IQ-elevating agents that can boost brain power are being used by over 10% of university students. But how do these cognitive-equivalents of anabolic steroids for the brain actually work, what are their effects and are they safe? Moreover, is the advantage they confer an ethical one? And if not, should universities be screening students ahead of exams to deter their use? Meanwhile, in the news this week, we find out how lasers can cut complications in cataract surgery, why some people are allergic to wine, we hook up with the highlights from the world's biggest neuroscience meeting including... Like this podcast? Please help us by supporting the Naked Scientists