L Carnitine: Benefits, side effects, and dosage 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. Acetyl L Carnitine What Is L Carnitine? L Carnitine Benefits, Dosage & When To take? Myprotein AU Berberine vs L Carnitine , Which one should YOU take?, Both are metabolic powerhouses, but they work in completely different ways , Berberine HCL is natures metformin., 1. Activates AMPK (your cells