Vitamin


 * vitamin
 * liposoluble vitamin(more toxic, can't be taken usually):A, D, E, K
 * water soluble vitamin(less toxic, maybe can be taken more often): vitamins besides A, D, E, K
 * take only one kind of vitamin often lessen life.
 * some reports say that it is not good to take vitamins: James Watson Says Antioxidants May Actually Be Causing Cancer(search this title)(this title is from paper:"Oxidants, antioxidants and the current incurability of metastatic cancers")