Andrew Lessman Acetyl L Carnitine 400 30 Capsules HSN Role of L carnitine in the transport of long chain fatty acids through Download Scientific Diagram Your dog's heart works hard and L Carnitine helps fuel every beat. This natural protein like substance supports healthy heart function by helping carry fatty acids to where the body needs them most. 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 Amazon.com: NOW Foods Acetyl L Carnitine 500mg, 200 Vcaps, Pack of 2 : Health & Household