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  2. Vitamin - Wikipedia

    en.wikipedia.org/wiki/Vitamin

    In Wikidata. Vitamins are organic molecules (or a set of closely related molecules called vitamers) that are essential to an organism in small quantities for proper metabolic function. Essential nutrients cannot be synthesized in the organism in sufficient quantities for survival, and therefore must be obtained through the diet.

  3. Biotin - Wikipedia

    en.wikipedia.org/wiki/Biotin

    Biotin is a water-soluble B vitamin. Consumption of large amounts as a dietary supplement results in absorption, followed by excretion into urine as biotin. Consumption of biotin as part of a normal diet results in urinary excretion of biotin and biotin metabolites.

  4. Vitamin A - Wikipedia

    en.wikipedia.org/wiki/Vitamin_A

    Vitamin A status involves eye health via two separate functions. Retinal is an essential factor in rod cells and cone cells in the retina responding to light exposure by sending nerve signals to the brain. An early sign of VAD is night blindness. [6] Vitamin A in the form of retinoic acid is essential to normal epithelial cell functions.

  5. Thiamine - Wikipedia

    en.wikipedia.org/wiki/Thiamine

    Thiamine, also known as thiamin and vitamin B 1, is a vitamin, an essential micronutrient for humans and animals. [ 3 ] [ 4 ] It is found in food and commercially synthesized to be a dietary supplement or medication .

  6. Riboflavin - Wikipedia

    en.wikipedia.org/wiki/Riboflavin

    Riboflavin, also known as vitamin B2, is a vitamin found in food and sold as a dietary supplement. [3] It is essential to the formation of two major coenzymes, flavin mononucleotide and flavin adenine dinucleotide. These coenzymes are involved in energy metabolism, cellular respiration, and antibody production, as well as normal growth and ...

  7. Human nutrition - Wikipedia

    en.wikipedia.org/wiki/Human_nutrition

    Human nutrition deals with the provision of essential nutrients in food that are necessary to support human life and good health. [1] Poor nutrition is a chronic problem often linked to poverty, food security, or a poor understanding of nutritional requirements. [2]