This **Myo-Inositol** and **D-Chiro-Inositol** powder delivers the exact 40:1 ratio studied for PCOS, hormonal balance, and insulin sensitivity — 2,000mg myo-inositol and 50mg D-chiro-inositol per scoop. That 40:1 pairing is the specific combination used in the clinical trials, and 2,000mg of myo-inositol lands right at the minimum effective dose, so a single scoop puts you at a real, studied intake rather than a token amount.
If you're taking this for ovarian or cycle support, the powder format helps — it dissolves into any non-carbonated drink and lets you adjust the scoop to your needs. Both forms play a role in how your cells respond to insulin, which is why this combination shows up in fertility and metabolic research rather than myo-inositol on its own.
The one thing to know: the label suggests one scoop daily, but many PCOS protocols use this dose twice a day, totaling 4,000mg of myo-inositol. At one scoop you're sitting at the floor of the studied range — if you're targeting insulin or fertility outcomes specifically, you'd likely want two scoops daily to reach the higher intake used in those trials.
BioStacks
Micro Ingredients
Myo & D-Chiro Inositol Powder
Powder · 1 Scoop (2.05 G Approx.) · 221 servings · $0.14/serving
Best for
Ingredients (2)
D-Chiro Inositol
100%Dose
50 mg
Target
25–100 mg
Form
—
Myo-Inositol
100%Dose
2000 mg
Target
2000–4000 mg
Form
—
Other Ingredients
No other ingredients listed
How to Take It
Take it anytime
Trials dose 2 g twice daily — split it morning and evening rather than taking it all at once.
With or without food
On the label
As a dietary supplement, adults take 1 scoop daily, mix with non-carbonated beverage, and drink.
General guidance based on the ingredients, not a substitute for the label or your doctor.
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Sources & Scoring
Nutrient data (RDA, UL, and safety thresholds) sourced from the NIH Office of Dietary Supplements and the National Academies Dietary Reference Intakes (DRI).
This is not medical advice. Consult a healthcare provider before making changes to your supplement routine.
The score analyzes what's on the label: ingredient doses vs. studied ranges, chemical forms, evidence levels, and known interactions. It does not verify label accuracy or test for contaminants — for that, look for third-party certifications like USP or NSF.