Coffee is a major source of the phenolic compound chlorogenic acid and the vitamin B3 precursor trigonelline that have been shown to reduce blood glucose concentrations in animal studies.

• 咖啡是酚类成份绿原酸以及维他命B3前驱物胡卢巴碱的重要来源，胡卢巴碱在动物研究中显示可降低血糖浓度。