L Carnitine Nadara Clinic 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. 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 What Is Acetyl L Carnitine Good For? Uses & Benefits Understanding the Benefits and Uses of Carnitine in Health and Fitness Fitness Health Are L Carnitine and L Carnosine the Same? Anti Aging Systems