Vitamin

A vitamin is an essential molecule for correct development and normal functioning of the body which cannot synthesise them in sufficient amounts. These molecules have no energy value and must be taken daily at low doses. There are different classes of vitamins: vitamin A, B, C, D, E, K, PP. A balanced diet avoids vitamin deficiency: a few examples of vitamin deficiency: vitamin C: scurvy; vitamin B1: beri- beri; vitamin D: rickets.