Vitamins, one of the great discoveries of19th century, came from 1897. In a research survey on beriberi, Aikman, a Dutch expert, found that it was easier to get beriberi if he often ate refined rice. It must be noted that beriberi and beriberi are two different things, and beriberi is manifested in central nervous system diseases and chronic heart failure. Then Aikman carried out follow-up and found that the total number of people who often ate chaff relatively got beriberi decreased. After some scientific research, it was finally found that there were a few certain nutritional elements in the chaff. Because of this discovery, Aikman finally won the Nobel Prize in Physiology or Medicine in 1929.
Although vitamins have many functions, they are not omnipotent, because vitamins can't be produced independently in the human body, and they must be taken in daily food. Generally speaking, as long as the nutrition is matched, it is not easy to have vitamin deficiency, and there is no need to intentionally fill certain vitamins. However, in recent years, with the promotion of the concept of health preservation, more and more people gradually buy their own vitamins to take, feeling that this can make the human body more physically and mentally healthy. But I don't know that blindly supplementing vitamins is not only unnecessary, but also may damage kidney function, which must be highly valued!
Four vitamins, don't eat blindly as health products: First, vitamin A plays a key role in vision development and the growth and development of human immune system. The daily necessary supply for adults is A700~800μgrae/d, and raw eggs, kidneys and other foods all contain vitamin A in daily diet.
In addition, carotene contained in broccoli, carrots and other vegetables and fruits can also be converted into vitamin A in the body, which can easily meet the requirements of the human body for vitamin A in the case of nutritional collocation. However, blindly supplementing vitamin A may cause a series of adverse reactions. Scientific and technological personnel have done a test and found that "vitamin A aldehyde ester" appeared in the blood of elderly people who took vitamin A excessively. This is a harmful substance, which can damage the function of liver and kidney, and can also cause skin diseases, joint pain, headache and so on. In addition, if pregnant mothers take too much vitamin A, it is very likely to cause malformed fetuses.
Second, vitamin B has the functions of promoting growth and development, metabolism, maintaining neuromuscular function and promoting absorption and digestion. It is mainly found in animal viscera, egg yolk and its grain embryo bud, and it is generally unnecessary to supplement vitamin B when the diet is balanced. If it is over-filled, it can cause many adverse reactions, such as bloating, abdominal pain, nausea and vomiting, etc., which can cause gastritis when it is obvious. In addition, excessive vitamin B supplementation can also improve the pressure of renal function and endanger the physical and mental health of the liver.
Third, vitamin D can promote the digestion and absorption of calcium and phosphorus, and promote the development of bones. It exists in protein food, eggs, lean pork, fish, cereals, milk and other foods. Excessive use of vitamin D can lead to poisoning, abdominal pain, diarrhea, nausea, nausea, etc., and can also cause emotional irritability, leading to syncope and always wanting to sleep, in addition to soft tissue calcification.
Fourth, vitamin E has an antioxidant effect, which can slow down skin aging, improve men's sperm quality and improve reproductive function. Vitamin E can be supplemented according to nuts, vegetables and fruits, fresh fruits, such as pumpkin seeds, cashew kernel, red beans, black beans, Chinese cabbage, spinach, broccoli and mango. However, if it is filled in excess, it can cause chapped lips, physical fatigue, dizziness, headache, loss of appetite, etc., and it can also cause allergies, measles, increased blood pressure and thrombosis.