VSL® Probiotics: A Legacy of Science in Every Strain.
Building on the trusted heritage of VSL#3®, VSL®Probiotics now includes innovative supplements like VSL4®, designed for everyday wellness.
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Trusted worldwideA legacy built on trust and expertise.
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Rooted in scienceGuided by probiotic research.
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Commitment to qualityEnsuring potency and reliability.
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Designed for diverse needsSupporting gut and women’s health.
A Gold Standard in Probiotics
- A powerful probiotic medical food
- The #1 gastroenterologist-recommended multi-strain probiotics brand†
- Ultra-high-potency — guaranteed through expiration when stored as recommended.
- 8 complementary probiotic strains from 3 different genera.
- Used in clinical practice and supported by clinical and scientific research.
Science Over Hype.Purpose Over Promises.
Built on the legacy of VSL#3®— a probiotic trusted by healthcare professionals and recognized for its scientific rigor — VSL® Probiotics continues to advance microbiome science through targeted, high-quality formulations that support both clinical dietary management and everyday wellness.
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Committed to Potency
Potent probiotic formulations guaranteed tomaintain labeled CFU counts throughexpiration.
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Designed for Viability
Carefully designed formulations that helpsafeguard live bacteria from production todelivery.
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Science-Led Strain
Thoughtfully formulated with complementaryprobiotic strains chosen for function andpurpose.
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A Legacy of Expertise
A probiotic heritage recognized for itsconsistency, credibility, and professionaltrust.
What Our Customers Say
Clean Ingredients. Trusted Standards.
We believe what's not in your probiotic is just as important as what is.
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Dairy-Free
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Gluten-Free
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No GMOs
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Soy-Free
The VSL® Probiotics Difference
Pioneers in Probiotics. Leaders in Gut Health.
VSL#3®is an ultra-high-potency probiotic medical food — and the #1 gastroenterologist-recommended multi-strain probiotics brand.†Developed for people with serious gastrointestinal conditions, it’s trusted by healthcare professionals and customers alike for its scientific foundation, clinical credibility, and unwavering quality.
Built on Science. Proven in Practice.
Driven by research — not marketing trends — VSL#3®is trusted in clinical care for the dietary management of specific gastrointestinal conditions. It continues to set the standard for potency, consistency, and reliability in probiotic therapy.
Ultra-High Potency. Guaranteed.
VSL#3®products deliver between 112.5 billion and 900 billion live bacteria per serving, depending on the formulation. Unlike many probiotics that only promise potency at the time of manufacture, VSL#3®guarantees potency through expiration when stored as directed.
Clinically Researched Formulas. Real-World Results.
Each VSL#3®product combines 8 well-characterized probiotic strains from 3 genera to help maintain a balanced intestinal microbiota and support digestive health. The VSL#3®family is specially designed for the dietary management of irritable bowel syndrome (IBS), ulcerative colitis (UC), and pouchitis.
It’s What’s on the Inside
Our unique8-strain formulationis designed so each strain complements the others, helping maintain a balanced gut microbiota. Billions of live, beneficial bacteria work together to support digestive health.
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Bifidobacterium
Bifidobacterium breve,Bifidobacteriumlactis (previously classified as B.infantis),Bifidobacterium lactis(previously classified asB. longum)
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Lactobacillus
Lactobacillus acidophilus,Lactobacillushelveticus (previously classified as L.delbrueckii subsp. bulgaricus),Lactobacillus paracasei,Lactobacillusplantarum
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Streptococcus
Streptococcus thermophilus
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VSL#3®combines 8
complementary probiotic strains from 3 different genera to supportgut microbiota diversity and digestive balance.
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VSL#3® is distributed in over 40
countries and counting - it's trusted by healthcare professionals andpatients worldwide.
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VSL#3® is Dairy-Free
for individuals who avoid dairy due to dietary preferences or
sensitivities.
