Though there is some conflicting research concerning possible health benefits of caffeine, some studies have shown that caffeine can help lower the risk of certain cancers, including liver, mouth and throat cancer. Additionally, caffeine may help with mental health issues such as suicidal ideation and memory loss. Caffeine could also provide some protection against type-2 diabetes, Parkinson's disease, stroke and cardiovascular disease.
Very few scientists would argue that caffeine isn't helpful in providing more energy; after all, caffeine is technically a psychoactive drug that has strong stimulant effects. However, some experts report that caffeine has some negative effects, including insomnia and digestive issues.