GNC Pro Performance 100% Casein Protein - Chocolate Supreme is a high-quality, gluten-free protein supplement designed to support muscle recovery with slow-digesting protein. It contains 25 grams of protein per serving, providing a steady release of amino acids for muscle growth and maintenance over several hours. This makes it an ideal choice for overnight and long-period lean muscle recovery. The product is also certified banned substance-free, ensuring its safety and efficacy for athletes and fitness enthusiasts.