Caffeine is a stimulant found in many foods and beverages such as coffee, tea, and some sodas.
Caffeine consumption usually causes feelings of alertness, and ninety-eight percent of North Americans consume it in some form. Moderate consumption has been linked with numerous health benefits, including improved memory, a speedier metabolism, and better workouts. However, excess caffeine (more than 500mg per day) can have potentially harmful effects on the body.
- Energy drinks and the neurophysiological impact of caffeine. Persad, L. Department of Physiology, University of Pretoria, Pretoria, South Africa. Frontiers in Neuropharmocology, 2011, Oct;5:116⤴