Muscle Milk Pro Series Protein Shakes provide all 9 essential amino acids, which the body is not able to produce, with an immediate and prolonged protein delivery in the body. For healthy muscles, protein is essential and the timing of your intake of protein is crucial. The goal is to keep your body’s protein supply at peak levels so you have available nutrients to maintain, repair, and build your muscles. What does this mean? Muscle Milk Pro Series Protein Shakes provide high-quality proteins that are designed to keep your body in positive protein balance to help promote exercise recovery, provide sustained energy and help build and maintain lean muscle. Key Features: 40g high-quality protein 200 calories 1g sugar. Excellent source of 20 essential vitamins and minerals 5g fiber gluten Free are suitable for most individuals that are sensitive to lactose.