Over 70% of fertility clinics in the U.S.trust Theralogix.

Fertility supplements for men and women,specifically designed for those ready to start a family.

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Research-Backed, Clinically Studied Dose

Balanced to mirror your body's naturally occurring ratio of 40 to 1*

per daily serving

Recent studies have shown that taking a combination of these two forms, in this ratio, is more beneficial than taking either myo-inositol or D-chiro-inositol alone, and more beneficial than other inositol ratios."

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  • Backed by
    Science

  • Premium
    Ingredients

  • Independently
    Tested & Certified

  • Trusted by Providers
    & Patients

    The #1 Inositol Supplement

    Ovasitol's combination of myo- and d-chiro-inositol supports healthy insulin and hormone levels, menstrual regularity, and fertility. Ovasitol is the only independently tested and certified 40:1 inositol supplement. It’s the one you can trust.

    Supplements from Science

    At Theralogix, our methodology is simple: We only create products that are backed by published scientific evidence. To ensure that we stay true to this unwavering commitment, we prioritize research that demonstrates our products will address a specific need.

    As science evolves, so do we, continuing to develop new products and improve current ones.​

    Exceptional Ingredients, Without Exception

    We never compromise on quality. We source only the finest ingredients to maximize performance and bioavailability and we prioritize the specific nutrient forms used in published clinical research.​

    Certified Pure

    Not all supplements are created equal. Our products are certified for content accuracy and purity by NSF® International – one of the most rigorous third-party dietary supplement testing programs in the world. This certification guarantees that our supplements contain exactly what they should, and nothing they shouldn’t.

    And it’s never one and done. Our supplements continually undergo re-testing so you can trust every single product, every single time.  

    For more information on our commitment to testing and certification visit our FAQs.  ​

    We Don't Round Up. We Pass Savings Down.

    You might notice our prices are oddly specific — and that’s on purpose.
    We don’t believe in rounding up just to make things look cleaner on the surface. Instead, we pass every possible saving directly on to you. No hidden agenda. Just honest pricing that further reflects our commitment to transparency — down to the last cent.

    Referred & Preferred for Decades

    Thousands of physicians and other healthcare providers around the country have recommended us to their patients since 2002.

    Over a million referrals and counting.

    Our supplements are the top choice for providers and patients who rely on superior quality. ​

    Clinical Trials

    Another reason to feel good about choosing Theralogix: Top universities do, too. Research institutions, including the National Institutes of Health, Harvard University, and Cornell-Weill Medical College, have chosen to use Theralogix products in ongoing clinical trials. They trust our supplements for their high-quality and content-accurate formulations.

    We’re honored that our work helps further the field of nutritional science.​

    Long-Term Health

    Long-term health requires a long-term commitment. That’s why we support you with a convenient auto-refill program that ensures you have an uninterrupted supply of the nutrients you need. At Theralogix, we’re with you every step of the way. ​

    A Physician on a Mission

    At the heart of the Theralogix brand is physician and Chief Science Officer, Dr. Mark Ratner. In 2002, he founded the company to create nutritional supplements that healthcare providers could believe in – and patients could benefit from.

    Guided by physicians and scientists at the nation’s leading hospitals and academic medical centers, the Theralogix product family launched with a single men’s health supplement.

    Our product line has now grown to 30+ supplements spanning multiple specialties – fertility, rheumatology, urology, women’s health, and more.​

    Medical Advisory Board

    No supplement brand goes further than Theralogix to ensure scientifically-sound products. For proof, look no further than our Medical Advisory Board (MAB).

    Made up of a carefully selected group of physicians, top research scientists, and faculty members at leading U.S. medical schools, our MAB evaluates and approves new product formulations, while offering guidance to improve existing ones. ​

    • KRISTIN A.BENDIKSON, MD

      Assistant Professor of Obstetrics and Gynecology Assistant Fellowship Director, Division of Reproductive Endocrinology and Infertility Keck School of Medicine of the University of Southern California USC Fertility, Los Angeles,CA

    • ROBERT J.STILLMAN.MD, FACOG

      Clinical Professor,Department of Obstetrics and Gynecology Georgetown University School of Medicine Medical Director Shady Grove Fertility Reproductive Science Center Rockville, MD

    • SERENA H CHEN, MD

      Division Director Reproductive Medicine CBMC Chief Advocacy Officer IRMS CCRM NJ Founder and VP Doctors For Fertility nfp Clinical Associate Professor Rutgers NJ and Rutgers RWJ Medical Schools Livingston and Jersey City, NJ

    • MARC GOLDSTEIN, MD, DSC（HON), FACS

      Matthew P. Hardy Distinguished Professor of Reproductive Medicine and Urology Surgeon-in-Chief, Male Reproductive Medicine and Surgery Cornell Institute for Reproductive Medicine Weill Cornell Medical College of Cornell University New York-Presbyterian Hospital/Weill Cornell Medical Center New York, NY

    • WAYNE J.G.HELLSTROM, MD, FACS

      Professor; Chief, Section of Andrology Department of Urology Tulane University School of Medicine New Orleans, LA

    • JUDD MOUL, MD, FACS

      James H. Semans,MD Professor of Surgery Director,Duke Prostate Center Division of Urologic Surgery Duke University Medical Center Durham, NC