In her blog, Lab Notes, NEWSWEEK's Sharon Begley writes about a new potential source of doping for athletes:

Move over, steroids. Take a hike, human growth hormone. If scientists are right, a simple pill can enhance and even mimic the beneficial effects of exercise. At least in mice. But some people may not be waiting for research to show that the compounds work in people as well. The scientist who discovered the drugs, which are a cinch for chemists to synthesize, believes they may already be in athletes’ equipment bags—since anti-doping agencies had no idea they should even be on the lookout for them.

Read the whole thing here.