a nutrient in the vitamin b complex that the body needs in small amounts to function and stay healthy. niacin helps some enzymes work properly and helps skin, nerves, and the digestive tract stay healthy. niacin is found in many plant and animal products. it is water-soluble (can dissolve in water) and must be taken in every day. not enough niacin can cause a disease called pellagra (a condition marked by skin, nerve, and digestive disorders). a form of niacin is being studied in the prevention of skin and other types of cancer. niacin may help to lower blood cholesterol. also called nicotinic acid and vitamin b3.
身体の機能や健康維持のために少量だけ必要とされるビタミンb群の栄養素。ナイアシンは一部の酵素が正常に機能するのを助けるほか、皮膚、神経、消化管を健康な状態に保つ働きをする。ナイアシンは多くの植物性および動物性食品に含まれる。水溶性(水に溶けること)であり、毎日摂取する必要がある。ナイアシンが不足すると、ペラグラと呼ばれる疾患(皮膚、神経、消化器の障害を特徴とする病態)が生じる可能性がある。ナイアシンの一種が、皮膚がんおよびその他のがんの予防の分野で研究されている。ナイアシンには血中コレステロール値を低下させる働きのある可能性がある。「nicotinic acid(ニコチン酸)」、「vitamin b3(ビタミンb3)」とも呼ばれる。
出典:Wiktionary
出典:『Wiktionary』 (2025/09/21 00:57 UTC 版)
in 1942 derived from nicotinic + acid + vitamin, chosen to dissociate it from nicotine, to avoid the perception that vitamins or niacin-rich food contains nicotine, or that cigarettes contain vitamins.
niacin (uncountable)
出典:Wikipedia
出典:『Wikipedia』 (2011/06/29 17:30 UTC 版)
Niacin (also known as vitamin B3, nicotinic acid and vitamin PP) is an organic compound with the formula C6H5NO2 and, depending on the definition used, one of the forty to eighty essential human nutrients. This colorless, water-soluble solid is a derivative of pyridine, with a carboxyl group (COOH) at the 3-position. Other forms of vitamin B3 include the corresponding amide, nicotinamide ("niacinamide"), where the carboxyl group has been replaced by a carboxamide group (CONH2), as well as more complex amides and a variety of esters. The terms niacin, nicotinamide, and vitamin B3 are often used interchangeably to refer to any member of this family of compounds, since they have similar biochemical activity.
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