Protocol · Women's Health
Polycystic Ovary Syndrome (PCOS) Protocol
Inositol (Myo-inositol + D-chiro-inositol) and Berberine are the core of this stack, with 5 supporting supplements. Each row gives the amount the protocol lists and the grade our evidence database holds for that supplement in Polycystic Ovary Syndrome (PCOS).
We are re-verifying the studies cited on protocol pages; only confirmed citations are shown.
The stack
7 supplements · 7 graded · 1 confirmed study
| Grade | Supplement | Amount listed | Why it’s in the stack | Evidence on file | Shop |
|---|---|---|---|---|---|
| Primary stackThe core of this protocol | |||||
| Inositol (Myo-inositol + D-chiro-inositol) | Amount listed: 2–4 g myo-inositol + 50–100 mg D-chiro-inositol daily (40:1 ratio) | Acts as insulin signaling second messenger, improving insulin sensitivity, restoring ovulation, and reducing androgens
| Grade B for Blood glucose2 studies · 131 people | ||
Confirmed studies for Inositol (Myo-inositol + D-chiro-inositol) (titles as PubMed lists them) | |||||
| Berberine | Amount listed: 500 mg 2–3× daily with meals | Activates AMPK to improve insulin sensitivity, reduces androgens, and regulates menstrual cycles comparable to metformin
| Grade B for Apolipoprotein B127 people | ||
| Supporting stackListed as additions to the core | |||||
| N-Acetylcysteine (NAC) | Amount listed: 600–1,800 mg daily | Antioxidant that improves insulin sensitivity, reduces androgens, and enhances ovulation rates
| Grade B for Blood glucose869 people | ||
| Vitamin D | Amount listed: 2,000–4,000 IU daily (target 40–60 ng/mL) | Deficiency is prevalent in PCOS; supplementation improves insulin sensitivity, menstrual regularity, and fertility
| Grade C for Blood glucose2 studies · 691 people | ||
| Omega-3 Fatty Acids | Amount listed: 2–4 g EPA/DHA daily | Reduces inflammation, improves lipid profile, and may reduce androgen levels in PCOS
| Grade D for Adiponectin51 people | ||
| Chromium | Amount listed: 200–1,000 mcg daily (as chromium picolinate) | Enhances insulin receptor sensitivity, potentially improving metabolic and reproductive parameters
| Grade C for Acne Symptoms60 people | ||
| Coenzyme Q10 | Amount listed: 100–200 mg daily | Antioxidant that may improve glucose metabolism, blood pressure, and cholesterol in PCOS
| Grade C for Blood glucose3 studies · 86 people | ||
Shop the evidence-backed picks
The collection holds the supplements we grade A or B for its theme, in third-party tested products where the catalog has them. It opens in our Fullscript store. You can look through it without signing in; Fullscript asks for a free account to order.
Or shop one supplement
The 3 supplements in this protocol graded A or B. Each opens third-party tested products, matched to the dose above where we can.
- Grade B
- Grade B
- Grade B
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How this protocol works
In plain language
Polycystic ovary syndrome (PCOS) is the most common hormonal disorder in women of reproductive age, affecting 6-12% of women. It's characterized by irregular periods, excess androgen ('male hormones'), and polycystic ovaries. The underlying problem is usually insulin resistance—when your cells don't respond well to insulin, your pancreas produces more, and high insulin stimulates the ovaries to make more testosterone. This protocol targets insulin resistance and its downstream hormonal effects.
- Inositol is the most evidence-based supplement for PCOS. Myo-inositol and D-chiro-inositol are naturally occurring compounds that act as 'second messengers' in insulin signaling—they help insulin work more effectively. Studies show inositol can restore ovulation, lower testosterone, improve egg quality, and reduce acne and hirsutism. The combination of myo-inositol and D-chiro-inositol in a 40:1 ratio (mimicking the body's natural ratio) appears most effective.
- Berberine is remarkably effective for PCOS—head-to-head studies show it works as well as metformin (the most commonly prescribed PCOS medication) for improving insulin sensitivity and reducing androgens. It activates AMPK, the same pathway targeted by metformin. Berberine can regulate menstrual cycles, reduce testosterone, and improve metabolic markers. Some women tolerate it better than metformin.
- N-Acetylcysteine (NAC) is a powerful antioxidant that increases glutathione, your body's master antioxidant. In PCOS, oxidative stress contributes to insulin resistance and ovarian dysfunction. NAC improves insulin sensitivity, reduces androgen levels, and may enhance ovulation rates. It's been studied as an alternative to metformin with comparable results in some trials.
- Vitamin D deficiency is extremely common in PCOS (67-85% of women) and correlates with worse insulin resistance and metabolic profiles. Supplementation can improve insulin sensitivity, reduce inflammation, and may improve menstrual regularity and fertility. Get your levels tested and aim for 40-60 ng/mL.
- Omega-3 Fatty Acids reduce the chronic low-grade inflammation seen in PCOS and improve lipid profiles. They may also have modest effects on reducing androgens and improving insulin sensitivity.
- Chromium enhances insulin receptor function, and some studies show it can improve glucose tolerance and reduce testosterone in PCOS. Effects are modest but may complement other interventions.
- Coenzyme Q10 is an antioxidant that may improve various metabolic parameters in PCOS, including glucose metabolism and lipid profiles.
Expected timeline: Metabolic improvements (fasting glucose, insulin) may be seen in 4-8 weeks. Menstrual regularity often improves within 2-3 cycles (2-3 months). Improvements in acne and hirsutism take longer (3-6 months). Weight loss and lifestyle changes enhance all supplement effects.