Matrix Nutrition Monster Protein Weight Gainer - Mass Gain Powder Shake (4KG, Strawberry). Description: Matrix Monster Protein is the highest protein content weight gainer in our range, scientifically engineered to only develop quality lean muscle mass. This is achieved by possessing a Protein / Carbohydrate content close to a 1:1 ratio, ensuring the accelerated development of lean defined muscle in place of excess 'bulk'. Ingredients: Matrix Protein Blend - (Whey Protein Concentrate (Milk), Milk Protein Concentrate, Whole Milk Protein, Soya Protein Isolate). Dextrose Monohydrate, Maltodextrin, Micronised Oat Flour, Waxy Maize, Peptide Bonded Glutamine (derived from Wheat Protein), Flavouring, Natural Colouring, Xanthan Gum, Acacia Gum, Sweetener: Sucralose. Allergy Advice For allergens, including cereals containing gluten, see ingredients in bold. May also contain nuts, gluten and eggs. Directions: Mix 1.5 scoops with 350-400ml of water or milk in a shaker or blender, as requi...