People with high blood sugar can control their blood sugar through diet, and the following foods can be consumed: First, bitter melon, bitter melon contains bitter gourd glycosides that can lower sugar, and the extract also contains a substance similar to insulin, which can lower postprandial blood sugar. Second, nori, nori in the polysaccharide can reduce pre-meal blood sugar, before meals can drink nori soup. Third, konjac, konjac contains a lot of fiber and low calories, can delay the absorption of glucose in the intestines, and glucomannan in konjac also has a very good effect on lowering blood sugar. Fourth, the fruit of grapefruit is rich in natural folic acid, research found that grapefruit has the effect of lowering blood sugar, blood lipids, grapefruit also contains substances similar to insulin, limes, citrus fruits, etc. have a certain effect on lowering blood sugar. Five, oats contain a large number of vitamin B, oats or low calorie, low sugar, low starch, high nutrition food, more oats for diabetic patients to control blood sugar has greater benefits.