TRT Doctors, Vigorous Steve and MPMD recommend oral L Carnitine Tartrate supplementation for increasing androgen receptors count or sensitivity. I remember Eric Trexler disagreeing with this. Have you changed your mind? Why are Hitting the Gym But Not Growing? The 'Secret Switch' Your Muscles Are Missing. Role of L carnitine in female infertility Reproductive Biology and Endocrinology Springer Nature Link Androgen receptor: structure, role in prostate cancer and drug discovery Acta Pharmacologica Sinica Androgen receptor density plays a meaningful role in muscle anabolism because it determines how strongly a muscle fiber responds to androgen signaling. Gabriel Alizaidy, MD, MS