According to market survey and analysis, at present, China has the largest number of malnourished people in the world. Malnutrition includes undernutrition and overnutrition, among which overnutrition in restaurants is the most harmful to China residents. Overnutrition means that energy intake exceeds human consumption, which will cause harm to human body. In 2006, the "Survey on Nutrition and Health Status of Residents in China" jointly conducted by the Ministry of Health, the Ministry of Science and Technology and the National Bureau of Statistics showed that the prevalence rate of hypertension among residents over 8 years old in China was18.8%; The prevalence rate of diabetes is 2.6%; The prevalence of dyslipidemia was 65438 08.6%. The overweight rate of adults is 22.8%; The obesity rate was 7. 1%. Compared with 199 1 year, the incidence of hypertension increased by 3 1%. The obesity rate increased by 97.2%. These data cannot but attract the attention of the national government and relevant departments. When analyzing the causes of this "sinister" situation, experts said: "Unreasonable nutrition and unhealthy lifestyle are not the only factors that cause chronic diseases, but at least they are one of the important factors." Generally speaking, it is three words-"I don't eat." So how to eat is reasonable and scientific? Please look at the following: human health must have reasonable nutrition, and reasonable nutrition is achieved through a balanced diet. Balanced diet refers to establishing a balance between dietary nutrient supply and physiological needs of the body at the same time, including the types and quantities of heat energy and various nutrients in the diet, which fully meets the nutrient supply standards; The proportion of various nutrients is appropriate to establish a physiological balance. Namely: amino acid balance, calorie and nutrient balance, acid-base balance and the balance between various nutrients. Food should be diversified; Hunger and satiety should be appropriate; Grease should be appropriate; Coarse and fine grains should be matched; Salt should be limited; Eat less sweets; Drink moderately; Three meals should be reasonable. In particular, people with acid-base imbalance are prone to get sick, and the prevalence rate of people with acidic constitution is higher than that of people with alkaline constitution. People with acidic constitution often feel tired, memory loss, inattention, backache and leg pain, but they can't find anything wrong when they go to the hospital for examination. If you don't pay attention to improvement, it will continue to develop into a disease. It is an acidic food. Including pigs, beef, brown rice, noodles, fish, shrimp, sugar, beer and so on. All foods containing metal elements such as calcium, sodium, potassium and magnesium are alkaline after metabolism in the body, including kelp, soybeans, tomatoes, potatoes, milk and apples. The pH of food should be reasonably adjusted according to the pH of food in the diet. According to different age groups, different occupations, seasonal changes in the environment and physiological and psychological needs, it varies from place to place, from time to time and from person to person to achieve targeted nutrition. Only in this way, when the dead wood meets the spring, can the disease be cured and health last forever.