Carnitine: the claims and why it may not work Running and Weight Loss: The Synergistic Effects of L Carnitine and Cu RunStrong Weight Loss Supplements for Athletes: What Works, What Doesn't, and What to Avoid L carnitine is a fat loss cheat code! If your goals are for fat loss and you're not incorporating L carn, read this NOW!!! Link to shop in bio! Like, save, 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