GNC Pro Performance Weight Gainer Supplement Powder - Double Chocolate Flavour is a high-calorie weight gain formula crafted to support increased calorie intake, muscle mass development, and workout-driven strength goals, built around Maltodextrin as the primary carbohydrate source with Whey Protein Concentrate and Skimmed Milk Powder for protein support, enhanced with Fructooligosaccharides for added nutrition and Calcium Caseinate to complement the protein blend, while Digestive Enzymes like Papain, Alpha Amylase, and Lipase help support efficient breakdown and utilization, and a balanced Vitamin Premix and Mineral Premix further support overall nutritional coverage alongside its nature-identical chocolate flavour profile.