Assessing the In Vitro and In Vivo Performance of L Carnitine Loaded Nanoparticles in Combating Obesity 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 Amazon.com: Nutrex Research Carniburn Liquid L Carnitine 3000mg Thermogenic Liquid Fat Burner for Men & Women with MitoBurn, InnoSlim, GBBGO Stimulant Free Metabolism Booster Sour Gummy Worms 31 SV : Effect of Acute and Chronic Oral l Carnitine Supplementation on Exercise Performance Based on the Exercise Intensity: A Systematic Review 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