Somethings thats perplexed me in the 8 plus years of being on TRT is it's little to no effect on libido, in fact many men including myself had better libido in borderline or fully hypogonadal states. Testosterone undoubtedly has a huge effect on libido, but something with TRT for a large number of guys is missing. I have read, researched and studied to no end trying to find a solution to no avail. Since considerably lowering my dose I feel much better overall, but libido is still much to be desired. There are some theories that LH being suppressed is the culprit, which in essence should be partially if not fully corrected with peptides such as HCG. HCG does nothing for my libido, in fact it further deteriorates. My total T level was 440ng prior to starting TRT at age 36 and I still had a much stronger libido than ever at any point on TRT. I did have other symptoms at this level which have mostly been alleviated. I've went as far as trying Wellbutrin due to norepinephrine and dopamine having a substantial effect on libido, but still no difference. I understand the bodies physiological processes are delicate and supremely complicated which makes treating any hormone deficiency a complicated process. There's something that changes with suppressing the hypothalamic region of the brain by implementing TRT that isn't seen by labs and I'm absolutely convinced of this. I as well as many others have great labs on paper but still suffer from low libido and to some degree impotence while on TRT. Through all my reading over the last decade, libido by far is the hardest thing to attain on TRT. Hopefully one day through research and trials someone will figure it out. My father has had his hormones checked and he's now 72y/o and comes back a little over 400ng. He states he's as horny as he's ever been lol. There are even cases of men that aren't symptomatic with T levels in the 2-300ng range that still have strong libido. For the life of me, I cannot make sense of this.