Alert! Vitamin Angels is both a devil

Vitamin is an essential human development and healthy nutrients. But we humans can not manufacture or synthesis in the body the necessary vitamins, only from the intake of food or vitamin preparations, and field operations for the detection of those perennial or scientific expedition team, the crew engaged in marine work, living in remote areas of the cold People and restrictions due to physical conditions of patients who can not eat, I am afraid more is to rely on taking some vitamin preparations in order to maintain good health. However, note that taking vitamin preparations, and that is to refrain from excessive.
Although vitamin intake, can cause a variety of deficiency, but if certain types of vitamin overdose, may also cause symptoms of vitamin excess. For example, an adult needed about 800 micrograms of vitamin A retinol equivalent (RE), such as long-term intake of over one hundred thousand international units of vitamin A can lead to excess. However, if the intake of vitamins from food alone, then do not worry about the occurrence of symptoms of vitamin excess, because the amount of vitamins contained in food, after all, is limited, it was not possible to eat so many foods rich in certain vitamins. But if just dependent on vitamin preparation to supplement the vitamins, it is possible to inadvertently exceed the safe dose, resulting in excessive load on the various organs of the body, causing symptoms of vitamin excess. Therefore, oral vitamin, be sure to understand the characteristics of a variety of vitamins, saw the instructions on the safe dose.
Classified as "water-soluble vitamin" and "fat-soluble vitamins" are two
Vitamins according to their solubility in different solvents can be divided into "water-soluble vitamin" and "fat-soluble vitamins" two. "Water-soluble vitamin" includes vitamin B complex and vitamin C, as it can dissolve in water, when the body will be full of vitamins timely excess excreted in the urine. Fat-soluble vitamins, including vitamin A, D, E, K, as these vitamins in the body can only be dissolved in lipids, while lipid efflux is generally not, then the excess consumption of vitamins in addition to the normal outside, it can not be excreted, but only piled up in the body, to a certain extent, they begin to threaten health.
Vitamin A into the human body usually accumulate in the liver, eyes, mucous membrane to promote function, but excess of vitamin A in the liver and fatty acid binding, should not be penetrated into the tissues, causing tissue damage. Acute symptoms of excess vitamin A can cause headache, nausea, hypertension and other symptoms of the brain, chronic disease of excess vitamin A can cause liver function deterioration. Many young mothers often feed their children a lot of cod liver oil, cod liver oil is rich in vitamins A, D, the results can cause infant vomiting, dry skin, wrist and knee swelling, which are typical symptoms of vitamin A excess. Should pay particular attention here is that excess vitamin A deficiency disorders and symptoms are very similar, do not mistake, otherwise it will make more over the more.
Vitamin D overdose is more dangerous.
It will hurt the body's kidneys, and this damage is irreversible. If the excessive intake of vitamin Child D, the most typical symptoms are loss of appetite, abdominal and head pain, and vomiting, diarrhea and other symptoms. Studies have found that too much vitamin D will make the calcium content in the blood increased rapidly, resulting in "hypercalcemia."
Vitamin K is also easy to cause disease of excess fat-soluble vitamins, it may damage the liver function of excess.
Comprehensive vitamin preparations on people's health like a double-edged sword, right amount, it is an angel; excessive, it is the devil.