Caffeine, perhaps coffee's most famous component, seems to have little to do with it; studies that looked at decaffeinated coffee alone found the same degree of risk reduction.

咖啡因可能是咖啡含有的最知名的成分，但看起来却没什么作用。一项使用脱去咖啡因的咖啡所作的实验显示其也能达到同样的降低血糖浓度的效果。