Clinical research has found that Chromium supplements may have metabolic health benefits for women with Polycystic ovary syndrome (PCOS).
Polycystic ovary syndrome or PCOS is the most common endocrine-metabolic disorder in women of reproductive age.
The diagnosis of PCOS must be based on the presence of at least two of the following three criteria: chronic anovulation, hyperandrogenism (clinical or biological), and polycystic ovaries.
Numerous studies have now found that Insulin Resistance (IR) plays a key role in the pathophysiology of PCOS.
Insulin resistance (IR) is a condition in which the body’s cells become resistant to the effects of insulin.
There are a number of dietary/lifestyle interventions and nutritional supplements which may be of benefit in treating components of PCOS, one of these is Chromium and its ability to reduce Insulin Resistance.
Chromium (Cr) is an essential trace element which plays a role in carbohydrate, lipid, and protein metabolism by potentiating insulin action.
Studies show that people with type 2 diabetes have lower blood levels of chromium than those without the disease. 
Chromium Supplements, PCOS & Insulin Resistance
A systematic review and meta-analysis published in 2017 assessed the effect of Chromium (Cr) supplementation in PCOS.
The systematic review and meta-analysis concluded:
This systematic review and meta-analysis shows that using Cr picolinate supplementation has beneficial effects on decreasing BMI, fasting insulin and free testosterone in PCOS patients. 
A double-blind, randomized controlled trial published in 2016 investigated the effect of chromium picolinate (CrP) on insulin resistance (IR) in polycystic ovary syn-drome (PCOS).
The study concluded:
Chromium picolinate is useful in PCOS to reduce IR and stimulate ovulation. 
The information in this article has not been evaluated by the FDA and should not be used to diagnose, cure or treat any disease, implied or otherwise.
Always consult with a qualified healthcare professional before making any significant dietary or lifestyle changes including supplements and herbs.