L Carnitine Benefits for Fat Burning and How to Use ICONFIT Amazon.com : XCEL Taurine for Dogs 1000 mg Supplement with L Carnitine, Quarter Scored Tablets (250 mg Split), Up to 240 Servings, Supports Heart, Eye & Energy Health : Pet Supplies L Carnitine and Male Fertility: Is Supplementation Beneficial? 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 L Carnitine for Dogs: Benefits, Uses & Side Effects (Vet Reviewed) Dogster