Additionally, Red Bull has sugar-free options, including Red Bull Zero and Red Bull Sugarfree, which are made with the artificial sweeteners aspartame and acesulfame K instead of sugar ( 3). Of course, not everyone who drinks Red Bull will experience an increase in high-risk behaviors. Still, it’s important to be aware of the potential risks, especially in younger adults and when alcohol is involved. May lead to caffeine overdose and possible toxicity As one small 8.4-ounce (260-ml) can of Red Bull provides 75 mg of caffeine, drinking more than 5 cans per day could increase your risk of caffeine overdose ( 2). Research has shown an association between drinking Red Bull and increased high-risk behavior, especially when combined with alcohol ( 1).

However, the average half-life of caffeine in the blood ranges from 1.5–9.5 hours, which means it could take up to 9.5 hours for your caffeine blood levels to drop to half of its original amount ( 29). As a result, it’s hard to determine the exact amount of Red Bull that could lead to caffeine overdose. The bottle holds 500ml of the liquid of your choice, hot or cold, and can maintain the temperature of your drink for up to 6 hours, or longer for cold drinks.While current recommendations call for limiting caffeine to no more than 400 mg per day in healthy adults, cases of caffeine-related deaths have primarily been in individuals with unusually high intakes of 3–5 grams of caffeine per day ( 28, 31). A change in heartbeat rhythm can lead to certain types of arrhythmias that may result in sudden death, especially in those with high blood pressure or heart disease ( 39). It’s also high in several B vitamins, including thiamine (B1), riboflavin (B2), niacin (B3), B6, and B12 ( 2). In fact, a review in 310,819 adults found that drinking 1–2 servings of sugar-sweetened beverages per day was associated with a significant 26% increased risk of type 2 diabetes ( 14). Furthermore, the study noted that energy drinks were twice as harmful to tooth enamel than soft drinks ( 17). May negatively affect kidney health

One study found that college-aged students who drank energy drinks and alcohol together were more likely to drink and drive and experience serious alcohol-related injuries than when alcohol was consumed alone ( 25). One recent study in 34 healthy adults found that drinking 32-ounces (946 ml) of Red Bull daily for 3 days resulted in significant changes to the interval between heartbeats ( 39). Research indicates that drinking acidic beverages can damage tooth enamel, which is the hard outer coating that helps protect your teeth against decay ( 15). Though Red Bull remains a popular beverage, research suggests that it may negatively affect your health. Can increase blood pressure and heart rate Current recommendations call for limiting caffeine to 100 mg or less per day in adolescents aged 12–19. Therefore, drinking more than one 8.4-ounce (260-ml) serving of Red Bull could increase the risk of caffeine overdose in this age group ( 28).

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Several studies in healthy adults have shown that drinking one 12-ounce (355-ml) can of Red Bull significantly increased blood pressure and heart rate levels within 90 minutes and up to 24 hours after consumption ( 6, 7, 8, 9). Additionally, while research is limited, drinking Red Bull could worsen heart health and be life-threatening in individuals with pre-existing high blood pressure or heart disease ( 11). May increase type 2 diabetes risk