Coffee is a beverage prepared from the roasted fruit of the Coffea arabica bush, known as coffee beans. Coffee is widely consumed to alleviate mental and physical exhaustion and improve mental alertness. Coffee is also used to prevent Parkinson’s disease, dementia, and various other ailments, but many of these claims are based on a lack of scientific proof.
Caffeine is present in coffee. Caffeine stimulates the central nervous system (CNS) and the heart and muscles. Other compounds found in coffee may offer additional health benefits. Mental vigilance.