Well I've decided to put my .02 into the ring and say something about supplemets. This law is Public Law 103-417, and can be found by doing a search on its title, 103rd congress, at Thomas. Most, if not all, of the muscle mags are owned by supplement companies. The mags have become massive advertisements masqueading as articles.
Some supplements really do work, creatine, or for that matter, some of the prohormones.
In any case there is a great deal of good technical information ot there on the web. Medline is an online searchable database of Journal articles in the broad area of medicine. Highly recomended, but tough going. There are various sites with free access to Medline. Just do a net search.