A na-agbanwe vitamin A ka ọ bụrụ retinol n'anya, ọ bụkwa ya na-eme ka akpụkpọ ahụ sel kwụsie ike.

Vitamin D₃Ọ na-arụ ọrụ dị mkpa na nhazi nke calcium na phosphate na plasma.

Vitamin E na-arụ ọrụ dị ka ihe na-egbochi ihe na-egbu egbu na ihe na-akpata nsogbu n'efu, ọkachasị maka abụba ndị na-enweghị afọ ojuju dị na phospholipids nke akpụkpọ ahụ sel.

Vitamin B₁na-arụ ọrụ dị ka co-enzyme na-ebelata glucose na glycogen.

Vitamin B₂A na-etinye Sodium Phosphate n'ime phosphorylated iji mepụta co-enzymes Riboflavin-5-phosphate na Flavin Adenine Dinucleotide (FAD) nke na-arụ ọrụ dị ka ndị nnata hydrogen na ndị na-enye onyinye.

Vitamin B₆A na-agbanwe ya ka ọ bụrụ pyridoxal phosphate nke na-arụ ọrụ dị ka co-enzyme na transaminases na decarboxylases na metabolism nke protein na amino acid.

A na-agbanwe Nicotinamide ka ọ bụrụ ihe ndị dị mkpa dịka co-enzymes. Nicotinamide Adenine Dinucleotide (NAD) na Nicotinamide Adenine Dinucleotide Phosphate (NADP).

A na-agbanwe pantothenol ma ọ bụ pantothenic acid ka ọ bụrụ Co-ensyme A nke nwere ọrụ dị mkpa na metabolism nke carbohydrates na amino acid yana na njikọ nke abụba acids, steroids na acetyl co-enzyme A.

Vitamin B₁₂dị mkpa maka njikọta nke ihe ndị mejupụtara nucleic acid, njikọta nke mkpụrụ ndụ ọbara uhie na metabolism nke propionate.

Vitamin dị mkpa maka ịrụ ọrụ kwesịrị ekwesị nke ọtụtụ ọrụ physiological.