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 foreveryday 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.

    • Dairy-Free

    • Soy-Free

    • Non-GMO

    • Gluten-Free

    • vegan

    • Nut-Free

      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.

      Ultra-High Potency. Guaranteed.

      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.

      • Bifidobacterium

        Bifidobacterium breve,Bifidobacterium lactis(previously classified asB.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® combines

          complementary probiotic strains from 3 differentgenera to support gut microbiota diversity anddigestive balance.

        • VSL#3® is distributed in over40

          countries and counting - it's trusted by healthcareprofessionals and patients worldwide.

        • VSL#3® isDairy-Free

          for individuals who avoid dairy due to dietarypreferences or sensitivities.