My son's boss buys "energy" drinks for his construction crew. My son, who's the foreman, complains that none of them can function without it. I talked him out of using the drinks himself, reminding him that there is no energy in those drinks. Any energy you get comes out of your own body, not the can, and it's a loan you have to pay back.
Energy drink TV commercials piss me off. They are misleading, and they should be required to warn of side-effects such as hypertension, headaches, interrupted sleep patterns, irregular heartbeat, inability to focus, even potential death from heart attack.