Siteadmin, Check users, nsTeam1RO, nsTeam1RW, nsTeam1_talkRO, nsTeam1_talkRW, oversight, Administrators
30,650
edits
Changes
Jump to navigation
Jump to search
Line 1:
Line 1: − + + + + + − Some substances are vitamins in certain organisms, but not in others (for example, ascorbic acid can be produced by all [[mammal]]s except [[guinea pig]]s and [[human]]s, and so is a vitamin only in those two instances. − Other substances needed to sustain life are not vitamins because they are macronutrients (for example, the essential amino acids).<ref>Harrison's Principles of Internal Medicine 16th Edition by Dennis L. Kasper, Eugene Braunwald, Anthony Fauci, and Stephen Hauser, 2004</ref>
remove wording which suggests that human beings are "organisms" - a typical liberal way of lowering us to the level of animals
A '''vitamin''' is a [[chemical]] substance required, in very small amounts, to maintain an organism's health. They act as a catalyst in the body's chemical reaction, commonly as part of [[metabolism]]. It cannot be produced by the organism, and so must be obtained from dietary or other sources. In order for a substance to be classified as a vitamin, its deficiency must produce a specific [[disease]]. For example, ascorbic acid is a vitamin ([[Vitamin C]]) in humans because its absence produces [[scurvy]], a lack of Vitamin D will result in [[rickets]], and thiamin is a vitamin (Vitamin B1) because its absence produces [[beriberi]]. There are exactly thirteen essential vitamins for humans.
A '''vitamin''' is a [[chemical]] substance acting as a catalyst in the body's chemical reaction, commonly as part of [[metabolism]]. It must be obtained from dietary or other sources. In order for a substance to be classified as a vitamin, its deficiency must produce a specific [[disease]].{{fact}} For example, [[ascorbic acid]] is a vitamin ([[Vitamin C]]) in humans because its absence produces [[scurvy]], a lack of Vitamin D will result in [[rickets]], and [[thiamin]] is a vitamin (Vitamin B1) because its absence produces [[beriberi]]. There are exactly thirteen essential vitamins for humans.
Other substances needed to sustain life are not vitamins because they are macronutrients (for example, the essential amino acids).<ref>Harrison's Principles of Internal Medicine 16th Edition by Dennis L. Kasper, Eugene Braunwald, Anthony Fauci, and Stephen Hauser, 2004</ref>
==List of Vitamins==
==List of Vitamins==