What is an active site and what is its relationship to an enzyme? an active site in an enzyme is the area that breaks the bond in its substrate. E.g. a maltose molecule's glycocide bond is broken by the active site in a maltase enzyme.
The caffeine in a cup of coffee might help your small blood vessels work better. Credit: Â© jogyx / Fotolia. The caffeine in a cup of coffee might help your small blood vessels work better, according to research presented at the American Heart Association's Scientific Sessions 2013.
Kidneys: Caffeine is also correlated with kidney stones, possibly as a result of its diuretic effect and of the effects of chemicals used in processing coffee. Fibrocystic Breast Disease: Fibrocystic breast disease may also be consequence of caffeine use.