Carnitine Erectile Dysfunction NCBI: What the Research Actually Shows 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 Doctor's Best L Carnitine Fumarate with Biosint Carnitines, 855 mg, 60 Compounded Arousal Cream Empower Pharmacy Serum l carnitine and vitamin D levels may be low among oral sildenafil citrate non responders International Journal of Impotence Research