Propionyl l carnitine: Health Benefits, Side Effects, Uses, Dose & Precautions Acetyl L Carnitine Dosage for Erectile Dysfunction: What Actually Works Glycine propionyl L carnitine and erectile dysfunction Do nutraceuticals work in erectile dysfunction? Although nutraceutical based treatments are often offered for erectile dysfunction (ED), their efficacy remains doubtful. In a recent meta analysis, the efficacy of available nutraceutical