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複合維生素B，對體内能量轉化和保持消化、神經系統健康有着重要作用）