The PCOS staple
Myo-inositol powder
The most studied form for PCOS. The powder dissolves easily and makes larger amounts easy.
Good for: Periods & PMS · Easy to take
What variations of myo-inositol exist?
A vitamin-like nutrient that helps cells respond to insulin. It's one of the better-studied supplements for PCOS. It comes in 3 forms, and they aren't all the same. Here's how they differ.
For education only. What's right for you depends on your health and your medications, so check with your provider before you start or switch. Book a consult
Our top pick
Every form, in plain words
The PCOS staple
Myo-inositol powder
The most studied form for PCOS. The powder dissolves easily and makes larger amounts easy.
Good for: Periods & PMS · Easy to take
The 40-to-1 combo
Myo-inositol plus D-chiro-inositol (40:1)
Matches the ratio used in many PCOS studies.
Good for: Periods & PMS
Usually skip
- The solo D-chiro (D-chiro-inositol on its own)Less research, and high amounts on their own may not help the ovaries.
Spotting a good one on the shelf
Look for
- Look for 'Myo-inositol powder' on the label (the PCOS staple)
Watch out for
- Products that don't say which form of inositol is inside
- Capsules that give only a small share of the amounts used in studies
Check with your provider first if…
- Pregnancy or trying to conceive. It's studied in pregnancy, but check with your practitioner first.
- Diabetes, or taking medicines that lower blood sugar
- Bipolar disorder or taking lithium
- Can cause gas, nausea, or loose stools at higher amounts
In Dr. Lesher's store
3 products in Dr. Lesher's dispensary have myo-inositol. Here's which form, where the label says.
Check with your provider before taking any of these, especially if you're pregnant or take medications.
XYMOGEN
RelaxMax
Has powder (the PCOS staple), good for periods & PMS
500 mg per serving
Has powder (the PCOS staple), good for periods & PMS
2,000 mg per serving
Restorative Formulations
PCO Px
Has plus D-chiro-inositol (the 40-to-1 combo), good for periods & PMS
150 mg per serving
Ready to find the root cause?
Dr. Lesher is a Naturopathic Doctor who focuses on autoimmune and chronic conditions in women. Since 2020, she's helped hundreds of patients stop managing symptoms and start healing.