Only COMPLETE MASS 600 by Optimum Health brings together the highest-quality, anabolic, championship-grade calories, proteins and carbohydrates in one easy-to-use, highly-effective formula. By combining a scientifically formulated professional-caliber blend of time-released proteins and an anabolic carb matrix that give you 600 growth-triggering calories per serving, COMPLETE MASS 600 builds serious size. The time-released, professional-strength protein blend in COMPLETE MASS 600 contains a full 50 grams of highly bio-available fast, medium and slow-acting proteins that supply your hard-working muscles with a steady stream of growth-triggering amino acids for up to five continuous hours. As a result, you get an all-day positive nitrogen balance that prevents muscle wasting and that triggers constant muscle growth! 6 lbs., Available in Rich Chocolate Cake, Strawberries & Creme, and Vanilla Ice Creme flavors.