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 Any proof of increasing androgen receptors with carnitine? L Carnitine Libido: What the Research Actually Shows L Carnitine and Testosterone Therapy for Men Men's Clinics 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