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 Acetyl L Carnitine 500mg Cognitive Support Carlson Icarifil, a Natural Mixture Based on L Citrulline and L Carnitine as a Novel Multicomponent Nutraceutical to Modulate ROS and PDE5 Ronnie Coleman L Carnitine XS 4000 Sportsfuel Supplements NZ