The Role of l Carnitine in Mitochondria, Prevention of Metabolic Inflexibility and Disease Initiation Anabolism often gets treated like a single switch, but muscle growth depends on several systems that work together after training creates the initial stress. Gabriel Alizaidy, MD, MS Role of androgens and androgen receptor in control of mitochondrial function American Journal of Physiology Cell Physiology American Physiological Society L Carnitine and Testosterone Therapy for Men Men's Clinics 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 Tartrate Supplementation for 5 Weeks Improves Exercise Recovery in Men and Women: A Randomized, Double Blind, Placebo Controlled Trial