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. Let's talk about L carnitine a powerful ingredient found in our puppy food that plays a vital role in your little one's development. , , L carnitine is not just any ordinary component. It's a L Carnitine for Dogs: Benefits, Uses & Side Effects (Vet Reviewed) Dogster Veterinary Strength Healthy Heart for Dogs & Cats