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Toxic doses, over 10 grams per day for an adult, are much higher than typical doses of under 500 milligrams per day. A cup of coffee contains 80â175 mg of caffeine, depending on what bean (seed) is used and how it is prepared (e.g. drip, percolation, or espresso). Thus it requires roughly 50â100 ordinary cups of coffee to reach a lethal dose.
Toxic doses, over 10 grams per day for an adult, are much higher than typical dose of under 500 milligrams per day. A cup of coffee contains 80â175 mg of caffeine, depending on what bean (seed) is used and how it is prepared (e.g. drip, percolation, or espresso).affeine is also a common ingredient of soft drinks, such as cola, originally prepared from kola nuts. Soft drinks typically contain 10 to 69 milligrams of caffeine per 12 ounce serving. By contrast, energy drinks, such as Red Bull, can start at 80 milligrams of caffeine per serving.