WHAT IS L'CARNITINE? L'Carnitine is like a taxi for fat molecules, helping them get into cells to produce energy. It's found naturally in meat and dairy and can help with burning fat, When should I take L Carnitine? Inshape Nutrition L Carnitine The Complete Guide to L Carnitine Uses and Dosage Sova Health L Carnitine plays an important role in the larger metabolism equation: helping your body use fat efficiently as fuel. Learn more about the science on this week's post on The Wellness Edit. When to take L carnitine: Dosage, forms, and side effects