skeletal muscle
Metabolism Series by Dr. Layman

7. Muscle Metabolism: The Secret to Boosting REE?

Muscles are the Key to Your Metabolic Type

Skeletal muscle is the largest metabolic organ in our bodies. It makes up about 40% of total body weight and accounts for nearly 50% of body protein. Believe it or not, your muscles determine a lot about your metabolism, and they ultimately determine the precise mixture of protein, carbohydrates, and fats that are best for optimizing your metabolism.