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 Systemic regulation of L carnitine in nutritional metabolism in zebrafish, Danio rerio Scientific Reports L carnitine Injection TACOMA VET MEDICATIONS L Carnitine 500mg ml Solution Renatus Labs Compounded Carnitine (L) Injection Empower Pharmacy The Nutraceutical Value of Carnitine and Its Use in Dietary Supplements