Vitamins play a vital role in human nutrition, and for the most part cannot be manufactured by the body. Although many people take vitamins in the hopes of improving their energy levels, of themselves vitamins are not energy sources. Instead, vitamins act as essential for properly regulating the body's metabolic reactions and biochemical processes. When vitamins are deficient in the diet, these various biological functions are impeded, resulting in suboptimal health and a variety of disease conditions specifically related to nutrient imbalances. There are two classifications of vitamins, those that are fat-soluble and those that are water-soluble.

Fat-soluble Vitamins

Water-soluble Vitamins