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Vitamins are classified as either water-soluble or fat-soluble. In humans there are 13 vitamins: 4 fat-soluble (A, D, E, and K) and 9 water-soluble (8 B vitamins and vitamin C). Water-soluble vitamins dissolve easily in water and, in general, are readily excreted from the body, to the degree that urinary output is a strong predictor of vitamin ...
B vitamins are a class of water-soluble vitamins that play important roles in cell metabolism and synthesis of red blood cells. [1] [2] They are a chemically diverse class of compounds. [1] Dietary supplements containing all eight are referred to as a vitamin B complex.
Physically it resembles the other forms of vitamin B 12, occurring as dark red crystals that freely form cherry-colored transparent solutions in water. Vitamin B 12 is the most chemically complex of all the vitamins. [6] The structure of B 12 is based on a corrin ring, which is similar to the porphyrin ring found in heme. The central metal ion ...
Jack Drummond's single-paragraph article in 1920 which provided structure and nomenclature used today for vitamins. In 1910, the first vitamin complex was isolated by Japanese scientist Umetaro Suzuki, who succeeded in extracting a water-soluble complex of micronutrients from rice bran and named it aberic acid (later Orizanin).
Thiamine is one of the B vitamins and is also known as vitamin B 1. [1] [11] [12] It is a cation that is usually supplied as a chloride salt. [3]It is soluble in water, methanol and glycerol, but practically insoluble in less polar organic solvents.
Vitamin C (also known as ascorbic acid and ascorbate) is a water-soluble vitamin found in citrus and other fruits, berries and vegetables. It is also a generic prescription medication and in some countries is sold as a non-prescription dietary supplement.
Vitamin A is the name for a group of retinoids, according to the National Institutes of Health (NIH). Like vitamins D, E and K, it’s a fat-soluble vitamin , which means it dissolves in fat and ...
This page was last edited on 31 December 2010, at 08:36 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may apply.
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