I don't think I've ever been tested for my carnitine levels so hats off to your doctor for having the foresight to check it for you.

Carnitine is found in alot of products, including: dairy products, such as cheese and milk; red meat, such as beef and lamb; chicken, turkey, fish, leafy green vegetables, cereals, avocados, apples, nuts and bananas. I would suggest eating more of these foods as well as taking a good supplement.

Did he indicate if the deficiency was behind your symptoms?