This great tasting shake is part of a nutritionally complete, very low calorie diet program, which contains all of the nutrients required for safe and effective weight loss, including: 28g protein per serve to maintain muscle mass (40% more than standard OPTIFAST VLCD Shakes) Low in lactose Low in sugar Low GI Source of fibre Gluten free Thickshake style The OPTIFAST VLCD Protein Plus Shakes are satisfying, convenient and easy to prepare products that can be enjoyed for breakfast, lunch or dinner.