Vitamins are essential organic nutrients required by the animal in small quantities for proper function of its metabolism. Vitamins are grouped into two categories, water or fat soluble. There are nine water soluble vitamins, consisting of vitamin C and 8 vitamins from the B-complex. Excessive levels will be excreted by the animal. Fat-soluble vitamins include the vitamins, A, D, E and K. In the body, these vitamins are absorbed by fat globules and stored in liver and other fatty tissue and are released as needed. Vitamins supplied by Orffa, are developed according to European quality standards and can be offered in composite packages.