Final answer:
Vitamins are organic molecules that act as coenzymes or cofactors, can act as antioxidants, but can be harmful in excessive or deficient amounts.
Step-by-step explanation:
Vitamins are organic molecules that are essential for various metabolic processes in the body. They do not attach to enzymes to help them function, instead, they act as coenzymes or cofactors. Vitamins can act as antioxidants, which help protect cells from damage caused by free radicals. However, too little or too much of a vitamin can be harmful to the body.
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