Vitamins and minerals are essential nutrients for the human body; vitamin A promotes the synthesis of glycoproteins, and the proteins on the surface of cell membranes are mainly glycoproteins, and immunoglobulins are also glycoproteins. Today’s urbanites are reluctant to eat pig liver, which is rich in vitamins, vitamin A intake is insufficient, the respiratory epithelium lacks resistance, often prone to disease. The human body can not synthesize vitamins and minerals, and vitamin C, B and iron are particularly important to the human body, so every day should be properly supplemented with multivitamin tablets; in addition to the trace elements of zinc, selenium, vitamin B1, B2, and a variety of other elements related to the body’s non-specific immune function. Sub-healthy dietary considerations: 1, supplemental vitamin A: long hours in front of the computer work will appear in mental depression, blurred vision and other computer syndrome, this is because the body vitamin A consumption is more, resulting in a nutritional imbalance. Therefore, it is best to take a capsule of vitamin A every day. 2, drink more tea: drinking tea can reduce computer radiation. Tea is best not to use insulation cups, insulation cups to the tea leaves for a long time immersed in high-temperature water, as with warm water decoction, will make the tea vitamins all destroyed. 3, bananas to promote brain function: bananas can help the brain to create a chemical component – serotonin, this substance can stimulate the nervous system, to promote the function of the brain is very good. 4, eat fruit before work: a fruit in the breakfast can add a lot of vitamins, but also can promote the digestive system. But eating fruit is also a good idea, before and after meals should not eat the most fruit is watermelon. 5, moderate drinking: 20-30 ml of red wine every day, you can reduce the incidence of heart disease by 75%, and excessive drinking beer will accelerate the aging of the heart muscle, so that the amount of lead in the blood increased, so it is better to drink less. 6, eat more food can stabilize mood: calcium has the role of stabilizing mood, grumpy people should resort to milk, yogurt, cheese and other dairy products, as well as fish, liver, bone broth and other calcium-containing foods to calm the mind. When feeling great psychological pressure, the body’s consumption of vitamin C will increase significantly. Therefore, nervous people can eat more fresh oranges, kiwis, etc., to supplement enough vitamin C. 7, fatigue after eating more alkaline food: fatigue, should not eat chicken, fish, meat, eggs, etc., because fatigue in the body of the accumulation of acidic substances, and meat food belongs to the acidic, which will aggravate the feeling of fatigue. On the contrary, fresh vegetables, aquatic products and other alkaline food can enable people to quickly restore physical strength. 8, drink at least 3 cups of water every day: early in the morning, drink a cup of honey water on an empty stomach. Honey has the effect of moisturizing the throat, clearing the lungs, generating fluids, warming the stomach and sliding the intestines. After lunch break, drink a cup of light tea water. Tea has the effect of waking up and refreshing the mind, moisturizing the lungs and generating fluids, and quenching thirst and diuresis. Before going to bed at night, a cup of plain water can help digestion, improve circulation, increase detoxification and excretion capacity, and strengthen immune function. In addition to 3 glasses of water a day, you should drink more plain water in your daily life. Drinking more water appropriately is a basic measure to prevent diseases.