Beef, mutton and pork are usually called red meat, while fish and poultry are called white meat. Red meat is characterized by coarse and hard muscle fibers and high fat content, while white meat has fine muscle fibers, low fat content and high unsaturated fatty acid content. Red meat and white meat have different effects on human chronic diseases. Recently, epidemiological studies have found that people who eat red meat have an increased risk of chronic diseases such as colon cancer, breast cancer and coronary heart disease, while eating white meat can reduce the risk of these diseases and prolong life. \x0d\ 1990 A large prospective study in the United States shows that the more consumers eat red meat, the higher the incidence of colon cancer. According to the intake of red meat, the relative risk of colon cancer in the highest intake group is 70% higher than that in the lowest intake group. Compared with men who eat red meat more than 5 times a week and men who eat red meat less than/kloc-0 times a month, the relative risk of colon cancer in the former is 2.57 times higher. On the contrary, people who eat more dairy products, poultry and vegetable fats have a lower risk of intestinal cancer. \x0d\ Another American study shows that women who often eat red meat are at greater risk of breast cancer than women who often eat chicken, fish and vegetables. A study on 1985 to 199 1 women shows that women who eat more red meat have a higher risk of breast cancer than women who eat less red meat. \x0d\ Crete, Greece in the Mediterranean region and Saka people in southern Italy were the regions with the lowest incidence of chronic diseases and the longest life span in the world in the 1960s. The survey found that there is almost no red meat in the traditional Mediterranean diet. A survey in the United States found that Crete people only ate red meat 1-2 times a week in the 1960s, while eating other animal foods (milk and poultry) more than red meat. \x0d\ It can be seen that "four birds in the sky are not as good as half a catty of animals on the ground" is in line with the new concept of modern nutrition. For health, I suggest you eat more white meat and less red meat.