Indeed, vitamins, as indispensable nutrients for the human body, are indispensable and important substances for maintaining various functions of the human body.

It is an organic compound, and most people will call it a "vitamin".

The appearance of vitamins mainly comes from 1897. Aikman, a Dutch scientist, accidentally found that eating white rice often makes him more likely to get beriberi.

It should be emphasized that beriberi and beriberi are two different things. Berberi mainly showed nervous system symptoms and heart failure.

Subsequently, Aikman found that people who often eat rice bran suffer from beriberi relatively less. After some research, it is finally found that rice bran contains a small amount of trace elements.

Because of this discovery, Aikman finally won the Nobel Prize in Physiology and Medicine with 1929.

Because vitamins cannot be synthesized by themselves in the human body, they need to be taken in daily food.

Generally speaking, as long as the nutrition is balanced, there will be no shortage of vitamins, and there is no need to deliberately supplement some vitamins.

However, in recent years, with the popularization of the concept of health preservation, more and more people began to buy their own vitamins, thinking that it would be healthier.

As everyone knows, blindly supplementing vitamins is not only unnecessary, but also may damage liver function, so we must pay special attention to it!

Four vitamins, don't blindly eat as health care products:

Vitamin A plays an important role in the development of vision and immune system. The daily intake of adults is 700 ~ 800 μ g/day. In the daily diet, eggs, liver and other foods contain vitamin A. ..

In addition, carotenoids contained in broccoli, carrots and other vegetables can also be converted into vitamin A in the body, which can easily meet the needs of the human body for vitamin A in the case of balanced nutrition.

However, blindly supplementing vitamin A may cause a series of side effects. Researchers have done an experiment and found that "vitamin A aldehyde ester" appears in the blood of elderly people who take too much vitamin A. ..

This is a harmful substance, which will damage liver and kidney, and also cause skin diseases, joint pain, headache and so on.

In addition, if pregnant women take too much vitamin A, it may lead to fetal malformation.

Vitamin B has the functions of promoting growth and metabolism, maintaining neuromuscular function and promoting digestion and absorption.

It mainly exists in animal viscera, egg yolk and grain germ, and vitamin B supplementation is generally not needed in the case of balanced diet.

Excessive supplementation can cause many side effects, such as abdominal distension, abdominal pain, nausea and vomiting. In severe cases, it can cause gastric ulcer. In addition, excessive vitamin B supplementation will also increase the burden on the kidneys and damage the health of the liver.

Vitamin D can promote the absorption of calcium and phosphorus and the growth of bones. It exists in animal liver, eggs, lean meat, fish, grains, milk and other foods.

Excessive use of vitamin D can lead to poisoning, abdominal pain, diarrhea, nausea, vomiting and other symptoms, as well as emotional irritability, even coma and lethargy, in addition to soft tissue calcification.

Vitamin E has antioxidant effect, can delay skin aging, and can also improve male sperm quality and fertility.

Vitamin E can be supplemented by dried fruits, vegetables and fruits, such as pistachios, cashews, red beans, black beans, Chinese cabbage, spinach, broccoli and mangoes.

However, excessive supplementation can lead to chapped lips, mental fatigue, dizziness and headache, loss of appetite, skin allergy, urticaria, elevated blood pressure and thrombosis.

For ordinary healthy people, as long as three meals a day are balanced in nutrition and vegetables, coarse grains and meat are separated, there is no need to pay extra for these so-called supplements.

The reason why vitamins can enter people's hearts in this way is mostly the propaganda of those vitamin health care products manufacturers.

It is precisely because of this that I remind all middle-aged and elderly friends to cover their wallets and not be fooled easily.

References:

1 Sharon l, McDonald, Carol Baglai, Christina B French, Leo L Baglai, Cedric F Garland, Edward D Gorham, Joan M Lape, Robert P Heaney. Serum 25- hydroxyvitamin D concentration of 40 ng/ml is associated with cancer risk reduction of more than 65%: a meta-analysis of randomized trials and prospective cohort studies. Gong * * * Science Library1.2016; 1 1:e 0 15244 1

# Vitamins #