L Carnitine bodybuilding Lose weight with carnitine The Right Way to Take L Carnitine to Boost Your Training L Carnitine is back in stock Carnitine helps burn more calories and produce more energy. L Carnitine is an amino acid, a building block for proteins, which is naturally produced in the body. L Carnitine 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