Well what and where is this human grade gear in the U.S. ? Let me see Anavar, Test, Anadrol - is that it? From the pharmacy? right!!
I think it would just be a more reliable quality to go with human grade but I would not want to pay for this stuff at a pharmacy, so otherwise where to find it? The hook-ups I have heard about are all vet gear.
I tend to be somewhat distrustful, not by nature, but due to experience. I remember the original MetRX protein powder. That stuff was great and I took it all the time. Then something happened - my system just could not handle it any more. Some might say that my body developed a reaction or something. But I say after they got to a certain volume and success, somehow the quality degraded - maybe the conspiracy in me, would say they did this to cash in and be more price competitive. I have seen this happen in many different areas- restaurants for instance. And beer. And not necessarily because of conspiracy. It is just harder to maintain quality control on larger volumes of product. Think about it. I am not pointing any fingers, but with human grade I would have less to worry about.