Glycine Propionyl L Carnitine and Erectile Dysfunction: A Closer Look at the Evidence Propionyl L carnitine induces eNOS activation and nitric oxide synthesis in endothelial cells via PI3 and Akt kinases ScienceDirect Acetyl l carnitine plus propionyl l carnitine improve efficacy of sildenafil in treatment of erectile dysfunction after bilateral nerve sparing radical retropubic prostatectomy Urology Propionyl L Carnitine for Erectile Dysfunction: What the Evidence Shows and How to Approach It