The question and answer are locked and cannot be edited.

What is caffeine?

already exists.

Would you like to merge this question into it?

already exists as an alternate of this question.

Would you like to make it the primary and merge this question into it?

exists and is an alternate of .

Caffeine is a bitter white crystalline xanthine that acts as a psychoactive stimulant drug and a mild diuretic (speeds up urine production) in humans and other animals. Caffeine was discovered by a German chemist, Friedrich Ferdinand Runge, in 1819. He coined the term "kaffein", a chemical compound in coffee, which in English became caffeine. Caffeine is also called guaranine when found in guarana, mateine when found in mate, and theine when found in tea; all of these names are synonyms for the same chemical compound.
Caffeine is found in varying quantities in the beans, leaves, and fruit of some plants, where it acts as a natural pesticide that paralyzes and kills certain insects feeding on the plants. It is most commonly consumed by humans in infusions extracted from the beans of the coffee plant and the leaves of the tea bush, as well as from various foods and drinks containing products derived from the kola nut. Other sources include yerba mate, guarana berries, and the Yaupon Holly.
In humans, caffeine is a central nervous system (CNS) stimulant, having the effect of temporarily warding off drowsiness and restoring alertness. Beverages containing caffeine, such as coffee, tea, soft drinks and energy drinks enjoy great popularity. Caffeine is the world's most widely consumed psychoactive substance, but unlike most others, it is legal and unregulated in nearly all jurisdictions. In North America, 90% of adults consume caffeine daily. The U.S. Food and Drug Administration lists caffeine as a "Multiple Purpose Generally Recognized as Safe Food Substance.One 2008 study suggested that women consuming 200 milligrams or more of caffeine per day had about twice the miscarriage risk as women who had none, while another 2008 study found no link between miscarriage and caffeine consumption.

Please see the Related Questions and the Sources and Related Links below.
Caffeine is a naturally occurring white bitter alkaloid found in the seeds and other parts of plants, particularly coffee. It acts as a natural insecticide for the plants, helping to control and even kill some of the insects that would feed on the plants, and and the same time it acts as a reward mechanism for insects that pollinate the plants. In humans it acts as central nervous system (CNS) stimulant.
Thanks for the feedback!

What does caffeine do to you?

Caffeine is a stimulant that temporarily reduce the sensation of being tired. Extreme amounts of caffeine can cause health problems.

What is caffeine made from?

Caffeine can be derived from the coffee bean, from the tea leaf, from the guarana seed, and from the kola nut, as well as many other plant sources.

What is caffeine made of?

Carbon (C), Nitrogen (N), Oxygen (O) and Hydrogen (H). Caffeine is a naturally produced drug that can be found in numerous places but mostly in leaves and seeds of many trees

What can caffeine do to you?

Caffeine, when in the blood system, allows a gland in the brain to unlock, releasing an endorphin in the blood stream causing your heart to beat faster, and thusly everything

What is caffeine anhydrous?

  Caffeine Anhydrous is a powerful energy accelerant. Caffeine, in the form of a Caffeine pill, is the perfect way to energize your body for powerful workouts. Caffeine An

What is caffeine used for?

The biggest use of caffeine is as a stimulant. People drink coffee and other drinks with caffeine to stay awake. Doctors sometimes use caffeine as a medicine like for example:
In Health

What is caffeine and what products contain caffeine?

Caffeine is some substance that can give u a lot of energy but can have bad effects. Things that u eat that can contain caffeine are chocolate {not white chocolat though}, cof