Caffeine

Caffeine is a central nervous system stimulant. It boosts alertness, energy, and metabolism. Consuming too much of it can lead to insomnia, jitters, anxiety, rapid heart rate, and gastrointestinal issues. Many people avoid caffeine entirely, despite the fact that moderate amounts generally don’t have ill effects for most people. There have also been long-term benefits of caffeine observed including lower risks of type 2 diabetes and Parkinson’s disease.