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Caffeine

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[1]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. 

Learn More:

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Why Coffee and Tea Are Amazing For You [INFOGRAPHIC]
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  1. 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
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