劍橋詞典one of the vitamin B complex found in foods such as wheat , beef , chicken , and milk , important for producing energy from food and for keeping the digestion and nervous system healthy 煙酸（在小麥、牛肉、雞肉和牛奶等食品中含有的一種復(fù)合維生素B，對(duì)體內(nèi)能量轉(zhuǎn)化和保持消化、神經(jīng)系統(tǒng)健康有著重要作用） 返回 niacin