Best High-Calorie Weight Gainers of 2025

GNC Pro Performance Bulk 1340 is a high-calorie mass gainer that provides 1,340 calories and 50g of protein per serving. It is designed to help you increase size and overall strength when used in conjunction with an exercise program. The formula includes 11g of branched chain amino acids (BCAA) and glutamine, which play important roles in protein synthesis and muscle cell hydration. This mass gainer has been tested for over 145 banned substances and is certified banned substance-free. GNC, a trusted brand since 1935, is committed to meeting the highest standards of quality, safety, and efficacy. With GNC Bulk 1340, you can support muscle energy, recovery, and growth while enjoying the convenience of a scientifically formulated mass gainer.

Muscletech Mass-Tech Extreme 2000, also known as Muscletech Mass-Tech, is a 5-in-1 hardcore mass gainer designed to help you put on extreme mass. With a whopping 80g of premium protein per serving, this mass gainer provides your body with all the necessary building blocks to build the size and muscle you desire. Whether you are looking to bulk up, pack on muscle, or break through strength plateaus, Mass-Tech Extreme 2000 has got you covered. Its powerful formula is specifically designed to help you achieve your fitness goals. With its high protein content, it supports muscle growth and recovery. Mass-Tech Extreme 2000 is the ultimate solution for individuals who want to take their muscle-building journey to the next level.

Optimum Nutrition Weight Gainer is a high-calorie protein powder designed to help you gain weight. With 1,260 calories per 2-scoop serving, it provides a significant calorie boost to support weight gain. Each serving also contains 50 grams of blended protein, which helps to build and repair muscles. Additionally, the weight gainer is packed with over 252 grams of carbohydrates per serving, providing a source of energy for your workouts. What sets this product apart is its immune support benefits, thanks to the inclusion of 22 vitamins and minerals, including Vitamin C, Vitamin D, and Zinc. These nutrients help to strengthen your immune system. Finally, the weight gainer offers versatility, as you can easily customize it by adding fruits, peanut butter, nuts, or other calorie-dense foods using an electric blender. With Optimum Nutrition Weight Gainer, you can conveniently supplement your diet and reach your weight gain goals.

Build muscle size and strength with Mutant Mass Weight Gainer Protein Powder. This enhanced gainer supplement is packed with BCAAs/EAAs and waxy maize to help with growth and bulking. With 1100 calories per serving plus 56 g of quality protein from whey isolate, concentrate and casein blend, it has 192 g of clean carbs with 12 g of fat plus naturally present 26.1 g of EAAs and 12.2 g of BCAAs. Made from natural whole-foods, it includes barley, sweet potato, rolled oats, avocado, coconut oil, flaxseed, pumpkin seed, and sunflower oil. Engineered in a state-of-the-art manufacturing facility to maintain gold-standard quality, it comes with a great gourmet taste.

The Rule One Mass Gainer is designed to help you achieve significant weight gain with its impressive 1,220 calories and over 250g of carbohydrates per serving. This formula features a 6:1 ratio of carbs to protein, making it easier for you to increase your caloric intake effectively. With 40g of protein sourced from three types of whey, it supports muscle growth and recovery. Additionally, it includes naturally-occurring BCAAs, creatine, and glutamine to enhance your workout performance. Just remember to combine it with a high-calorie diet and exercise for the best results.

Naked Mass Protein Powder is a clean and effective weight gainer designed for those looking to increase their calorie intake. With only three ingredients—Naked Whey, Naked Casein, and organic maltodextrin—it avoids artificial additives, making it a healthier choice. Each serving delivers 50g of protein and 252g of carbohydrates, providing maximum nutrition to support your weight gain goals. The combination of fast-acting whey and slow-digesting casein helps maintain protein synthesis, ensuring your body gets the amino acids it needs for recovery. Plus, the gluten-free maltodextrin offers a clean source of complex carbs, ideal for serious bulking. You can easily incorporate this versatile powder into smoothies or homemade recipes for added calories and nutrition.

Optimum Nutrition Serious Mass Weight Gainer Protein Powder is a high calorie weight gainer that is formulated to provide immune support with vitamin C, zinc, and vitamin D. Each 2-scoop serving contains 1,250 calories, 50 grams of protein, over 250 grams of carbohydrates, and 25 vitamins and minerals, as well as creatine and glutamine. The packaging may vary, but the quality of the product remains the same. For optimal results, users can add fresh or frozen fruits, peanut butter, nuts, and other calorie-dense foods using an electric blender to boost their weight gain potential.

Forzagen Mass Gainer Protein Powder is a high-quality protein supplement designed to help you gain weight and build muscle mass. With its high protein content, it provides the necessary nutrients to promote muscle growth and repair. This effective weight gainer is ideal for both men and women looking to gain weight in a healthy and balanced way. It is also calorie-rich, making it an excellent choice for those needing an extra energy boost. Simply mix this powder with your favorite beverage and enjoy a protein-packed drink that can help you reach your weight gain goals. With Forzagen Mass Gainer Protein Powder, you can easily and conveniently support your muscle-building journey.

The Sunshine Biopharma Weight Gainer is designed to enhance your workout experience. It helps shorten muscle recovery times, allowing you to get back to your training quicker. By minimizing muscle tissue breakdown, it supports your efforts to gain muscle weight while maintaining a lean physique. This product offers balanced nutrition with a high concentration of branched-chain amino acids (BCAAs), which are essential for muscle growth and repair. Additionally, it improves glycogen replenishment and nitrogen retention, ensuring your body has the resources it needs to recover and build strength effectively.

Mammoth Mass Gainer is designed to help you build muscle effectively. It provides a powerful blend of 60 grams of high-quality protein from whey isolate, concentrate, and casein, ensuring your body gets the nutrients it needs for growth. With over 1250 calories per serving, you can easily increase your daily intake to support muscle gain. This weight gainer also includes healthy carbs and essential vitamins and minerals, promoting balanced nutrition. Its versatile formula allows you to create protein shakes, smoothies, and even baked goods, making it simple to boost your calorie and nutrient intake.