Vitamins are vital micronutrients that cannot be synthesized endogenously or in insufficient amounts, and the principal means by which we get vitamins is through our diet. Vitamins can be classified as water-soluble or fat-soluble. The fat-soluble vitamins include vitamins A, D, E, and K. Fat-soluble vitamins play integral roles in a multitude of physiological processes such as vision, bone health, immune function, and coagulation. This review discusses the biochemistry, transport, and roles of these vitamins, highlighting deficiency syndromes and potential toxicities.
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