The effects of L carnitine supplementation on lipid profiles in adults: A systematic review and dose response meta analysis ScienceDirect 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 Frontiers Ameliorating effects of L carnitine and synbiotic co supplementation on anthropometric measures and cardiometabolic traits in women with obesity: a randomized controlled clinical trial Acetyl L Carnitine Study NOW Foods Does L Carnitine Help Erectile Dysfunction?