L Carnitine Benefits for Male Erectile Dysfunction Does L carnitine cause erectile dysfunction? Amazon.com: Promescent VitaFLUX Nitric Oxide Supplements for Men, Fast Acting Male Enhancing Pills for Stamina, Size & Performance, L Arginine L Citrulline L Carnitine (30 Servings) : Health & Household Supplement of the week: L Carnitine! This one doesn't just boost fat metabolismit can also improve recovery, endurance, and even brain function. If you're serious about performance and longevity, this might be Carbamide Forte L Carnitine L Tartrate 1000mg Capsules for Men & Women Himkhand L Carnitine Benefits for Male Erectile Dysfunction