How long will a Red Bull keep me energized?
                                
                                
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                                    5 min read                                
                            
                                According to the Food and Drug Administration (FDA), a healthy adult can safely consume up to 400 mg of caffeine per day. The energy boost from a single can of Red Bull, which typically contains around 80-111 mg of caffeine depending on the country and can size, is not as long-lasting as many believe and is influenced by several personal factors.