Vitamins, are either water-soluble or fat-soluble. The B-complex group and vitamin C are water-soluble and are not stored in the body for long. Under normal circumstances, any excess that you take will be urinated away. However, extremely high doses may be toxic.
Vitamins A, D, E, and K are fat-soluble and are stored in the fat tissues and in the liver. If taken in mega-doses, these vitamins can accumulate to dangerous levels.
