However, some studies have turned up mixed results. For comparison, a 12-ounce serving of regular Coca-Cola contains 34 mg of. The exact caffeine content of Diet Coke can vary depending on the country and location, but it typically contains around 46 mg of caffeine per 12-ounce (355 mL) serving. SummaryĬoffee could improve physical performance and endurance when consumed before exercising. Diet Coke contains a moderate amount of caffeine, which is a central nervous system stimulant. However, results varied, so the researchers also noted that caffeine may affect people differently ( 33). One review of nine studies reported that drinking coffee before exercise improved people’s endurance and decreased their perceived exertion, compared with a control group ( 31).Īnother study in 126 older adults found that drinking coffee was associated with improved physical performance and faster gait speed, even after the researchers adjusted for factors like age, belly fat, and physical activity levels ( 32).Īdditionally, a large review reported that moderate caffeine consumption could slightly improve power output and time-trial completion time. Still, more research is needed.Ĭoffee is often used as an ergogenic aid by athletes looking to improve performance and increase energy levels ( 30).Īn ergogenic aid is also called a performance enhancer. SummaryĬoffee could be associated with a lower risk of death, regardless of other factors, like age, weight status, or alcohol consumption. See more: Does Diet Dr Pepper Have Caffeine What is the Highest Caffeine Drink DynaPep is the highest caffeine drink on the market, at 714.3 mg per fluid ounce. This is higher than the amount of caffeine in Coca-Cola. However, more research is needed to determine whether this could also apply to humans. In the United States and Canada, the caffeine content in Dr. Interestingly, one test-tube study showed that coffee was able to significantly extend the life span of yeast by protecting against free radicals and DNA damage ( 29). Furthermore, drinking at least one cup of coffee per day was also associated with a lower risk of death from cancer ( 28). Similarly, another study in 1,567 people found that drinking caffeinated coffee was linked to a lower risk of death after 12 and 18 years of follow-up. Some research suggests that coffee could help extend longevity, thanks to its multitude of potential health benefits.įor example, one review of 40 studies concluded that drinking two to four cups of coffee daily was associated with a lower risk of death, regardless of factors like age, weight status, and alcohol consumption ( 27).
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