L Carnitine ProSupps.com L Carnitine 3000 Liquid 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 Icarifil, a Natural Mixture Based on L Citrulline and L Carnitine as a Novel Multicomponent Nutraceutical to Modulate ROS and PDE5