Vitamin A is fat soluble, which means that the body stores it, mostly in the liver. That also means that it is possible to build up toxic levels of it in the body. This rarely happens from food sources because as the body builds up supplies of vitamin A, it will slow down the processing of beta carotene conversion to vitamin A. When people do get vitamin A toxicity, it is usually from taking too much in supplemental, or pill, form. Toxic levels of vitamin A can cause liver problems, central nervous system problems, deterioration of bone density, and birth defects. Vitamin A is also helpful to bone growth and your immune system. As with other vitamins, there are different forms of vitamin A. One of the forms that is most usable to the body is called retinol, and it can be found in liver, eggs, and milk. One of the most common provitamin A carotenoids that the...
