Diabetic patients can eat crabs in moderation. Crab is a low glycemic food, and controlling the amount of food consumed will have relatively little effect on the blood sugar of diabetic patients, so diabetic patients can consume crab, but the amount of food consumed should be strictly controlled. However, crabs contain high cholesterol and purines, so diabetic patients with hyperlipidemia and hyperuricemia, especially those with poor glycemic control, are advised to avoid eating crabs as much as possible. It is recommended that diabetic patients eat more fresh vegetables with low salt and low oil, which can also replenish vitamins, electrolytes and other nutrients. Diabetic patients can consult their medical professionals for specific diet types and quantities.