While weight loss is not necessary for women with PCOS to improve their condition, losing weight can benefit the hormonal imbalances and insulin resistance that are characteristic of PCOS. As little as a 5% reduction in weight has been shown to improve insulin resistance and menstrual function in women with PCOS.[1] Weight loss can be achieved through lifestyle modifications such as diet and exercise, both of which can also improve insulin resistance and hormone levels independent of weight loss.[2][3][4]