
Li S, Tong Y, Li Y et al. (2026). Lactobacillus rhamnosus RL-H3-005 ameliorates Enterococcus faecium-induced pulmonary inflammation via gut microbiota remodeling and macrophage polarization regulation. Food Res Int. https://pubmed.ncbi.nlm.nih.gov/41539833/
Sun B, Hu C, Wang Q et al. (2026). Probiotic Administration Reshapes the Sex Differentiation Trajectory of Zebrafish under Perfluorobutanesulfonate Challenge. Environ Sci Technol. https://pubmed.ncbi.nlm.nih.gov/41539653/
Peng C, Pan Y, Wu M et al. (2026). Effects of Lacticaseibacillus rhamnosus MP108 on functional constipation symptoms and gut microbiota in children. Pediatr Res. https://pubmed.ncbi.nlm.nih.gov/41519948/
Li N, Zhu Z, Wu S et al. (2026). Effects of a novel synbiotic intervention on abdominal visceral fat reductions and gut microbiota in overweight and obese adults: A randomized, double-blind, placebo-controlled trial. Clin Nutr. https://pubmed.ncbi.nlm.nih.gov/41512635/
Ma Y, Luo H, Chen J et al. (2026). Lactobacillus rhamnosus and Xylo-oligosaccharides improve meat quality and modulate the microbiota composition of Magang geese aged 22-50 days. Poult Sci. https://pubmed.ncbi.nlm.nih.gov/41265136/
Argentino G, Paribello G, Foderini A et al. (2025). Synbiotic Supplementation for Chronic Constipation in Patients Under Peritoneal Dialysis: An Italian Multicenter Prospective Study. J Ren Nutr. https://pubmed.ncbi.nlm.nih.gov/41563920/
Huang J, Zou Q, Chen Y et al. (2025). Probiotic supplementation on cognitive and other aging-related physiological functions in middle-aged and older adults with mild cognitive impairment (PCAMCI): protocol for a randomized, triple-blinded, placebo-controlled trial. Nutr J. https://pubmed.ncbi.nlm.nih.gov/41462287/
Viteri-Echeverría J, Calvo-Lerma J, García-Hernández J et al. (2025). Assessment of the Isolated and Combined Impact of β-Glucan and Lacticaseibacillus rhamnosus on Cystic Fibrosis Gut Microbiota Using a SHIME(®) System. Nutrients. https://pubmed.ncbi.nlm.nih.gov/41374046/
Ademoyegun AB, Ojo ET, Rasaq WA et al. (2025). Effects of exercise with probiotics, exercise alone, and probiotics alone on physical, motor, affective, and cognitive functions in stroke patients: a randomised controlled trial. BMC Sports Sci Med Rehabil. https://pubmed.ncbi.nlm.nih.gov/41291801/
Shim YH, Jang J, Jung I et al. (2025). The impact of probiotics on testosterone synthesis in the TM3 cell line. Clin Exp Reprod Med. https://pubmed.ncbi.nlm.nih.gov/41287565/
Itova T (2025). Prophylactic probiotic combinations and their effect on the course of neonatal jaundice: A comparative cohort study. J Neonatal Perinatal Med. https://pubmed.ncbi.nlm.nih.gov/41237165/
Ghazvineh D, Dodangeh M, Razmjou S et al. (2025). The Effect of High-Intensity Interval Training and Mixed Probiotic Supplementation on SMOC-1 Gene Expression, Insulin Resistance, and Blood Glucose in Male Rats With Induced Diabetes. J Diabetes Res. https://pubmed.ncbi.nlm.nih.gov/41194976/
Choi D, Fan X, Yu JH (2025). Comprehensive Review of Dietary Probiotics in Reducing Aflatoxin B(1) Toxicity. Toxins (Basel) [Review]. https://pubmed.ncbi.nlm.nih.gov/41150183/
The Benefits of Lactobacillus acidophilus
Probiotic strain
Lactobacillus acidophilus is a probiotic bacterium naturally found in the human gut and other parts of the body. As a probiotic, it helps maintain a healthy balance of bacteria in the body and offers numerous health benefits, particularly related to digestion, immunity, and vaginal health.
Key Highlights
- The most well-known probiotic species worldwide
- Produces lactic acid to maintain an acidic gut environment
- Supports lactose digestion in sensitive individuals
- Contributes to vaginal and urinary tract health
Biochemistry Timeline
Lactobacillus acidophilus reaches the small and large intestine, where it produces lactic acid, hydrogen peroxide, and bacteriocins. These compounds create an environment that supports beneficial bacteria while discouraging less desirable organisms. Colonisation begins within days, with digestive benefits typically noticed within 1 to 3 weeks.
Summary
Lactobacillus acidophilus is perhaps the most recognised probiotic strain, and for good reason. It produces lactic acid that helps maintain the gut's natural pH balance, supports healthy digestion, and may improve lactose tolerance. It is well-tolerated and has decades of safe use behind it.
FAQs
Can L. acidophilus help with lactose intolerance?
Some research suggests L. acidophilus can help improve lactose digestion by producing the enzyme lactase. While it may not eliminate symptoms entirely, it can improve comfort for some individuals.
Should I take L. acidophilus with food?
Taking probiotics with food or shortly after a meal can improve survival through stomach acid. A small amount of fat in the meal may further support absorption.
Research
Huang Y et al. — Cell Host Microbe (2025). [Preclinical + mechanistic]. https://pubmed.ncbi.nlm.nih.gov/40812303/
Shah AB et al. — Gut Microbes (2024). [Comprehensive review]. https://pubmed.ncbi.nlm.nih.gov/39582101/
Wu L et al. — Gut Microbes (2024). [Preclinical + mechanistic]. https://pubmed.ncbi.nlm.nih.gov/39205654/
Mollazadeh-Narestan Z et al. — Probiotics Antimicrob Proteins (2023). [RCT]. https://pubmed.ncbi.nlm.nih.gov/36198994/
Gao H et al. — J Microbiol Biotechnol (2022). [Review]. https://pubmed.ncbi.nlm.nih.gov/36196014/
Sergeev IN et al. — Nutrients (2020). [RCT]. https://pubmed.ncbi.nlm.nih.gov/31952249/
Russo R et al. — Mycoses (2019). [RCT]. https://pubmed.ncbi.nlm.nih.gov/30565745/
Russo R et al. — Benef Microbes (2019). [Clinical study]. https://pubmed.ncbi.nlm.nih.gov/30525953/
Strain characteristics — established (Established). [Microbiological].
Cholesterol reduction — established (Established). [Multiple studies].
NCFM strain — established (Established). [Strain documentation].
Lactose intolerance support — established (Established). [Clinical evidence].
12 studies — Lactobacillus acidophilus
Huang Y et al. — Cell Host Microbe (2025). [Preclinical + mechanistic]. https://pubmed.ncbi.nlm.nih.gov/40812303/
Shah AB et al. — Gut Microbes (2024). [Comprehensive review]. https://pubmed.ncbi.nlm.nih.gov/39582101/
Wu L et al. — Gut Microbes (2024). [Preclinical + mechanistic]. https://pubmed.ncbi.nlm.nih.gov/39205654/
Mollazadeh-Narestan Z et al. — Probiotics Antimicrob Proteins (2023). [RCT]. https://pubmed.ncbi.nlm.nih.gov/36198994/
Gao H et al. — J Microbiol Biotechnol (2022). [Review]. https://pubmed.ncbi.nlm.nih.gov/36196014/
Sergeev IN et al. — Nutrients (2020). [RCT]. https://pubmed.ncbi.nlm.nih.gov/31952249/
Russo R et al. — Mycoses (2019). [RCT]. https://pubmed.ncbi.nlm.nih.gov/30565745/
Russo R et al. — Benef Microbes (2019). [Clinical study]. https://pubmed.ncbi.nlm.nih.gov/30525953/
Strain characteristics — established (Established). [Microbiological].
Cholesterol reduction — established (Established). [Multiple studies].
NCFM strain — established (Established). [Strain documentation].
Lactose intolerance support — established (Established). [Clinical evidence].
The Benefits of Streptococcus thermophilus
Probiotic strain
Streptococcus thermophilus is a probiotic lactic acid bacterium widely used in the food industry, especially for making yogurt and cheese. It is used for its ability to ferment lactose and its potential health benefits for the gut.
Key Highlights
- A key bacterial strain used in yoghurt production for centuries
- Produces lactase to support lactose digestion
- Enhances the growth of other beneficial bacteria
- Generally recognised as safe with a long history of food use
Biochemistry Timeline
Streptococcus thermophilus begins working in the upper digestive tract, producing the enzyme lactase that helps break down lactose. It also produces exopolysaccharides that may benefit gut barrier function. As a transient species, it does not permanently colonise the gut but provides benefits during its passage through the digestive system.
Summary
Streptococcus thermophilus has been consumed safely by humans for thousands of years as a key bacterium in yoghurt and cheese production. In supplement form, it supports lactose digestion and complements other probiotic strains by creating a favourable environment for their growth.
FAQs
Is Streptococcus thermophilus safe?
Absolutely. It has GRAS (Generally Recognised as Safe) status and has been consumed safely in fermented dairy products for thousands of years. It is one of the most well-established food-grade bacteria.
Does it colonise the gut permanently?
S. thermophilus is generally a transient species, meaning it provides benefits during its passage through the digestive tract rather than permanently colonising. This is why consistent daily intake is recommended.
Research
Su R et al. — Gut (2025). [Preclinical]. https://pubmed.ncbi.nlm.nih.gov/40122597/
Nachum Z et al. — Nutrients (2025). [Clinical trial]. https://pubmed.ncbi.nlm.nih.gov/39940318/
Ben Othman R et al. — Endocrinol Diabetes Metab (2023). [Review]. https://pubmed.ncbi.nlm.nih.gov/36606510/
Alemu BK et al. — Am J Obstet Gynecol MFM (2023). [Review]. https://pubmed.ncbi.nlm.nih.gov/37660760/
Li Q et al. — Gastroenterology (2021). [Preclinical + clinical]. https://pubmed.ncbi.nlm.nih.gov/32920015/
Skrzydło-Radomańska B et al. — Nutrients (2021). [RCT]. https://pubmed.ncbi.nlm.nih.gov/33652763/
Martinović A et al. — Nutrients (2020). [Review]. https://pubmed.ncbi.nlm.nih.gov/32708008/
van den Akker CHP et al. — J Pediatr Gastroenterol Nutr (2020). [Position paper]. https://pubmed.ncbi.nlm.nih.gov/32332478/
Kok CR & Hutkins R — Nutr Rev (2018). [Review]. https://pubmed.ncbi.nlm.nih.gov/30452699/
Lactose digestion — established (Established). [Established science].
Synergistic activity — established (Established). [Microbiological].
11 studies — Streptococcus thermophilus
Su R et al. — Gut (2025). [Preclinical]. https://pubmed.ncbi.nlm.nih.gov/40122597/
Nachum Z et al. — Nutrients (2025). [Clinical trial]. https://pubmed.ncbi.nlm.nih.gov/39940318/
Ben Othman R et al. — Endocrinol Diabetes Metab (2023). [Review]. https://pubmed.ncbi.nlm.nih.gov/36606510/
Alemu BK et al. — Am J Obstet Gynecol MFM (2023). [Review]. https://pubmed.ncbi.nlm.nih.gov/37660760/
Li Q et al. — Gastroenterology (2021). [Preclinical + clinical]. https://pubmed.ncbi.nlm.nih.gov/32920015/
Skrzydło-Radomańska B et al. — Nutrients (2021). [RCT]. https://pubmed.ncbi.nlm.nih.gov/33652763/
Martinović A et al. — Nutrients (2020). [Review]. https://pubmed.ncbi.nlm.nih.gov/32708008/
van den Akker CHP et al. — J Pediatr Gastroenterol Nutr (2020). [Position paper]. https://pubmed.ncbi.nlm.nih.gov/32332478/
Kok CR & Hutkins R — Nutr Rev (2018). [Review]. https://pubmed.ncbi.nlm.nih.gov/30452699/
Lactose digestion — established (Established). [Established science].
Synergistic activity — established (Established). [Microbiological].
Sustainably delivered and refilled, monthly.
Personalized Plan
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Try it for 90 days completely risk-free.
Formulated without gluten, dairy, corn and common allergens.
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Questions?
We're here to help.
Probio supports the balance of good bacteria in your gut, which can help promote smoother digestion, reduce occasional bloating, and support gut health overall. It’s a simple way to care for your inner balance daily.
If you’re unsure whether probiotics are right for you, our free online health assessment can help. It’s quick, personalised, and gives supplement suggestions tailored to your body, no subscription needed.
Take 1 to 2 capsules, once or twice daily, ideally on an empty stomach with a glass of water. Avoid hot drinks when taking your capsule to protect the live cultures.
Yes, many people combine probiotics with other vitamins and supplements. If you're unsure what's right for your body, we offer a free health assessment on our website. Simply click the "Take Test Now" button, it only takes a few minutes and gives personalised suggestions with no subscription required.
For best results, we recommend taking Probio on an empty stomach with water, either first thing in the morning or between meals. Please avoid taking it with hot drinks, as heat can damage the live cultures.
Probiotics are sometimes recommended during pregnancy or breastfeeding, but please speak to your healthcare provider first to be sure it’s right for you and your baby.
Yes, probiotics are often used as a gentle, long-term addition to a healthy lifestyle. You can take Probio regularly, but it's always wise to check in with your body and healthcare provider along the way.
Probiotics are generally well tolerated, but a small number of people may experience mild bloating or changes in digestion during the first few days. This usually passes as your gut adjusts.
If you are taking medication or are under medical supervision, please consult your doctor before starting any new supplement, including probiotics. This ensures it’s safe and appropriate for your individual needs.
Fermented foods like yoghurt or sauerkraut contain natural probiotics, but in much lower and less predictable amounts. Our Probio delivers a stable 10 billion CFU per capsule, offering more targeted and consistent support.
Some people notice changes in digestion within a few days, while for others it may take a few weeks of consistent use. Everyone's gut is different, give your body time to adjust and respond.
Not at all. You can spread the capsules throughout the day depending on your routine and comfort. Just remember to take them on an empty stomach with water.
No worries, just continue with your next scheduled dose. There’s no need to double up. Consistency matters more than perfection when it comes to probiotics.
Our formula is developed for adults. If you're considering giving it to a child or someone elderly, we recommend speaking with a healthcare professional first.
Probio does not contain common allergens in its recipe, but it is manufactured in a facility that handles allergy-based materials. If you have a known allergy, please consult your doctor before use.
Our Vitamins are manufactured in the UK under strict GMP (Good Manufacturing Practice) standards. It’s then handled and packed in Denmark with full traceability. Each batch undergoes rigorous quality and safety checks to ensure purity, potency, and consistency , so you always know you're getting exactly what’s on the label.
Yes, our Probio capsules are fully vegan and made without animal-derived ingredients. The capsule shell is plant-based and gentle on digestion.
Every 30 days we prepare a fresh delivery of your personalized supplements. Your first order arrives in a reusable dispenser box, and every refill after that comes in a biodegradable pouch that slots straight into your dispenser. There's no lock-in, so you can pause, skip, or cancel anytime from your account.
Subscribers save 16% on every delivery, applied automatically. No setup fees, no hidden charges. The discount stays the same as long as your subscription is active.
Yes. You can pause, skip, or cancel anytime from your account dashboard with no minimum commitment and no cancellation fee. If you pause or skip, your next delivery simply waits until you're ready to resume.
Your payment method is charged 3 to 5 days before your next scheduled dispatch date, so your shipment arrives before your current supply runs out. You can view the exact date anytime by logging into your account.
Your first order includes the reusable dispenser box plus your personalized daily supplement pouches. Every refill after that comes in biodegradable pouches that slot straight into your existing dispenser, so you're only replacing what needs replacing.
Our free 3-minute health quiz asks about your body, lifestyle, diet, goals, and any health concerns. The algorithm then matches you to the nutrients your body is most likely to need, drawing on peer-reviewed research and EFSA-approved evidence. No guesswork, no one-size-fits-all.
Yes. You can retake the quiz anytime to refresh your recommendation, or add, swap, or remove individual supplements from your account dashboard. Your plan evolves with you.
Our supplements are formulated to EU safety standards and produced in certified facilities. The quiz screens for interactions with anything you're already taking and flags potential conflicts. For specific medical conditions or prescription drugs, we always recommend checking with your doctor before starting.
Orders are dispatched within 1 to 3 business days of payment. Delivery typically takes another 2 to 10 business days depending on your location and chosen carrier. Once your order ships, you'll receive a tracking link by email so you can follow it the whole way.
We currently ship to Denmark, Scandinavia, and select European countries. Available delivery areas are shown at checkout. If your country isn't listed, email support@persona-path.com and we'll see what's possible.
First-time customers are covered by our 30-day money-back guarantee. If you're not fully satisfied with your first purchase, email support@persona-path.com within 30 days and we'll refund you in full. You don't need to return the supplements, and refunds are processed to your original payment method within 5 business days of approval.
Yes. In addition to our 30-day guarantee, EU law gives you a 14-day right of withdrawal from the day you receive your order. Email support@persona-path.com within 14 days and we'll refund the full purchase price, including standard delivery, within 14 days of your request.
Email support@persona-path.com within 7 days with your order number and a photo of the issue. We'll arrange a free replacement or issue a full refund for the affected product. We cover all costs in these cases.
Yes. Your quiz answers are processed under GDPR with your explicit consent and used only to generate your personalized plan. We never sell your data or share it with advertising platforms. You can request deletion at any time. Full details in our privacy policy.
Our quiz screens for pregnancy, breastfeeding, and major health conditions, and the algorithm adjusts your recommendations accordingly. We're not a substitute for medical advice, so please check with your doctor before starting any new supplement if you're pregnant, breastfeeding, or managing a health condition.
How we verify and process reviews
We use our custom-built review system to collect, verify, and display reviews on our website. Every review you see here comes directly from real customers.
We automatically send review requests to customers for whom we have a record that they purchased products directly from our website. This allows us to verify the review's reliability through technical means, such as the customer's email address. Reviews submitted through such requests are marked as "Verified purchase" and display a verified badge.
If a customer submits a review directly through our website without a matching purchase record, the review will not be marked as verified. These reviews are still published but will not display the verified badge.
All reviews go through a moderation process before being published. We check for authenticity, relevance, and compliance with our community guidelines. We do not edit review content, censor negative feedback, or selectively publish only positive reviews.
What our customers are saying
Here is what they love about Probio Refill:
My bloating is gone and my belly feels so much better. Thank you!!!
Thank you so much we are so pleased that you are happy with our product and service :) Have a great day!

