![]() ![]() However, there is wide variation in both how sensitive people are to the effects of caffeine and how fast they metabolize it (break it down). ![]() How much caffeine should you have in a day?įor healthy adults, the FDA has cited 400 milligrams a day -that’s about four or five cups of coffee-as an amount not generally associated with dangerous, negative effects. Instant coffee contains slightly less caffeine However, instant coffee generally contains slightly less caffeine than regular coffee One cup of instant coffee containing one teaspoon of powder may contain 30–90 mg of caffeine, while one cup of regular coffee contains 70–140 mg ( 11, 15, 16, 17).
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