caffeine

noun

1. a bitter alkaloid found in coffee and tea that is responsible for their stimulating effects

Synonym: caffein

1. 咖啡因;咖啡碱
Caffeine is a chemical substance found in coffee, tea, and cocoa, which affects your brain and body and makes you more active.

1. 咖啡碱：主要成份: 咖啡碱 (Caffeine) 加速血液循环,把eye cream 成份更容易带进眼部肌肤 透明质酸 (Hyaluronic acid) 透明质酸是皮肤的天然保湿因子,不仅保持皮肤弹性功能,锁住大量水份子,同时对皮肤、关节组织具有保湿润滑作用.

2. 咖啡：[化学成份] 茶叶含膘呤类生物碱,以咖啡(caffeine)为主,含量1%-5%,另有可可豆碱(theobromine),茶碱(theophylline),黄瞟呤(xanthine). 还含鞣质,绿茶中含缩合鞣质约10%-24 %,红茶中约6%左右,其中没食子酸以左旋表没食子儿茶精酯[(-)epigallocatechin gallate]为主,

3. 咖啡因--咖啡因：咖啡碱就是咖啡因咖啡因(caffeine)又可称为咖啡碱(theine)或甲基可可碱(methyltheobromine),其化学式为C8H10N4O2,主要的成分为黄碱(黄嘌呤)(xanthine,(CH3)3C5HN4O2),是一种存在于自然界中的天然物质.