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 carnitine in disease Nutrition & Metabolism Springer Nature Link Frontiers Effects of L carnitine supplementation on lipid profile in adult patients under hemodialysis: a systematic review and meta analysis of RCTs The effect of l carnitine supplementation on mortality and clinical outcomes in ventilator dependent critically ill patients with obesity and COVID 19: Protocol for a randomized double blind placebo controlled trial ScienceDirect