Myo-inositol and D-chiro-inositol for PCOS

By Margaret Eich, MS, RDN

In honor of PCOS Awareness Month, we’re sharing some of our best tips for managing PCOS with diet, lifestyle, and supplements. We love working with clients with PCOS, because there is so much you can do by changing your habits to positively impact PCOS. A PCOS diagnosis is based on the Rotterdam criteria, which includes 1) irregular menstrual cycles with absent or irregular ovulation, 2) cysts on the ovaries, 3) elevated androgen levels. Two of these 3 characteristics must be present for a diagnosis of PCOS. 

Another common characteristic of women with PCOS is insulin resistance with 60-75% of women with PCOS have insulin resistance regardless of body weight. When you have insulin resistance, your insulin isn’t working as effectively as it should to get glucose out of your blood and into the cells of your body to be used for energy. The pancreas compensates by pumping out more insulin. These elevated insulin levels seem to be at the root of the elevated androgen/testosterone levels commonly found in women with PCOS. Thus addressing the insulin resistance in PCOS may help lower insulin and testosterone levels and improve menstrual cycle regularity. You can read more about managing insulin resistance here.

So this is where inositol comes in as a really helpful supplement. Inositol is a nutrient found in beans, grains, fruit, and nuts that research has shown to be beneficial for PCOS. There are 9 different forms of inositol, but two forms have been shown to be beneficial for PCOS. These are myo-inositol and D-chiro-inositol.  Myo-inositol in combination with D-chiro-inositol may help lower insulin and testosterone levels and increase menstrual cycle regularity in women with PCOS making it a very helpful tool in your PCOS management strategy. The body’s normal ratio of myo-inositol to D-chiro-inositol is 40:1, and a recent study has shown that this is the most effective ratio in supplemental form for restoring ovulation in PCOS. At Pulling Down the Moon, we carry Ovasitol, which contains the recommended 40:1 ratio of myo-inositol to D-chiro-inositol.

Beyond PCOS, myo-inositol also may improve egg quality and may reduce risk for gestational diabetes when taken during pregnancy. Book a nutrition appointment today to further discuss ways to help manage your PCOS!

 

Reference: Nordio M, Basciani S, Camajani E. The 40:1 myo-inositol/D-chiro-inositol plasma ratio is able to restore ovulation in PCOS: comparison to other ratios. Eur Rev Med Pharm Sci. 2019;23:5512-5521.

 

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