The Vitamin Definition

Vitamin
The vitamin known to be essential for human being for human growth, maintenance, and health are listed below.

Vitamin B1
Vitamin B2
Vitamin B3
Vitamin B5
Vitamin B6
Vitamin B12
Biotin
Choline
Inositol
Lipoic acid
PABA (p-amino benzoic asid)
Vitamin C
Vitamin A
Vitamin D
Vitamin E
Vitamin K

It may noted that, by definition, a vitamin is a complex, a vitamin is a complex organic substance, required a very small quantities in the diet relative to all other nutrients save the trace of elements.

Vitamins are essential in that they cannot produced by our own tissues at all or in sufficient quantities to supply our needs under normal circumstances. There are afew vitaminlike substances that are not considered essential, as they are usually produced by our own tissues in sufficient amounts or are part of other vitamins or nutrients we ingest (vitamin D, choline, lipoic acid, p-aminobenzoic acid, and inositol.
Vitamin