Healthy adults can drink up to five 8.4 fl oz cans of Red Bull per day without raising safety concerns

. This is based on the European Food Safety Authority's (EFSA) finding that a caffeine intake of up to 400 mg per day is safe for healthy adults

. One 8.4 fl oz can of Red Bull contains 80 mg of caffeine, which is about the same amount as in a cup of home-brewed coffee

. However, it is generally recommended to only have one 8.4 fl oz can of Red Bull a day due to the drink's sugar content, which can cause negative side effects if you consume too much

. Pregnant or nursing women should limit their caffeine intake to 200 mg per day