The Serious Mass Gainer formula supports muscle growth and repair utilising 50-grams of quality whey protein blend and 256-grams of carbohydrates per serving to provide long-lasting energy and boost daily calorie intake. Fats and saturates are kept low to maintain a supreme macronutrient profile with just 4.7-grams within a 340-gram shake.

Produced by Optimum Nutrition, the large 5.45kg Serious Mass packs are easily resealable and come with 16 large servings to keep you fuelled throughout your busy day. Coming in six tasty flavours including the special edition, Chocolate Mint, there's something suited to everyone's tastebuds.

• 5450g = 16 servings
• 340g = 1 serving

Ingredients: Maltodextrin, WHEY Protein Concentrate [MILK], Calcium CASEINATE [MILK], Flavourings, Cookie Crumb (1.4%) (WHEAT Flour [GLUTEN], Sugar, Vegetable Fats: Palm, Rapeseed; Fat-Reduced Cocoa Powder, Sodium Chloride), Creatine Monohydrate, MILK Mineral Complex, Medium Chain Triglycerides [MILK], EGG Albumen, Dipotassium Phosphate, Sodium Chloride, Vitamin & Mineral Blend (Sodium L-Ascorbate, Ferric Pyrophosphate, D-Alpha-Tocopheryl Acetate, Nicotinamide, Zinc Oxide, Retinyl Acetate, Calcium D-Pantothenate, Sodium Fluoride, Manganese Sulphate, Potassium Iodate, Cyanocobalamin, D-Biotin, Chromium (III) Chloride, Pteroylmonoglutamic Acid, Cholecalciferol, Sodium Selenite, Cupric Citrate, Pyridoxine Hydrochloride, Thiamine Hydrochloride, Phylloquinone, Riboflavin, Sodium Molybdate), Glutamine Peptides [WHEAT GLUTEN], L-Glutamine, Magnesium Oxide, WHEY Powder [MILK], Inositol, L-Ascorbic Acid, Sweetener (Sucralose), Antioxidant (Tocopherol-Rich Extract), Calcium D-Pantothenate, Pteroylmonoglutamic Acid.

For allergens, see ingredients in uppercase.

The ingredients list and allergens are based on the Cookies and Cream Optimum Nutrition Serious Mass Gainer Protein Powder and can vary slightly depending on the flavour selected.

Regulated Name: Ready To Mix Powder with Protein, Carbohydrates, Vitamins, Minerals and Sweetener.

The nutritional information is based on the Banana Serious Mass Gainer Optimum Protein Powder and might vary slightly on other flavour variations.

For the best results, consume Optimum Nutrition Serious Mass shakes between meals when you need extra calories or after your workout to support your recovery.

Mix two heaped scoops with 710ml of water or milk then add a few ice cubes and, if desired, other calorie-contributing ingredients and blend well.

• Weight: 5450g-Grams
• Barcode: 5060245601061
• Production Country: United Kingdom
• Storage: Store protein in a cool, dry place away from direct sunlight
• Brand: Optimum Nutrition
• Type: Protein Powder