Which Alcohol Goes Best With Coffee? 8 Ways To Kick Your Favorite Drink Up A Notch - coffee adult

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Apr 30, 2018 · Coffee doesn't just keep you awake — it may also make you smarter. The active ingredient in coffee is caffeine, which is a stimulant and the most commonly consumed psychoactive substance in the Author: Kris Gunnars, Bsc.

Up to 400 milligrams (mg) of caffeine a day appears to be safe for most healthy adults. That's roughly the amount of caffeine in four cups of brewed coffee, 10 cans of cola or two "energy shot" drinks. Keep in mind that the actual caffeine content in beverages varies widely, especially among energy drinks.