na search ko na pala mga sis no need na.
some informations that i read:
Quick Facts...
* Small amounts of vitamins A, D, E and K are needed to maintain good health.
* Foods that contain these vitamins will not lose them when cooked.
* The body does not need these every day and stores them in the liver when not used.
* Most people do not need vitamin supplements.
* Megadoses of vitamins A, D, E or K can be toxic and lead to health problems.
Vitamins are essential nutrients your body needs in small amounts for various roles in the human body. Vitamins are divided into two groups: water-soluble (B-complex and C) and fat-soluble (A, D, E and K). Unlike water-soluble vitamins that need regular replacement in the body, fat-soluble vitamins are stored in the liver and fatty tissues, and are eliminated much more slowly than water-soluble vitamins.
Because fat-soluble vitamins are stored for long periods, they generally pose a greater risk for toxicity than water-soluble vitamins when consumed in excess. Eating a normal, well-balanced diet will not lead to toxicity in otherwise healthy individuals. However, taking vitamin supplements that contain mega doses of vitamins A, D, E and K may lead to toxicity. Remember, the body only needs small amounts of any vitamin.
While diseases caused by a lack of fat-soluble vitamins are rare in the United States, symptoms of mild deficiency can develop without adequate amounts of vitamins in the diet. Additionally, some health problems may decrease the absorption of fat, and in turn, decrease the absorption of vitamins A, D, E and K. Consult your doctor about this.
Table 1 lists sources of fat-soluble vitamins, their basic functions in the body, major deficiency symptoms caused by a lack of these vitamins, and symptoms of over-consumption.