L Carnitine Supplements Nature's Best Benefits of L carnitine injections are aplenty! This injection is a great way to boost your energy levels, help with weight management, and even promote healthy heart function. Studies show that What Is Carnitine and Why Is It Important? The Amino Company L Carnitine, 500 mg, 60 Vegetarian Capsules What is carnitine? Carnitine is produced in the body from the amino acid lysine and naturally occurs in some foods. It supports energy metabolism and muscle function, which are important factors in