Polycystic ovary syndrome (PCOS) is one of the most common causes of infertility and metabolic problems among women of reproductive age. Myo inositol (MI) is administered in women with polycystic ovary syndrome (PCOS) over the last few years. It plays an important role in many metabolic pathways if the function is impact which affects the human health. Many hormonal and reproductive disorders associated with this disorder seem relieved by the supplement. The main symptom seems to be an increased androgen concentration, which in turn may contribute to different metabolic disorders which is improved in women with PCOS by supplementation of MI. Administration of MI is a safe and effective option to prevent and correct metabolic disorders in teenagers affected by PCOS. Thus, the aim of this review is to present the effectiveness of MI in the treatment for PCOS symptoms.