Of the micronutrients you need there are thirteen different vitamins. Of these vitamins only vitamin D can be produced by the body and this occurs only when you get enough exposure to sunlight. There are two types of vitamins; water soluble and fat soluble. The water soluble vitamins are the B complexes and C. Since they cannot be stored in the body you need to ingest a certain amount every day. Excess mounts are excreted out of the body usually with no negative consequences. The fat soluble vitamins A, D, E and K are stored in the body. When ingesting them you need to exercise a bit of caution, as consuming very large quantities of these can be toxic to the body.