Body requires essential nutrients in the form of vitamins to sustain life. Because of the presence of “carbon”, these nutrients are termed as organic compounds. Human body is capable of synthesizing vitamins as well as we can also acquire them form diet. Scientific approaches have declared that food is the most important source of vitamins but some physicians also advise supplements to use. In history, 13 common vitamins have been evolved. Each of them is involved in different process and is needed in different quantity. Therefore, their requirements vary according to life stages. On the basis of functionality, vitamins are divided into two main groups i-e, water soluble and fat soluble.