For what it’s worth, my own battle with libido was for nearly 4 years after starting TRT with a local urologist in a small town and then going to Defy after the urologist basically broke up with me in an email saying that he couldn’t help me and to maybe try “one of those new online clinics”.
It was a combination of many things: some seemingly unimportant or that which I didn’t want to admit and not just hormones. There is never only 1 cause. The most difficult for myself and for many men is the psychological part. Do not ever underestimate just how destructive your thoughts and feelings, stress, work, your relationship, (and perhaps disappointingly) everything going on in your life is to your sex life.
The medications fix the hormone problems and imbalances. So if those are not working then my advice is to expand your search.
All that said, Defy does have 2 products I would recommend. Tri-mix gives a guaranteed erection, for hours. It is literally what porn stars use and no it doesn’t hurt. Sometimes not having to worry about that is enough to gain a lot of interest back.
The other one is Bremelanotide (PT-141). It does cause nausea, like a sour stomach for 15-30 minutes and takes between 2-4 hours to feel the effect. Most accounts of it online, both good and bad are under-dosed. You would not believe what 2mg of it does to you. It makes you want to have sex so bad that it almost hurts. And it works for both men and women.