The caffeine found in coffee beans is a natural stimulant that improves performance during endurance exercise. It also helps reduce the perception of pain and fatigue and improves muscle work when taken before or during exercise. On average, 8 coffee beans provide the same amount of caffeine as one cup of coffee. Coffee beans are packed with powerful antioxidants. Studies show that chlorogenic acid can reduce the risk of diabetes and fight inflammation. Some trials suggest that coffee beans may also have anti-cancer properties.