What is Caffeine?

Caffeine meaning A substance found in the leaves and beans of the coffee tree, in tea, yerba mate, guarana berries, and in small amounts in cocoa. It can also be made in the laboratory, and is added to some soft drinks, foods and medicines. Caffeine increases brain activity, alertness, attention and energy. It may also increase blood pressure, heart rate, breathing rate and the loss of water from the body in urine.


reference: national Cancer Institute – Glossary for Registrars

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