For athletes, pro-hormones can be a leg up on the competition, an extra step in an already stringent training regime. But for many other consumers who are just looking to get cut up in the weight room ...

Correspondence to L M Castell, Green Templeton College, University of Oxford, Oxford OX2 6HG, UK; lindy.castell{at}gtc.ox.ac.uk Part 34 is dominated by a review of prohormones, or more specifically, ...