L Carnitine: Benefits, Side Effects, FAQ, Sources, and Dosage Amazon.com: Now Foods L Carnitine 500 mg 180 Capsules : Health & Household Codeage Liposomal Acetyl L Carnitine 500mg Supplement 3 Month Supply L Carnitine Benefits for Male Erectile Dysfunction: What the Evidence Shows Benefits of Acetyl L Carnitine Simply Supplements Early research into L carnitine was often cited as underwhelming, showing negligible changes in muscle carnitine content and fat loss outcomes. However, these findings may have been limited by a short study window