INS and polycystic ovary syndrome: The difference is that low‐calorie combined with low‐carbohydrate diets can directly reduce BMI values and insulin levels, and can also improve pregnancy outcomes; low‐calorie combined with extract diets cannot reduce BMI values but can reduce body weight, WC, HC, and WHR values, effectively playing a role in weight reduction and shaping, especially in reducing FAI values and improving hyperandrogenemia, which is the biggest difference from other dietary approaches.