Caffeine is a chemical in the Xanthine in medical, the feature of these substances is stimulate brain function, trachea And can also be a diuretic. Caffeine, a white powder. A bitter taste. Water soluble in organic solvents, as well.Caffeine is absorbed well from all parts of the gastrointestinal tract. Caffeine is absorbed into the bloodstream within the body, we do not exceed the 1 hours. But if the caffeine in an empty stomach or are hungry. Will be absorbed into the bloodstream within 30 minutes. Because of this therefore feel energetic. Caffeine will spread to the brain, heart, liver, and kidney quickly also spread to all parts of the body. Caffeine was consumed in the liver and is excreted in the urine, caffeine, is strong in the body about 3-6 hours. Except those with liver function decreased. The ability in terms of known caffeine is reduced. Upon receiving the medication or substance removal of caffeine, such as birth control pills with alcohol Estradiol could caffeine accumulates in the body, and an unwanted. Such as shaking hands, dizziness, headache, etc.