B vitamins are used in the body individually or in combination with enzymes to help release energy from carbohydrates, fat, and protein. Vitamin B coenzymes are crucial to the metabolic pathways that generate the energy needed by every cell in the body. Because they are co-dependent in their metabolic activities, a deficiency of one B vitamin can affect optimal functioning of organ systems throughout the body.

Most B-complex products contain the same amount of each B vitamin. On the other hand, studies have shown that pantothenic acid (vitamin B5) has an ideal daily dose of over 700 mg. Complete B-Complex contains high amounts of pantothenic acid, and different amounts of other B-vitamins in safe amounts.