With the increase of age, the digestive ability of the elderly is weakened, and the intake of various trace elements is gradually reduced. Although the content of trace elements in human body is very low, it plays an extremely important role in human life activities. It is of great significance for the elderly to supplement trace elements properly to fight aging and prevent diseases. Chromium is one of the essential trace elements in human glucose and lipid metabolism, and it is also an auxiliary factor for the normal work of insulin in the body. In addition, chromium can also repair and activate islet cells, regulate blood sugar, reduce blood lipid, prevent cardiovascular diseases and enhance immune function. 1988, China Nutrition Society listed chromium as an essential trace element in daily diet, 1989, and the US FDA recommended that the daily intake of chromium be 50-200 micrograms. Animal experiments show that the higher the concentration of chromium in serum, the longer the life span of animals. Epidemiological investigation found that the blood chromium content of long-lived elderly people is high. With the increase of age, the blood chromium concentration in human body will gradually decrease. After middle age, if blood chromium continues to decrease, it will easily lead to disorder of glucose and lipid metabolism and arteriosclerosis. After entering the old age, these pathological changes will be further strengthened, leading to the occurrence and aggravation of cardiovascular and cerebrovascular diseases and decreased immunity. Therefore, the elderly should pay attention to chromium supplementation. Food is rich in chromium, so eating more foods rich in chromium can fully meet the needs of the elderly for chromium. The elderly should eat more foods containing more chromium, such as coarse grains, wheat, peanuts, mushrooms, peppers, liver, beef, eggs, brown sugar and dairy products. In addition, tea, ginseng, ganoderma lucidum, astragalus, turtle shell and Polygonum multiflorum are rich in chromium, and the elderly can also eat some.