Milk? .........
...no seriously it's got alot of good stuff for ya, like the lactos for energy (basically sugar) Ca+ so that your muscles work properly. Of course you probley want to drink it before or after workout. There was test where one group of football players drank milk a few hrs. bafore a game vs. energy drink, and the milk group did better....or it could all be B.S. that I heard from someone else. But it does sound reasonable to work...........other than that water