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.
Trusted worldwide
A legacy built on trust and expertise.
Rooted in science
Guided by probiotic research.
Commitment to quality
Ensuring potency and reliability.
Designed for diverse needs
Supporting gut and women’s health.
VSL#3® Capsules
The #1 gastroenterologist-recommended multi-strain probiotics brand†
VSL#3® capsules are a gold standard in probiotics – trusted by healthcare professionals and patients for the dietary management of GI conditions and to support microbiota balance and digestive well-being.
- 8 complementary probiotic strains from 3 genera
- Formulated for the dietary management of IBS and ulcerative colitis
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.
Committed to Potency
Potent probiotic formulations guaranteed to maintain labeled CFU counts through expiration.
Designed for Viability
Carefully designed formulations that help safeguard live
cteria from production to delivery.
Science-Led Strain Selection
Thoughtfully formulated with complementary probioti strains chosen for function and purpose
A Legacy of Expertise
A probiotic heritage recognized for its consistenc)
credibility, and professional trust.
Why Doctors Trust VSL#3®
"The best product for lBD. l strongly
recommend VSL#3®."
Dr. Victor Gallo
Garden City Colon and Rectal Surgery Practice-Garden City, NY
"l recommend VSL#3® for maintenance of a
healthy gut microbiome."
Dr. George Barret MD
Founder and Chief of Gastroenterology Beth Israel Deaconess Hospital - Milton, MA
"l've had great success in using VSL#3® post colonoscopy, and especially so in my lBs and UC
patients."
Dr. William Andy Shaver MD
Gastroenterologist - Lubbock, TX
VSL#3® Is Scientifically Formulated For
The Dietary Management of IBS
Doctor Recommended
In a 2002 survey of gastroenterologists, 93% reported that IBS patients were satisfied with VSL#3.¹
The most frequently observed benefits:
- Less bloating
- Reduced pain
- Better stool consistency and frequency
- Overall symptom improvement
Clinically Studied and FODMAP Friendly Certified for the Dietary Management of IBS
In a 2021 clinical study, VSL#3®showed outcomes comparable to those achieved with a low FODMAP diet² — a commonly recommended but restrictive approach. Because VSL#3®is certified FODMAP Friendly, it can also be used alongside a low FODMAP diet for flexible dietary management.
1. Data on file 2. Ankerson L, et al.J Med Internet Res.2021; 23(12): e30291.
It’s What’s on the Inside
Our unique 8-strain formulation is designed so each strain complements the others, helping maintain a balanced gut microbiota. Billions of live, beneficial bacteria work together to support digestive health.
Bifidobacterium
Bifidobacterium breve,Bifidobacterium lactis(previously classified as B.infantis), Bifidobacterium lactis(previously classified as B.longum)
Lactobacillus
Lactobacillus acidophilus,Lactobacillus helveticus(previously classified as L.delbrueckii subsp. bulgaricus),Lactobacillus paracasei,Lactobacillus plantarum
Streptococcus
Streptococcus thermophilus
VSL#3® Capsules:
Clean Ingredients. Verified Quality.
Free From Common Irritants:
- Dairy-Free
- Gluten-Free
- Soy-Free
- Nut-Free
- No GMOs
- Vegan
Certified for Peace of Mind:
- FODMAP Friendly Certified
- Halal Certified
- Kosher Certified
More Than a Probiotic.
A Powerful Medical Food.
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.
