Used in managing polycystic ovary syndrome (PCOS), D-chiro Inositol helps improve insulin sensitivity, which can regulate menstrual cycles, reduce androgen levels, and support fertility. It plays a role in cellular signaling related to insulin action, making it beneficial for women with insulin-resistant PCOS. Some studies suggest it may also aid in improving egg quality and metabolic health. It is often included in dietary supplements targeted for hormonal balance and metabolic support in reproductive health.