Can L Carnitine Support Energy Levels and Exercise Recovery for Long COVID and ME CFS Patients? RTHM L Carnitine is one of the most hyped weight loss supplements online but here's what most won't tell you: Your body naturally produces L Carnitine using amino acids l, and a healthy person usually Carnitine Tartrate L Carnitine doesnt magically burn fat, it helps your body use fat as energy. Combine it with training and consistency, and youll feel the difference @Marybosch shows us how L Carnitine will boost