What is caffeine?

Question

Is it liquid they add or a plant. Sometimes labels say natural caffeine.

Answer 1

It's a stimulant found naturally in coffee and tea and many other products but has also been reproduced in the lab for application to other consumer items such as soda, mints, water.

Answer 2

scientific explanation of caffeine:

http://en.wikipedia.org/wiki/Caffeine

Answer 3

well caffeine is a whit crystal and its very bitter

and the professional term is a psychoactive stimulant drug which basically mean it messes with ur Head

and it also makes you pee more(just some funny side affect).

its adducing too (not so funny)