Caffeine is a purine alkaloid naturally found in the
The leaves of the tea plant, Paraguayan holly Mate,
coffee and cocoa seeds, and in other plants. Caffeine is
adenylyl receptor antagonist, has a stimulating effect on the central
nervous system, causes acceleration of heart rate, dilation of
blood vessels and increases dopamine activity
The most common sources of caffeine are coffee and tea
When consumed in moderate amounts, caffeine improves mood and
concentration, and removes fatigue. An overdose of caffeine can
carry serious consequences such as severe stimulation
psychomotor agitation, accelerated heart rate, increased diuresis, nausea,
vomiting or weakness.