Carnitine: the claims and why it may not work 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 Role of L carnitine in exercise training: Anti inflammatory, antioxidant, and metabolic interactions ScienceDirect Carnitine: the claims and why it may not work L Carnitine Promotes Weight Loss in Overweight Dogs IAMS L Carnitine: Benefits, Side Effects, And Dosage, Per Dietitians