Grapefruit can lower blood sugar: first of all, grapefruit is low in calories, the glycemic index is also relatively low, eating grapefruit does not make the blood sugar level in the body rise significantly, so patients with high blood sugar can eat grapefruit. Secondly, grapefruit is rich in vitamin C and insulin-like substances, which can help the body lower blood sugar. Regular consumption of grapefruit can play a supplementary treatment of high blood sugar disease. Finally, grapefruit is also rich in fiber and trace elements, which can help to strengthen the stomach and lungs. It can also help the body laxative and promote effective metabolism. The accelerated metabolic rate will also help the body consume some of the blood sugar, effectively alleviating some of the adverse symptoms caused by high blood sugar, which has a positive effect on stabilizing blood sugar. Grapefruit has the effect of lowering blood sugar, stabilizing blood sugar and controlling blood sugar.