How old do you have to be buy a 5 hr energy drink?

5-Hour Energy drinks are generally marketed to adults and are not recommended for children or teenagers. While there are no specific age restrictions on purchasing 5-Hour Energy, it is important to note that the drink contains high levels of caffeine and other stimulants that can be harmful to young people. For safety reasons, it is generally recommended that individuals under the age of 18 avoid consuming 5-Hour Energy drinks.