GNC Pro Performance 100% Casein is a slow-release protein naturally rich in glutamine and branched-chain amino acids (BCAA). 100% Casein contains 25 grams of protein, providing slow and steady amino acids for muscle growth and maintenance over several hours.* A perfect choice for overnight and long-period lean muscle recovery. 100% Casein supports your wellness and performance goals.                                              

• High-Quality, Gluten-Free Protein.
• Supports Muscle Recovery with Slow-Digesting Protein.
• Tested and certified Banned Substance Free.