One 8.4 fl oz can of Red Bull Sugarfree contains 80 mg of caffeine, about the same amount as in a cup of home-brewed coffee.One 12 fl oz can of Red Bull Sugarfree contains 114 mg of caffeine.One 16 fl oz can of Red Bull Sugarfree contains 151 mg of caffeine.One 20 fl oz can of Red Bull Sugarfree contains 198 mg of caffeine.Caffeine is a key ingredient of Red Bull Energy Drink. The European Food Safety Authority (EFSA), US Food and Drug Administration (FDA) and Health Canada agree that single doses of caffeine up to 200 mg and intakes up to 400 mg of caffeine per day is safe for most healthy adults. However, pregnant and nursing women should limit their caffeine intake to 200 mg per day.
