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A 6-ounce (oz) cup of brewed coffee and an 8.4-oz can of Red Bull provide the same energy boost for about the same amount of ...
One 8.4 fl. oz. can of Red Bull Energy Drink contains 80 mg of caffeine. The 80 mg of caffeine contained in one 250-ml can of Red Bull Energy Drink is about the same amount as in a cup of coffee.