Caffeine, in addition to making you feel less sleepy and more alert, may boost your mood, cognitive function, and workout performance. Many individuals like their first cup of coffee in the morning. However, some argue that consuming it on an empty stomach may be harmful to your health. The best way to enjoy caffeine is with food or not at all. It depends on how you take it. Coffee has many positive effects on our body. It can reduce your risk of diabetes and heart disease, improve your mental focus and memory, and help you lose weight. Drinking three to five cups of coffee a day can be healthy if you don't overdo it. More than that and you might be looking at some serious health problems down the road! There are two main types of caffeine: caffeic acid and caffeine acid. Caffeine acid is found in tea, cola, and chocolate; while caffeine citrate is present in coffee. Both contain similar amounts of caffeine but different forms of the molecule. Citrus fruits such as oranges and grapefruits contain high levels of caffeine acid which quickly breaks down into caffeine after being ingested. This means that you should avoid eating them close to bedtime because they will only keep you up for longer. Caffeine is one of those substances that can be beneficial when used properly.