heart symptoms. can or a bottle of an energy drink could have as much as 500mg of caffeine which is so way higher than you'd want a child to have. sometimes these drinks aren't labeled well, so you don't see what the ingredients can be, including the high amounts of caffeine, and a the child may think it's the same as any type overconsumption for kids, and even adults varies from the minor... they could even be more serious like problems with your heart rhythym, where your heart is irregular, it beats too fast or even seizures. the risks are particularly high, she says, for kids who