Food nutrition is the material basis of human growth and metabolism, which is more important for middle-aged and elderly people. It is a material condition to provide physical resistance and fight against diseases. When people enter old age, the cell vitality decreases, the catabolic rate exceeds that of anabolism, the tissues and organs age, and the digestion and absorption function decreases. Most of the body is not as good as before, and needs enough nutrition to repair and restore various tissues and organs and maintain physiological functions.

The food for the elderly should be rich in chondroitin sulfate and high-quality protein. The structural characteristics of fish protein are easy to be absorbed by the human body and the amino acids are also very comprehensive. Marine fish is rich in eicosapentaenoic acid and docosahexaenoic acid, which has antithrombotic and blood flow promoting effects and is very beneficial to the prevention and treatment of cardiovascular diseases. Besides soft-shelled turtle, mullet, eel, crucian carp, mandarin fish, eel, loach and other fish, there are also sea cucumber, bird's nest, sesame, tofu and its products, animal fat kidney, ginseng food, marine mollusk, all kinds of milk and dairy products, soy milk powder and so on, which have good nutritional value. Drink some nourishing medicated wine or wine, fruit wine, etc. Moderate amounts are also good for health. Broth, bone soup and chicken soup can all be properly matched in daily diet. Vegetable oil is rich in unsaturated fatty acids that cannot be synthesized by human body itself, and it is an essential fatty acid for human body. The ratio of monounsaturated fatty acid to polyunsaturated fatty acid is the key to comprehensively measure the nutritional value of oil, so the elderly should eat more vegetable oil and less animal fat to prevent the formation of hyperlipidemia.

Because of the change of cell basic metabolism, the skin of the elderly gradually becomes rough, loses moisture and decreases elasticity. People are getting old, their skin is wrinkled, their skin color turns from white to black, and there are different degrees of senile plaques. To change this image, it is useless to rely on makeup crystals, but it will bring harm to the skin, and some people will also have allergic skin diseases. There are many traditional beauty care methods in China, and it is one of the effective methods to promote skin bodybuilding through diet adjustment. The same characteristics of bodybuilding foods are that most of them are rich in vitamin E, vitamin C, turtle element A, vitamin P and so on. These substances can prevent and delay skin pigmentation and cortical oxidation, and maintain skin moisture and elasticity. Vitamin E mainly comes from vegetable oil, vitamin C comes from vegetables and fruits, and vitamin A comes from animal food. Therefore, the elderly may wish to arrange these foods regularly in their diets.