Tests, papers and social lives deprive college students of much needed rest, leaving them with a need for energy. To keep the pace, energy drinks packed with caffeine have been popular choices—although not healthy ones. Now there’s an even more serious risk. Four Loko, with alcohol content added to the revved-up mix, poses a critical danger to consumers, as do similar drinks such as Joose, Moonshot and Core Gravity HG. Four companies have complied with an FDA request to stop