L arginine and Erectile Dysfunction: Uses, Side Effects, Benefits Allo Health Blog Did you know L carnitine, a vital amino acid, is naturally produced by your body and found in various foods? While acetyl L carnitine (ALCAR) can be a beneficial supplement for some, most people get Rexdrive Amino with L Arginine HCl, L Citrulline, Acetyl L Carnitine Arginate DiHydrochloride, and Glycine Propionyl L Carnitine HCl, Men's Formula, 60 Veggie Capsules Carnitine Carnipure powder Nutrimuscle