If you're putting in the work but the scale isn't moving, your body might just need a little help tapping into its fat stores. That's where L Carnitine comes in. It's not a Systemic regulation of L carnitine in nutritional metabolism in zebrafish, Danio rerio Scientific Reports The effects of L carnitine supplementation on lipid profiles in adults: A systematic review and dose response meta analysis ScienceDirect Nutrex Research Liquid Carnitine 3000 Metabolism & Endurance Booster Fat Burning eBay 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