L Carnitine Better Than Testosterone in Treating 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 Combination therapy with topical alprostadil and phosphodiesterase 5 inhibitors after failure of oral therapy in patients with erectile dysfunction: a prospective, two arm, open label, non randomized study International Journal of Impotence Research Swanson Vitamins Propionyl L Carnitine HCl & Glycine Support Glycine propionyl L carnitine and erectile dysfunction