An alkaloidal compound that has a physiological effect on humans, and a bittering taste. It is found throughout the coffee plant but is more concentrated in the seed / coffee bean. ArabicaArabica refers to Coffea Arabica, the taxonomic species name of the genus responsible for around 75% of the worlds commercial coffee crop.: Arabica refers to Coffea Arabica, the... ranges from 1.0 to 1.6% caffeine, and RobustaAteng is a common name for Catimor coffees widely planted in Sumatra and other Indonesia isles.: Ateng, with several subtypes, is a common name for Catimor coffees widely... (CoffeaThe botanical genus colloquially referred to as the “coffea genus,” which is comprised of over 120 individual species. These are generally opposite-leaved, evergreen shrubs or small understory trees... Canephora) from 1.6 to 2.2% caffeine. It is highly water soluble. The amount of caffeine in brewed coffeeBrewed Coffee refers to all coffee preparations produced by adding non-pressurized water to coffee grounds. Contrasted with espresso coffee, which is produced under pressure, brewed coffee is primarily... is directly proportional to how much ground coffee was used to make the cup.