The World’s #1 Whey Protein Powder. Mass gainer protein powder is a calorie-dense supplement designed to help you gain healthy weight and build muscle mass. Each serving delivers a powerful blend of high-quality protein—often from whey or casein—and complex carbohydrates in a balanced ratio, typically providing 700–1,260 calories, 40–50g of protein, and over 100g of carbohydrates. Many formulas also include healthy fats, dietary fiber, vitamins, minerals, and added ingredients like creatine and MCTs to support muscle growth, recovery, and overall performance. Mass gainers are ideal for individuals with fast metabolisms, athletes, or anyone who struggles to consume enough calories through regular meals. The high protein content supports muscle repair and growth, while the carbohydrates replenish energy stores and fuel intense workouts. Easy to mix and available in a variety of flavors, mass gainer protein powder is a convenient way to meet your daily calorie and nutrient needs for effective bulking With its light texture and clean taste, whey isolate mixes effortlessly into shakes and smoothies for a convenient, low-calorie protein boost. It’s perfect for athletes, bodybuilders, and anyone with lactose sensitivity who wants a clean, fast-absorbing protein source.