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110mg is about two cups of coffee. no, it's not a lot of caffeine. in adults, fatalities have occurred with doses of approximately 10 grams. Source(s): Pharmacist. sal1970 Â· 6 years ago.
More than 90 percent of U.S. adults use caffeine regularly, the study says, and, on average, they consume about 200 mg per day. For healthy adults, the FDA says 400 mg a day is OK. But consuming much more than that can have dangerous, negative effects. And the milligrams add up quickly.