In this case, the NFL will not only condone doping but actually supply the dope. A new plan calls for about 70 former players to take human growth hormone in a controlled study, reports USA Today. Another 30 or so will get a placebo, and researchers will keep a close eye on before-and-after HGH levels. The idea is to get a better handle on what normal levels should be (the body does produce HGH naturally) as the league gets ready to put into place a testing policy. NFL.com reports that HGH tests on current players could start this season, with first offenders getting a four-game suspension.