Vitamins can be defined as the essential dietary factors required by an organism in minute quantities and whose absence causes specific deficiency diseases. Vitamins are broadly classified into two types:-
(i) Fat-soluble vitamins:
These are oily substances not readily soluble in water. These include vitamins A, D , E and K.
(ii) Water-soluble vitamins:-
Vitamins that are soluble in water belong to this group. For example :B group vitamins (B1 ,B2 ,B6, B12 ,etc.) and vitamin C.
Vitamin K is responsible for the coagulation of blood.
Vitamin H (Biotin) as an exception, it is neither soluble in water nor in fat
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