If you’ve got PCOS, irregular cycles, or you’ve been down the hormonal-balance rabbit hole online, you’ve almost certainly seen the word inositol. It’s one of the few supplements in the women’s-health space that actually has real research behind it, and it comes up in my DMs constantly. So let me break down Femositol by Triquetra — what it is, why the ratio on the label matters more than most people realize, and who it’s actually for.

What Inositol Even Is

Inositol is a compound your body makes and uses to help your cells respond to insulin and to keep certain hormone signals running smoothly. There are two forms that matter here: myo-inositol and D-chiro-inositol. Your ovaries and your metabolism both rely on these, and in conditions like PCOS the balance between them tends to get thrown off — which is a big part of why cycles get irregular and insulin gets stubborn.

The short version: inositol helps your body use insulin better, and better insulin signaling tends to mean better hormone balance downstream.

Why the 40:1 Ratio Is the Whole Point

This is the part I really want you to catch. Not all inositol products are the same, and the number that matters is the ratio of myo-inositol to D-chiro-inositol.

Femositol uses a 40:1 ratio — 2,000 mg of myo-inositol to 50 mg of D-chiro-inositol per serving. That’s not a random marketing number. 40:1 is the ratio your body naturally maintains in the bloodstream, and it’s the ratio that’s been studied in PCOS research for supporting ovulation and hormonal balance. Products that use too much D-chiro-inositol can actually work against you. So when someone asks me “which inositol should I get,” the first thing I look at isn’t the brand — it’s whether they nailed the 40:1. Femositol does.

What It’s Meant to Support

Based on the research on this ratio and the way Triquetra positions it, Femositol is aimed at supporting:

• A healthy, more regular menstrual cycle
• Ovarian health and fertility
• Insulin sensitivity and metabolic wellness
• The downstream stuff women with PCOS care about — skin, unwanted hair growth, weight management

It’s marketed toward women looking for natural hormonal support, and that’s the lane it’s designed for.

How to Take It

Three capsules daily gets you the full 2,000 mg myo / 50 mg D-chiro serving. One bottle is 30 servings. It also comes as a powder if you’d rather mix it into water or a drink — some people find that easier than three capsules, and the powder is basically flavorless.

A realistic note on timeline: inositol is not an overnight thing. The research generally looks at around 3 months of consistent daily use before judging cycle and hormonal effects, so give it a real runway.

The Honest Version

Straight talk, like always. Inositol has genuinely encouraging research behind it — more than most supplements in this category — but Femositol is a supplement, not a treatment for PCOS or any diagnosed condition. If you have PCOS, are trying to conceive, or are on medication like metformin or birth control, this is absolutely one to talk through with your doctor first, because inositol works on some of the same pathways and your provider should be in the loop. It’s support, not a substitute for real medical care.

Who’s it for? Women dealing with irregular cycles or PCOS-type symptoms who want to add something with actual evidence behind it, folks focused on the insulin side of hormonal health, and anyone who’s tried a random inositol off the shelf and wants to make sure they’re getting the clinically studied 40:1 ratio instead of guessing.

As always, I’m a pharmacist, not your pharmacist — check with your own provider before starting something new, especially if you’re pregnant, trying to conceive, or managing a health condition.

This post reflects my opinion as a pharmacist and is for educational purposes only. It is not medical advice, and these statements have not been evaluated by the FDA. This product is not intended to diagnose, treat, cure, or prevent any disease. I partner with Triquetra and may earn a commission from products I recommend.

Sources & Further Reading

• Nordio M, et al. “The 40:1 myo-inositol/D-chiro-inositol plasma ratio is able to restore ovulation in PCOS patients: comparison with other ratios.” European Review for Medical and Pharmacological Sciences. https://www.europeanreview.org/article/18223
• “Update on the combination of myo-inositol/D-chiro-inositol for the treatment of polycystic ovary syndrome.” Gynecological Endocrinology (Taylor & Francis). https://www.tandfonline.com/doi/full/10.1080/09513590.2023.2301554
• “The Effects of Myo-Inositol and D-Chiro-Inositol in a Ratio 40:1 on Hormonal and Metabolic Profile in Women with PCOS.” Gynecologic and Obstetric Investigation (Karger). https://karger.com/goi/article/89/2/131/894857
• Triquetra Health — Femositol Capsules (Inositol Complex). https://triquetrahealth.com/products/femositol-capsules-inositol-complex
• Triquetra Health — Femositol Powder (Inositol Complex). https://triquetrahealth.com/products/femositol-powder-inositol-complex