The Whistle Blown on the best inositol supplements to support PCOS in the USA
Researched & Posted by
Hannah Wylie
Last updated on May 05, 2025
*PCOS Informer is made up of the views and opinions of our beauty and nutrition expert Hannah Wylie. The scoring is determined at his own discretion and should not be used for accuracy purposes. We are able to provide this service for free thanks to the referral fees we receive from a number of service providers along with an ownership stake in one or more of the brands. These referral fees may affect the rankings and score assigned to specific vendors. Disclaimer: Furthermore, though many vendors appear on the PCOS Informer, this DOES NOT imply endorsement of any kind and the results of using such products may vary. The information and vendors which appear on PCOS Informer is subject to change at any time.
Which inositol supplements should you buy?
With countless differentinositolsupplements vying for your attention, how do you really know which one will actually deliver on their big promises ofregulating cycle health,improving insulin sensitivityandboosting fertility?
There are several household brands, some backed bycelebrity influencers use expensive PR and marketing to sell their productshowever if you open up the hood and look at whats underneath do the products match up to the claims they are making?
That’s why we’re here.We researched the top selling inositol supplements on the internetand made purchases to test some of 2024’s most talked about products. We combed through the scientific research.
Why do we need to take inositol for PCOS?
For women with PCOS, clinical research has shown that the ovaries are rich in D-Chiro Inositol. On the other hand, women without PCOS typically have follicular fluid rich in Myo-Inositol.
But why does this happen?
In women with PCOS, imbalanced insulin levels lead to the conversion of myo-inositol into excessive d-chiro inositol. This leads to PCOS symptoms related to cycle health: from irregular cycles, through to egg quality.
This also impacts androgen levels and related skin health and weight challenges caused by excess insulin.
Interestingly, studies have shown that supplementing a combination of D-Chiro and Myo Inositol in a 40:1 ratio proves to have significantly better results than either inositol by itself.1
Insulin response of polycystic ovary syndrome (PCOS) patients (n = 42) to oral glucose load (OGTT) in baseline conditions (□) and after 8 weeks of myo-inositol (MYO) administration
Breakouts and chronic cyctic hormonal acne
Irregular cycles and excess weight
Excess androgens and hirsutism (excess hair)
So if all we’ve got to do is take inositol why do I need to continue reading this article right? If only it were that simple…
Supporting insulin levels naturally can be extremely difficult and finding the right inositol can be extremely challenging.
Finding the right product with a therapeutic dose of natural substances to support insulin levels is key.
BEWARE:Not All Inositol Supplements Are Equal
In the course of our research, we discovered a few things the supplement industry probably wishes we’d keep under wraps. Including how:
Many inositol supplements have very little of the high-doses of nutrients you need to truly make an impact
And how many inositol supplements are not delivered in the right ratios to have the best effect on PCOS.
In fact, many of the products we researched have the potential to worsen your symptoms.
Here’s what to look for in inositol vitamins to naturally support insulin levels…
and what you MUST AVOID at all costs.
Our Research Backed 10-Point Approach
In addition to our ‘Must Haves’ and ‘Must Avoids’, we have a dedicated ‘Evaluations Team’ that compares and ranks each tested product according to a Research-Backed 10-Point System. We want you to know how our ranking system works:
Potentially harmful or toxic materials.
Ingredient quality and ability to affect insulin levels.
Regulated manufacturing protocols and facilities.
Absorption of ingredients.
The research and development of the key ingredient's impact on insulin.
Cost analysis.
Country of origin. Made in the USA.
Returns policy and money back guarantee.
Customer satisfaction. Differentiating between real and fake customer reviews.
