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 l Carnitine l tartrate supplementation favorably affects biochemical markers of recovery from physical exertion in middle aged men and women ScienceDirect L Carnitine Libido: What the Research Actually Shows Effects of l Carnitine on the Follicle Stimulating Hormone, Luteinizing Hormone, Testosterone, and Testicular Tissue Oxidative Stress Levels in Streptozotocin Induced Diabetic Rats Nourollah Rezaei, Tahereh Mardanshahi, Majid Malekzadeh Shafaroudi