L Carnitine Force Factor Acetyl L Carnitine (ALCAR) Supplement for Horses Mad Barn L Carnitine Acetyl L Carnitine is more thought of as a fat burner. It's actually powerful tool for athletes looking to improve endurance, energy, and mental performance. Here's how you can integrate it into your routine for Corebolics L Carnitine Liquid (450 ml, 30 serving) Ingredient Spotlight: L Carnitine Source: Biosynthesised in the body from the amino acids Lysine and Methionine, L Carnitine is a conditionally essential nutrient involved in energy metabolism and fat transport. Key Benefits