When it comes to vitamin A, the first thing they mention is probably the current lack of disease.  But recently, experts are beginning to worry that too much vitamin A will be a poison.  The scientific results tell us that the ordinary scheme will not lead to it.

Vitamin A deficiency is one of the four deficiency diseases in the world.  This vitamin is an organic compound necessary for normal life activities.  Their numbers in the human body is very low.  But, plays an important role in metabolism and growth.

There are four functions of this type of vitamin.  The first is to maintain the integrity of the mucosa.  O led to keratosis.  The second function is to compose the photosensitive elements in the visual cells.  Otherwise, would the adaptation of the eyes become even worse.  And sometimes patients nyctotphlosis.  Another function is to promote growth and reproduction.  And the last is to improve immunity.

Lack of vitamin A in the world can lead to the death of one million to 2.5 million.  Half a million children go blind each year because of this.  A four-month investigation of this in China showed that 11.7% of children in China do not have the vitamins.  This problem in China, especially in western China, is very serious.  In developed countries, clinical cases are much smaller, but the situation is also worrisome.

However, we note that the vitamin is water soluble or fat soluble.  When too much on the body, not water-soluble vitamin does not affect the body but fat soluble vitamins are stored in fat and become a poison.  Vitamin A is fat soluble type, stored in the liver.  Too much vitamin A can cause poisoning.

normal diet and foods rich in nutrients, usually does not lead to poisoning.  Almost all overeating is poisoned by accident.  In the 1590s, had pioneered in the north pole of the polar bear liver, which contained a large amount of vitamin A, or had symptoms of headache, vomiting and drowsiness.  When a man of 19, she ate a pound of dog liver was poisoned by vitamin A. Later, they should not live in a half.  Will destroy too many cells, and bone.  So if too much vitamin A is ingested by pregnant women, women computer technology items, and even lead to a congenital malformation.