It is certain that middle-aged and elderly people want to live a long and healthy life. Generally speaking, proper physical exercise is also very important, such as Qigong [Taiji Chuan, Taiji Sword, etc. Both martial arts and qigong], jogging, mountain climbing, swimming, etc. People are different. If you are sick, don't eat supplements and health products indiscriminately, especially calcium supplementation and melatonin. You can ask me. ], will be harmful to the human body. I will focus on diet today. An American biologist once experimented with mice. The normal life span of mice is only three years, and mice will die of cancer, hypertension, diabetes and leukemia when they are old. Biologists divide mice into two groups and feed them the same food. The first group does not limit the amount of food, and makes up immediately after eating. In the second group, the mice were restricted to eat, so that they had food every day, but they were not full, and they were in a state of semi-starvation for a long time. Finally, I was surprised to find that the first group of mice died one after another in about three years. The shortest life span of the second group of mice reached four years, the longest life span exceeded five years, and the average life span was 50% higher than that of the first group! This gives us an inspiration: people's good health and long life are determined by many aspects, among which the essential aspect is to stay hungry every day, control your mouth, limit your food intake, and don't eat too much every meal, not to mention taking the road of food death [high protein and high fat]. I am 59 years old. I usually pay attention to my diet. I have porridge and side dishes for breakfast. Usually eat meat, but not much. Although I drink three or two liquors at night all the year round, my blood pressure, blood lipid and blood sugar are normal in the physical examination organized by the unit every year. In my opinion, as long as you exercise properly, you feel hungry every day. What kind of hypertension, diabetes and cancer can only be legends. Did you say eat? What else don't you understand [why are calcium supplementation and melatonin supplementation scams? ] Come and ask me.