So I've been on TRT a few years. Tried injections, creams, HCG, AI's, DHEA, pregnenalone, and various combination of them all. I never really found the silver bullet I was looking for. By all accounts, my hormones are at optimal levels but my libido is very low and erections are so so with Cialis. So I've started to wonder if maybe I have something out of whack in the neurotransmitter department since they play an important role in sexual function. I was looking at a comprehensive neurotransmitter panel from Life Extension. Do any of you have any experience with this? I've read mixed reviews about the accuracy of such tests (most of what I've read was a few years old). Any help is appreciated.