The energy drink industry began in the 1980s with products like Jolt Cola and later Josta. It grew significantly between 2003-2008, with energy drink users up 17 million. The main purchasers are adults aged 18-24 and 25-34, though use among women and Hispanics/Blacks is growing. Leading brands are Red Bull, Monster, and Rockstar. While sales are strongest in convenience stores, supermarkets and clubs are gaining share. The industry focuses promotions on action sports and alternative lifestyles but faces concerns over high caffeine levels and potential overuse by teens.