are low molecular weight organic compounds indispensable for the normal
activity of the organisms. Their absence causes deficiency symptoms. Most of
the vitamins or their derivatives are coenzymes which are essential for many
important enzymatic reactions in the cells.
are required in small quantities for a variety of biochemical functions in our
body. Most of them cannot be synthesised by the body and must be supplied
through the diet. Unlike carbobydrates and lipids, they are not metabolised for
providing energy. Normally, a well balanced diet will supply all the necessary
vitamins in sufficient quantities.
are broadly classified into two groups based on their solubility.
A, D, E and K
Water soluble vitamins
B (B1, B2, B3, B6 & B12),
Biotin, Folic acid, Pantothenic acid and C