Myo-Inositol & D-Chiro Inositol Powder for PCOS - 90 Day Supply - Optimal 40:1 Ratio - Fertility & Menstrual Health for Women
Myo-Inositol & D-Chiro Inositol Powder for PCOS - 90 Day Supply - Optimal 40:1 Ratio - Fertility & Menstrual Health for Women
- Ovulation Support Supplement: This supplement uses 4000 mg myo-inositol and 100 mg D-chiro inositol in your natural ratio of 40:1, which is twice the typical daily dose.
- Fertility Supplement for Women: This inositol supplement may help support fertility and normal menstrual cycles in women with PCOS, and oocyte (egg) quality in women trying to conceive.
- Menstrual Cycle Supplement: Ovasitol may help support improved metabolic factors in women with polycystic ovarian syndrome (PCOS).
- Purity Tested: Our supplements are independently verified for potency and purity by NSF; gluten-free, no dyes, vegan, contains no additives and made with premium ingredients.
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The #1 Inositol Supplement
A 100% pure inositol supplement, Ovasitol's combination of myo- and d-chiro-inositol supports improved metabolic factors and fertility in women withPCOS. Ovasitol is the only independently tested and certified 40:1 inositol supplement. It’s the one you can trust.
Ovasitol is the only 40:1 inositol supplement independently tested and certified for content accuracy, purity, and freedom from contaminants.
Scientifically Formulated.
Ovasitol contains a combination of myo-inositol and d-chiro-inositol in the body's natural ratio of 40 to 1. Research concludes that this ratio is more effective than other inositol ratios or either form of inositol alone.
100% Pure Inositol with No Additives
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Ovasitol does not contain any animal-derived products
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Certified gluten-free
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No artificial dyes or colorants
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Manufactured in a certified cGMP-compliant facility
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Independently tested & content certified
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Manufactured in the USA
PCOS Support.
Ovasitol is formulated to help support improved metabolic factors, normal menstrual cycles, and fertility in women with polycystic ovary syndrome (PCOS).
Optimal Dosing. Twice the Inositol.
Just two packets per day provide 4,000 mg myo-inositol and 100 mg of d-chiro-inositol, twice the daily dose of other brands.
What’s the difference between Ovasitol and Ovasitol Plus?
Ovasitolis our original 40:1 inositol supplement. It provides 4,000 mg of myo-inositol and 100 mg of d-chiro-inositol per daily dose to support menstrual regularity, ovarian function, and healthy hormone, blood sugar, and lipid levels.* 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.*
Ovasitol Plus features the exact 40:1 inositol ratio in the original Ovasitol, plus additional nutrients for optimal absorption and enhanced benefits:
Ovasitol Plus is ideal for individuals looking for additional metabolic support, or those who haven’t achieved their desired results with inositols alone.*
It’s What’s Inside That Counts
Research-backed formulations. Premium ingredients. No proprietary blends. No artificial dyes.
Manufactured in the USA and independently tested and certified for content accuracy, purity, and freedom from contaminants. We go above and beyond so you can trust what’s inside.
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 beneficialthan taking either myo-inositol or D-chiro-inositol alone, and more beneficial than other inositol ratios
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Backed by Science
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Premium Ingredients
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Independently Tested & Certified
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Trusted by Providers& Patients
Exceptional Ingredients.
Without exception
There's nothing easyabout being exceptional.We carefully source eachingredient for ourproducts, and only thebest make the cut
Certified Pure.
Products you can trust
Not all supplements arecreated equal. Our productsare put to the test by anindependent third party,NSF International, to certifycontent accuracy and purity.
* Nordio and Proietti. Eur Rev Med Phamacol Sci. 2012; 16:575-81.: Colazingari et al. Arch Gynecol Obstet. 2013; 288:1405-11.
† Ovasitol was last tested and certified by NSF International in 2025.
‡ The Theralogix Medical Advisory Board (MAB) is a group within Theralogix which approves all formulations; the MAB is not an external organization and there are no certifications given out by the MAB.
Frequently Asked Questions
What is inositol?
What is inositol?
Inositol is a nutrient found in fruits, beans, grains, and nuts, and it’s also made naturally by the body. Research shows that myo-inositol and d-chiro-inositol may support improved metabolic factors, normal menstrual cycles, fertility, egg quality, and in-vitro fertilization (IVF) outcomes in women with PCOS.
How is Ovasitol different than other inositol supplements?
How is Ovasitol different than other inositol supplements?
Ovasitol is a 100% pure inositol powder supplement. It contains only myo-inositol and D-chiro-inositol in the body’s naturally occurring ratio of 40 to 1. 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. Ovasitol is the first and only 40:1 inositol supplement that’s independently tested and certified by NSF® International, so you know exactly what you’re getting. Ovasitol is an unflavored powder, so it delivers a research-backed dose of inositol without capsules and mixes seamlessly into any hot or cold non-carbonated beverage.
Who is likely to benefit from Ovasitol?
Who is likely to benefit from Ovasitol?
Women with PCOS trying to support normal menstrual cycles, improved metabolic factors, egg quality, and fertility would likely benefit from Ovasitol. Women trying to conceive should take Ovasitol along with a preconception prenatal supplement, such as TheraNatal Core or TheraNatal OvaVite.
How long should I take Ovasitol?
How long should I take Ovasitol?
Ovasitol is designed for continuous, long-term use. It generally takes at least three months of regular, daily use to notice menstrual benefits and at least 6 months of regular, daily use to notice skin and hair benefits. If you’re taking Ovasitol to promote healthy egg quality, take consistently for at least six weeks. Be sure to follow your healthcare provider’s recommendations.
Can I continue to take Ovasitol during pregnancy?
Can I continue to take Ovasitol during pregnancy?
Research shows that myo-inositol and D-chiro-inositol are safe and can offer benefits during pregnancy. However, we recommend consulting with your healthcare provider prior to use if you are pregnant.
Can I continue to take Ovasitol while breastfeeding?
Can I continue to take Ovasitol while breastfeeding?
Breast milk is a natural source of inositol, and inositol is added to many infant formulas. While there are no known safety concerns with taking inositol while breastfeeding, there are currently no clinical trials that test inositol in women during lactation. Please check with your healthcare provider about whether to take Ovasitol while breastfeeding.
Are there any side effects from Ovasitol?
Are there any side effects from Ovasitol?
No. There are no expected side effects from Ovasitol. Studies have shown that inositol is safe and well-tolerated when taken at the typical recommended dose of 4,000 mg a day.
Can I take Ovasitol with other nutritional supplements?
Can I take Ovasitol with other nutritional supplements?
Yes. You can take Ovasitol with most other dietary supplements.
Can I take Ovasitol with prescription medications?
Can I take Ovasitol with prescription medications?
Ovasitol can be safely taken along with most prescription medications, including birth control. As with any dietary supplement, discuss with your pharmacist and/or healthcare team to determine whether Ovasitol can be taken along with your medications. If you are considering Ovasitol and have a prescription to manage your blood sugar, please check with your healthcare provider. If you take thyroid medication, separate from Ovasitol by at least one hour.