Hello since many years (around 10 for sure) I've been suffering from ZERO libido. I'm 26yo otherwise healthy guy. It's clear that I have low dopamine and possibly serotonine problems going by the way I behave and feel etc but also confirmed but super low catecholamin test. Now - I just found out I have a heterozygous mutatation A1298C. Having read (scarce) info online stating that this mutation is connected to BH4 and therefor to neurotransmitters I'm quite positive this might be the root cause of my problems which for every doctor I saw (+100 easily) have been incomprehensible. I've tried countless drugs and supplements and not only they didn't cure me but normally there has always been absolutely no effects whatsoever, like sugar placebo pills. Be it a dopamine agonist, dopamine antagonist, testosterone injection, thyroid hormones etc. Could you point me in the right direction? Where do I start?