Why is it that it is ok to run HCG on cycle and not Nolva or Clomid. I understand that all 3 are different substances but they all send signals to the testes to start working again. When I first came to BOP I mentioned I was taking Nolva and Clomid everyday to keep the boys swimming, like HCG is used for. I got a decent amount of negative reviews from members saying how this may prevent some gains and is not the way to go. But all 3 substances tell the body to get the testes working. Please do not tell me how they are all different based off of what they do aside from getting your balls working again, because that is what I am wondering. Why you can take one to get your balls turning on during cycle, and not the others.