Sugar-free soymilk does not have a high glycemic index. A glycemic index of 70 or more is a high glycemic index, less than 55 is a low glycemic index, and the glycemic index of unsweetened soymilk is about 20, so unsweetened soymilk belongs to the low glycemic index food. Sugar-free soymilk generally refers to soymilk without added sucrose, but most soymilk is polished from soybeans and black beans, and every 100 grams of soybeans contains 18.7 grams of carbohydrates, so even sugar-free soymilk contains a small amount of sugar, and there may be a slight elevation of blood glucose after drinking it. Soymilk is rich in vegetable protein, vitamins and trace elements, which can supplement the nutrients needed by the body. If you have diabetic nephropathy accompanied by edema, you should try to drink less soy milk to avoid increasing the burden on the kidneys and aggravating the condition. More food health knowledge, you can consult a nutritionist, under the guidance of the doctor scientific and reasonable consumption.