Ginseng is a dried root and is a member of the Araliaceae (ivy) family. Ginseng contains a lot of different substances; some are even hormone-like. The studies made on ginseng are quite contradictory. Probably it has some effects but an energy-drink containing ginseng couldn't possibly produce a noticeable effect. The strongest effect noted from ginseng has been in elderly people after long term use and with much higher dosages than found in the energy drinks.