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 Buy Superhuman Liver Health Gummies Milk Thistle, L Ornithine L Aspartate and L Carnitine Provides Support and Detox Boosts Function Balances Hormones Lime Flavour Vegetarian (30 gummies) Online at Low L Carnitine and its carrier SLC22A5 mediated sensing and signaling Download Scientific Diagram L carnitine is a naturally occurring amino acid structure that is made in the human brain, liver, and kidneys. L carnitine plays a critical role in energy production, as it converts fat into energy.