Science-backed probiotics,Legacy you trust.Results that deliver.

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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

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  • Commitment to quality

    Ensuring potency and reliability.

  • Designed for diverse needs

    Supporting 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.

    • Committed to Potency

      Potent probiotic formulations guaranteed tomaintain labeled CFU counts throughexpiration.

    • Designed for Viability

      Carefully designed formulations that helpsafeguard live bacteria from production todelivery.

    • Science-Led Strain Selection

      Thoughtfully formulated with complementaryprobiotic strains chosen for function andpurpose.

    • A Legacy of Expertise

      A probiotic heritage recognized for itsconsistency, credibility, and professionaltrust.

      What Our Customers Say

      • Works Great!

        Really calms my Gut. i'm so thankful mydoctor recommended this product! itworks well everyday.

        Carol F.

      • Best Probiotic ever!

        Can't live without it! Keeps my digestivesystem in its lane and I don't have to beon edge all the time about getting sick...

        Awilda G.

      • Best probiotic ever

        My doctor recommended l should useVSL#3 probiotics. lt has honestlyimproved my quality of life. lt is expensi...

        SHARON R.

      • Wonderful Probbiotic

        This is the only probiotic that works for me!

        Daryl R.

      • Miraculous. Everyone should be on this

        The most amazing probiotic on theplanet. Healed my belly when NOTHINGelse would.

        Kelly F.

      • Works Great!

        Awesome product. worked better thanother probiotics l've tried.

        CarV.

        Clean Ingredients. Trusted Standards.

        We believe what's not in your probiotic is just as important as what is.

        • Dairy-Free

        • Gluten-Free

        • No GMOs

        • Soy-Free

          The VSL@ Probiotics Difference

          Medical Foods & Supplements

          From medical foods formulated for the dietarymanagement of Gl conditions to supplements fordaily wellness, VSL® Probiotics is made to thehighest standards of quality and consistency.

          Proven Potency

          Up to 900 billion live bacteria per servingverified to maintain labeled CFU counts throughexpiration when stored as recommended.

          Evidence-Based Formulations

          Formulated with probiotic strains andcombinations supported by published researchand guided by microbiome science.

          Trusted by Professionals

          Rooted in the heritage of VSL#3®_a probiotictrusted by healthcare professionals-VSL®Probiotics carries that same dedication to qualityand research into every new formulation.

          VSL#3® Benefits:

          A Clinically Studied Medical Food

          VSL#3® is a medical-grade formulation supported byclinical research.

          Ultra-High Potency, Guaranteed
          Contains 112.5 billion live bacteria (CFU) per capsulean ultra-high-potency formula designed to keep itslabeled potency through expiration when stored underrecommended conditions.

          Multi-Strain
          8 complementary strains from 3 different genera.

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