With the development of society, more and more people live a long and healthy life. It is estimated that by the year 2000, the world's elderly will account for 20% of the total population. Is there a relationship between nutrition and longevity? The answer is yes. Although only by comprehensively coordinating various factors can we live a long life, paying attention to nutrition is indeed an important aspect of supporting a person's life. There are "I am addicted to tobacco and alcohol" (quit smoking and avoid alcohol) and "indifferent beet" (light vegetarian diet) in the song of longevity for ten years, which is a good proof.

Human aging is a natural law in the process of life. According to gerontology, 45 years old is the demarcation period of life. It is mature before the age of 45, and it begins to enter the pre-old age after 45, and it really enters the old age after 65. As soon as we enter old age, people's various physiological functions will gradually decline, and there will be gray temples, deafness, dizziness, muscle weakness, increased wrinkles, backache, stumbling, decreased resistance, frequent diseases and so on. This is an inevitable process of life. There is no magic medicine in the world that can make people live forever, but being good at health preservation and perseverance can delay the arrival of aging and achieve the purpose of prolonging life.

Being old and weak does not mean that the elderly need less nutrition. On the contrary, a balanced diet for the elderly is more important. First of all, the elderly should keep a proper weight. The elderly with ideal weight have the lowest prevalence of various diseases. Due to the decline of basal metabolic rate, the physical activity of the elderly is obviously reduced, and the daily energy demand is lower than that of the middle-aged people. The energy supply of the elderly is closely related to their weight. Overweight, especially obese people are prone to hypertension, hyperlipidemia, coronary heart disease and stroke. Low weight, especially emaciation, is prone to respiratory diseases such as chronic bronchitis and pulmonary heart disease due to insufficient nutrition and low immunity. Therefore, we should pay attention to regulating calorie intake and maintaining an ideal weight.

With the increase of age, many degenerative diseases are gradually increasing. In many countries and regions, heart disease is the "first killer" endangering human life, and its cause is that the coronary artery supplying blood to the heart is blocked due to excessive fat accumulation in the body. So, how to prevent heart disease? The most painless and simple way is to eat less high-fat foods, especially foods containing animal fat (except fish and poultry); The intake of energy and salt should also be limited; Adequate supply of protein; Appropriate supplementation of some vitamins and trace elements.

Osteoporosis is one of the reasons why the elderly are prone to femoral neck fracture. Therefore, we should pay attention to calcium supplementation in diet, especially milk and dairy products. Vegetables and beans, especially soybeans, sesame paste, melon seeds, Nostoc flagelliforme, kelp, shrimp and so on, contain high calcium. When an organism is oxidized, it can produce chemically active groups, which are called free radicals. It can cause lipid peroxidation of cell biofilm, destroy biofilm, and lead to cell pathological changes and even death. Free radicals are an important cause of human aging and even diseases such as cancer and cardiovascular diseases. Food contains antioxidants, including vitamin A and carotene, vitamin E, vitamin C, selenium, cysteine and so on. You can choose foods rich in these nutrients.

Longevity is everyone's good wish. Follow the way of keeping in good health and wish the old people a long life together.