which vitamin functions mainly as coenzymes in
Vitamins That Function As Coenzymes. B vitamins act as coenzymes to help enzymes do their work in metabolism. Photo Credit Fred Froese/Photodisc/Getty Images. Members of the vitamin B complex serve as coenzymes that assist every cell in the human body.They help the body metabolize carbohydrates, proteins and fats and build DNA for new cells. Without its coenzyme, an enzyme will not function. Vitamins work together in impressive ways as coenzymes or precursors to coenzymes.Precursors are substances that can be converted into active vitamins and coenzymes.ithout its coenzyme, an enzyme will not function. Vitamins work together in impressive ways as coenzymes or precursors to coenzymes. Precursors are substances that can be converted into active vitamins and coenzymes.