Research proves that a higher state of muscle anabolism is achieved with a blend of fast, medium & gradual release proteins. This is why GRS 9-Hour® Protein is the most effective muscle gain protein supplement available today. It contains precise levels of fast release whey plus gradual release polypeptide protein isolates & concentrates which metabolise gradually & release amino acids for up to 9 hours. Suitable for Vegetarians Free-from: Wheat, Gluten, Dairy, Soya