How Much Caffeine Is in a Can of Pepsi?

According to Pepsico, the manufacturer of Pepsi, there is 39 mg of caffeine in one 12-ounce can of the carbonated beverage. Sites such as Caffeine Informer report a higher amount of caffeine, but all information agrees that one 12-ounce can of Pepsi is in the 38-39 mg range.

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