Vitamins are vital organic nutrients required in tiny amounts in the diet, because
they cannot be synthesized in sufficient quantities by the body.
Vitamins have diverse biochemical functions.
Some have hormone-like functions as regulators of calcium metabolism (vitamin D),
others support cell and tissue growth and differentiation (vitamin A) or work as
antioxidants (vitamin E and vitamin C).
The largest group of vitamins (the B vitamins) are precursors of cofactors, that
assist enzyme functions in the metabolism.
You can find more about all the vitamins by following the links below.