8 B Vitamins

Vitamin B₁thiamine
A coenzyme in the catabolism of sugars and amino acids.

Vitamin B₂ riboflavin

A precursor of cofactors called FAD and FMN, which are needed for flavoprotein enzyme reactions, including activation of other vitamins.

Vitamin B₃ niacin (nicotinic acid), nicotinamide ribosideA precursor of coenzymes called NAD and NADP, which are needed in many metabolic processes.

Vitamin B₅ pantothenic acidA precursor of coenzyme A and therefore needed to metabolize many molecules.

Vitamin B₆ pyridoxine, pyridoxal, pyridoxamineA coenzyme in many enzymatic reactions in metabolism.

Vitamin B₇ biotinA coenzyme for carboxylase enzymes, needed for synthesis of fatty acids and in gluconeogenesis.
Vitamin B₉
folic acidA precursor needed to make, repair, and methylate DNA; a cofactor in various reactions; especially important in aiding rapid cell division and growth, such as in infancy and pregnancy.

Vitamin B₁₂ various cobalamins; commonly cyanocobalamin or methylcobalamin in vitamin supplements