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 B7
Vitamin B9
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, vitamins as a group of complex organic compounds present in minute amounts in natural foodstuffs that are essential to normal metabolism and lack of which in the diet causes deficiency disease.
Vitamins are not a single group of chemicals, but a mixed group of chemical compounds having similar functions.
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 a few vitamin-like 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 human ingest (vitamin D, choline, lipoic acid, p-aminobenzoic acid, and inositol.
Many of vitamins functions as co-enzymes or metabolic catalysts; others have no such role, but perform certain essential functions.
Enzymes control the chemical reactions of life. They perform their function over and over again.
The Vitamin Definition
