Eating grapefruit can prevent blood sugar from rising, but this statement lacks scientific basis. But grapefruit is a suitable fruit for diabetics. Although the sugar content of grapefruit is not high, it still contains carbohydrates. As long as it is eaten, it will be digested and absorbed, which will increase blood sugar without lowering blood sugar. The good news is that grapefruit has little effect on blood sugar. People with diabetes can't eat more, but they can eat in moderation.

What food is suitable for diabetics depends on two indicators, one is glycemic index, and the other is glycemic load index.

GI reflects the glycemic index and the ability of food to raise blood sugar. The glycemic index is 100. Compared with glucose, the glycemic index is greater than 70, which is a high-sugar food. The glycemic index is between 55 and 70, so it is called the food with medium glycemic index. A glycemic index below 55 is a low-sugar food.

GL refers to the pressure of food on the increase of blood sugar. The calculation method is to multiply the total carbohydrate in food by the glycemic index of food and then divide it by 100. A blood sugar load below 10 belongs to hypoglycemia load, a blood sugar load from 10 to 20 belongs to middle blood sugar load, and a blood sugar load above 20 belongs to hyperglycemia load.

The glycemic index of grapefruit is only 25, which is a food with little influence on blood sugar, and the blood sugar will not rise rapidly after eating. The sugar content of grapefruit is 5~7%, which is relatively low in fruits. Calculated by 7%, the blood sugar content of 100g grapefruit is 25*7/ 100= 1.75, which has little pressure on blood sugar.

Grapefruit is low in fat, calories, sugar, glycemic index and sugar content. After being eaten by diabetics, grapefruit can not only supplement enough water, water-soluble vitamins, minerals and trace elements, but also raise blood sugar steadily. Therefore, grapefruit is an excellent choice for diabetics. But remember: it should be taken in moderation, and it should not be taken at the same time as medicine. Grapefruit fruits all contain a substance called furan coumarin. If you take medicine while eating grapefruit, it is likely to have other harmful effects.