Unless you have trusted source, or get it directly from the company or clinic, you don't know. I have used GH in the past that was legit before(when I originally got it from the guy)because I got all the symptoms of GH. But I have used some from the same guy where I got signs of HCG, horny as hell and on no AAS. So, to sum up, know your source Benz, contact Mods for input.