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 ScienceDirect How Much L Carnitine Per Day: Expert Guide The Science of Good Health Assessing the antioxidant and metabolic effect of an alpha lipoic acid and acetyl L carnitine nutraceutical ScienceDirect 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