Serum l carnitine and vitamin D levels may be low among oral sildenafil citrate non responders International Journal of Impotence Research For a 70 year old man with type 2 diabetes mellitus, hypertension, and a 10 month history of erectile dysfunction, what supplements can be initiated? Acetyl L Carnitine Effects On Erectile Dysfunction [K91oLN883SE] Glycine propionyl L carnitine and erectile dysfunction Efficacy and tolerability of sildenafil larginine combination relative to sildenafil alone in patients with organic erectile L Carnitine Erectile Dysfunction: What the Evidence Actually Shows