Should I use L Carnitine on rest days or just before workouts? Burn fat smarter, not harder., Most people think fat burn = more cardio. Truth is, your body needs the right tools to actually use stored fat as fuel., Thats where L Carnitine comes in its What is L Carnitine, and what does it do? Fit Nutrition Australia L Carnitine for Fat Burning: Boost Energy & Lose Weight Naturally Malook When to Take L Carnitine for Optimal Training Benefits Transparent Labs