What are Natural Sources of Caffeine?
Caffeine is a stimulant found in many plant species. The most common natural sources of caffeine are coffee, tea, and cocoa, although the last one contains very low amounts in comparison. Although the amount of caffeine varies according to brand and method of preparation, coffee is, without a doubt, one of the most popular natural sources of caffeine. A six-ounce cup of instant coffee contains about 60 milligrams of caffeine, while the same amount of automatic-drip coffee contains around 140 milligrams (mg). Tea, another of the most popular natural sources of caffeine, can also have varying amounts of the substance. Green tea is the lowest, with only 35 milligrams per six-ounce cup; black tea can contain up to 75 milligrams, depending on brand and country of origin.
