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The term vitamin does not include the three other groups of essential nutrients: minerals, essential fatty acids, and essential amino acids. [2] Major health organizations list thirteen vitamins: [3] [4] [5] Vitamin A (all-trans-retinols, all-trans-retinyl-esters, as well as all-trans-β-carotene and other provitamin A carotenoids) Vitamin B 1
Vitamin B complex. Vitamin B 1 (thiamin) Vitamin B 2 (riboflavin) Vitamin B 3 (niacin) Vitamin B 5 (pantothenic acid) Vitamin B 6 group: Pyridoxine; Pyridoxal-5-Phosphate; Pyridoxamine; Vitamin B 7 (biotin) Vitamin B 9 (folate) Vitamin B 12 (cobalamin) Choline; Vitamin A (e.g. retinol (see also - provitamin A carotenoids)) Vitamin C (Ascorbic ...
A vitamin is an organic compound required by an organism as a vital nutrient in limited amounts. [12] An organic chemical compound (or related set of compounds) is called a vitamin when it cannot be synthesized in sufficient quantities by an organism and must be obtained from the diet. The term is conditional both on the circumstances and on ...
List of B vitamins Vitamin Name Description Vitamin B 1: Thiamine: A coenzyme in the catabolism of sugars and amino acids.: Vitamin B 2: Riboflavin: A precursor of coenzymes called FAD and FMN, which are needed for flavoprotein enzyme reactions, including activation of other vitamins
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orange pigments . α-Carotene – to vitamin A carrots, pumpkins, maize, tangerine, orange.; β-Carotene – to vitamin A dark, leafy greens, red, orange and yellow fruits and vegetables.
The different naturally occurring vitamers of vitamin E are not interconverted in the body and have different metabolic effects. Newly absorbed vitamers of vitamin E are transported to the liver. The liver recognizes and preferentially re-secretes α-tocopherol into circulation, making it the most abundant vitamer of vitamin E in the blood. [2]