There is a growing demand for beauty and health care, and herbal medicine with food therapy can be the icing on the cake. Modern people attach great importance to food therapy, but it is a study to learn how to do it correctly, especially for the elderly whose health has been damaged and whose yin and yang are not in balance, how to treat or correct the lost balance through food or by using food with a small amount of medicine. First of all, according to the seasonal cold and temperature, which affects the human body differently, we should consciously choose some foods that can adapt to the season to strengthen the resistance of the body. For example, in the summer heat, easy to produce heat and fluid, more light and easy to digest things, to avoid over-eating greasy obstruction of the stomach, or often to clear the heat of the products in lieu of tea, more use of loofah, bitter gourd, watermelon and other heat-eliminating function of the category; winter is coming, can enter the lamb stew with slices, dog meat and other warm Yang products, to supplement its Yang, enhance the ability to resist cold. However, we should also follow the principle of identifying the evidence to apply tonic, according to their system bias genus. People who are in the prime of their life should not re-enter the warm tonic, and those with deficient sweat should not invest in cold moistening. Secondly, for those who are deficient after illness or some chronic diseases, the tonic can be administered according to the different deficiencies of their yin and yang qi and blood. For example, if the blood is deficient after the disease, you can use angelica and mutton ginger soup; Yang deficiency, you can attach slices, dry ginger stewed mutton, etc. According to Chinese medicine, food has certain bias properties, such as dog meat, mutton, garlic, carrots, onions, oranges, lychees, lotus seeds, walnuts, plums, chestnuts, etc. on the warm side, watermelon, cucumber, loofah, eggplant, sugar cane, etc. on the contrary. When you choose to use, do not commit the false false real precautions, so that the more partial, yin and Yang shall not be balanced. Many foods that have a cosmetic effect on the body, in addition to containing many essential vitamins and proteins, there are many essential trace elements and anti-atherosclerosis and anti-cancer substances, and the lack of some trace elements is also an important cause of cardiovascular disease and cancer. For example, vitamin A has the function of maintaining the normal growth and differentiation of epithelial cells, anti-cancer and normal immune function, and animal liver, milk, eggs, cod liver oil and carrots are rich in it; lack of zinc can lead to dwarfism, skin disease and cancer, and seafood, especially oyster, is a good source of zinc; lack of selenium is an important factor to induce cancer, and garlic contains selenium. Black fungus contains a component that can stop platelet agglutination and block the release of 5-hydroxytryptamine from activated platelets, which can play a role in reducing atherosclerosis, which has a therapeutic effect on hypertension, vascular sclerosis, and bleeding under the eyes, etc. Also, red dates, cucumbers, mushrooms, leeks, and lettuce have different degrees of anti-cancer effects. These have an important role in extending human life.