How to Take L Carnitine Correctly to Boost Your Training Bodybuilding.com L Carnitine: Benefits, Uses, Side Effects, and More L Carnitine Is it Worth Taking? Ideal Nutrition L Carnitine is an amino acid that plays a role in energy production, by helping transport fatty acids into the mitochondria. Mitochondria are tiny powerhouses within cells that make energy. Did you know L carnitine, a vital amino acid, is naturally produced by your body and found in various foods? While acetyl L carnitine (ALCAR) can be a beneficial supplement for some, most people get