Carnitine: Genetic Variants Affecting Mitochondrial Energy and Health 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 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 Architecture of androgen receptor pathways amplifying glucagon like peptide 1 insulinotropic action in male pancreatic cells ScienceDirect