L Carnitine for Dogs: Key Benefits that Every Pet Parent Must Know! L Carnitine and Male Fertility: Is Supplementation Beneficial? Dog Health: Optimizing Your Best Friend's Health & Longevity Life Extension FLYING DOG L CARNITINE a unique product to stimulate the dogs body 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