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Vitamins: Body
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Vitamins are organic molecules that are necessary for normal metabolism in animals, but either are not synthesized in the body or are synthesized in inadequate quantities. Consequently, vitamins must be obtained from the diet. Most vitamins function as coenzymes or cofactors. Deficiency states are recognized for all vitamins, and in many cases, excessive intake ... leads to disease.
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Vitamins are carbon-comprised organic chemical compounds the body needs to consume for growth, repair, metabolism and overall health. Exceptions are vitamins D, K, choline and biotin, which technically the body can self-produce.
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Vitamins do not share a common chemistry, but they do share certain characteristics. They are all organic nutrients that are necessary in small amounts for normal metabolism and good health. Your diet or supplements provide most vitamins. The body can manufacture only three vitamins (D, K, and the B vitamin biotin) from nondietary sources. Unlike carbohydrates, fats, and proteins, vitamins are not sources of energy. Instead, vitamins are chemical partners for the enzymes involved in the body's metabolism, cell production, tissue repair, and other vital processes.
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Vitamins assist in the processes of energy production, growth, maintenance, and repair. By keeping the body working properly, vitamins help to maintain health as well as proper growth and development in younger persons. Vitamins ... assist in producing red blood cells, clotting blood, and maintaining vision.
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Vitamins are classified as either water-soluble, meaning that they dissolve easily in water, or fat-soluble vitamins, which are absorbed through the intestinal tract with the help of lipids (fats). In general, water-soluble vitamins are readily excreted from the body. Each vitamin is typically used in multiple reactions and, therefore, most have multiple functions.[12]
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Vitamins work in various ways, and are often closely related to each other in their reactions within the body. Most vitamins do not occur alone. They are often found in pairs or groups.
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