The one to the alkaloids counting substance (also caffeine, thein) belongs to the psychotropic (influencing the human psyche) substances from the group of stimulants. In its pure form it appears as a white, odorless, crystalline powder bittertaste on. Caffeine is the stimulating component of cola (Coca Cola, Pepsi Cola etc.), coffee, Tea and energy drinks and is also used for that flavoring of wine-based drinks (not wine) or by using cola in wine mixed drinks used. This must be above 150 mg / l label be declared by stating "increased caffeine content". See also under ADI (Acceptable Daily Intake).