Ultra L Carnitine NutriRestore L Carnitine Side Effects & Risks The Right Way to Take L Carnitine to Boost Your Training L Carnitine Benefits, Side Effects & Dosage SelfDecode Supplements If you are like a lot of people, you may have never heard of carnitine but this important nutrient is critical for our body's ability to optimally burn fat required for energy. 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