WADA (World Anti-Doping Agency) claims to have a test for it.http://www.wtop.com/?nid=393&sid=1353584
Yes they say that. They said it was ready even back in 2000. But where are the positives? No athlete uses GH? One of the top antidoping experts, Don Caitlin admits there is no test, they are STILL working on it after a couple of decades.
You can cheat with any substance.