Is L Carnitine safe for athletes at doses up to 6000 mg day? Consensus Didn't another study show carnitine was good for the heart? L carnitine tartrate supplementation in the fight against infectious disease 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 Effects of l carnitine supplementation on weight loss and body composition: A systematic review and meta analysis of 37 randomized controlled clinical trials with dose response analysis Clinical Nutrition ESPEN Compounded Carnitine (L) Injection Empower Pharmacy