10 Best Supplements For Weight Gain And Muscle Gain in 2026

With 1,280 calories and 52 grams of protein per serving, this gainer is built for a single, demanding purpose: adding serious mass. It pairs a hefty dose of fast-digesting whey with slow-release casein, aiming to fuel muscles immediately and then over several hours. The addition of a gram of creatine and a vitamin and mineral blend rounds out a formula designed for the individual whose primary barrier to growth is simply getting enough calories and nutrients in. It’s a straightforward, calorie-dense engine for weight gain.

The trade-off is in the serving size and count. That massive calorie load comes with 245 grams of carbohydrates, which can be a lot to handle in one sitting. For someone who needs a slightly less carb-forward option or more servings per tub, the Optimum Nutrition Pro Gainer provides a different macro profile and a larger total package.

A single serving delivers 1,250 calories, which is a definitive tool for anyone struggling to hit a substantial daily calorie surplus through food alone. This product suits individuals in a dedicated bulking phase who need a dense, all-in-one shake to consistently support weight and muscle gain, backed by a 50-gram protein hit and a full spectrum of vitamins.

Each two-scoop serving delivers over 1,200 calories, which is designed for dedicated bulking phases when regular meals alone cannot meet extreme energy needs. This makes it overkill for someone just seeking a post-workout protein bump. Among Optimum Nutrition’s own line, the Pro Gainer offers 60 grams of protein per serving, but Serious Mass focuses on maximum caloric intake for its specific purpose.

With only three ingredients and no artificial additives, NAKED Mass offers a straightforward option for buyers focused on label transparency. Each 1,250-calorie serving delivers protein from whey and casein alongside organic tapioca maltodextrin, providing a known ingredient list. This formulation is intended for those who prefer a simple, unflavored base to which they can add their own flavors and ingredients.

Such a clean, high-calorie load comes in an unflavored form, so you’ll be responsible for making it taste good. Compared to a product like Optimum Nutrition Serious Mass, which arrives ready-mixed with flavors and additional supplements like creatine, NAKED Mass provides a blank, premium canvas. You gain purity but lose convenience, making it a specialist tool rather than an all-in-one solution.

At 56 grams of protein from a blend of whey and casein, this gainer is built for sustained muscle support throughout the day, not just a post-workout spike. It suits someone struggling to hit a high daily calorie and protein target through whole foods alone, offering a dense, convenient solution. The inclusion of whole-food ingredients like rolled oats and sweet potato is a thoughtful touch for a product in this category.

Mutant Mass Extreme Gainer provides 1,100 calories per serving, a substantial energy intake for weight gain goals. Its formula includes a blend of whey isolate, whey concentrate, and casein to supply 56 grams of protein. The product also incorporates whole-food ingredients like barley, sweet potato, and rolled oats.

The decisive fact here is the 1,500-calorie serving when mixed with milk, a caloric load designed for one thing: pushing through a hard-gainer plateau. It suits someone whose primary obstacle is simply eating enough, and it bundles in a clinically backed dose of creatine monohydrate to support the strength gains needed to put those calories to work. This is for the individual tracking macros and workouts meticulously but still struggling to move the scale, where convenience and density trump everything else.

Each six-scoop serving delivers 304 grams of carbohydrates, a substantial amount that requires a significant digestive commitment. When mixed with skim milk, it provides 1,500 calories and 60 grams of protein, making it a high-volume option for those prioritizing maximum calorie intake per shake. The formula includes HPLC-tested creatine monohydrate and branched-chain amino acids, positioning it as an engineered, all-in-one nutritional supplement.

A 60-gram protein hit per serving makes this a serious tool for muscle repair and growth, squarely aimed at those whose primary goal is packing on lean mass. The 650-calorie foundation provides the necessary surplus for weight gain, while the carbohydrate load helps refuel depleted glycogen stores. It suits someone with a demanding training regimen who needs a dense, protein-forward nutritional anchor.

You must consider the sheer volume you’re committing to, both in the 10.2-pound container and in each substantial serving. If your aim is sheer caloric density above all else, the Dymatize Super Mass Gainer offers over double the calories per serving. This Optimum Nutrition option, however, prioritizes a cleaner protein-to-calorie ratio for those focusing on muscle quality alongside size.

With 1200 calories per serving, this is BSN’s most calorie-dense mass gainer, built for pushing past plateaus when whole food intake simply can’t keep up. The 10 grams of fiber per serving is its standout feature, a practical inclusion that can help manage the digestive load of such a high-calorie regimen. This product suits someone in an extreme training phase who needs maximum caloric fuel and appreciates the digestive support that fiber provides.

BSN True-Mass prioritizes high-calorie volume with a 4:1 carbohydrate-to-protein ratio, a formula designed for significant mass addition rather than lean-focused gains. Its 10 grams of fiber per serving is a notable inclusion for digestive support, which can be a concern with such a calorie-dense product. This combination makes it a specific tool for hard-gainers whose primary goal is increasing overall body weight.

With only 6 grams of fat per serving, this mass gainer stands out for anyone prioritizing lean gains and a cleaner macronutrient split. It delivers a hefty 53 grams of protein from a straightforward whey and casein blend, which supports sustained muscle recovery. The formula is packed with complex carbs and fiber to fuel hard training. Its fully disclosed ingredients list and third-party testing also offer a level of transparency that appeals to skeptical buyers who read labels.

You should be prepared for the sheer volume of the shake, which at 99 grams of carbs can feel like a meal replacement. This makes it a dedicated tool for a hardgainer’s calorie surplus, not a casual snack. Compared to something like the Dymatize Super Mass Gainer, which packs more calories and carbs into a denser formula, the NutraBio option is the disciplined choice for those who want the mass without the extra fat.

With 650 calories in the recommended four-scoop serving, this gainer provides a substantial energy surplus for adding mass, yet avoids the extreme bulk of some high-calorie shakes. Its 32 grams of protein, including 3 grams of leucine from milk proteins, supports muscle repair. This positions it as a straightforward option for supplementing a diet rather than replacing whole meals, fitting between standard protein powders and heavier-duty mass builders.

Be aware of the serving size and count. Each shake requires four scoops, which depletes the five-pound container in about two weeks of daily use. Compared to a product like Optimum Nutrition Serious Mass, which packs over twice the calories per serving, this is a more moderate approach to weight gain. It’s for incremental progress, not a caloric bulldozer.

The 530 calories and 22 grams of protein in each 8-ounce bottle make BOOST a uniquely convenient tool for consistent calorie intake. You don’t need a blender or a shaker bottle; you just need a fridge and a few seconds. This is the pick for someone whose primary barrier to weight gain is simply the effort and time of preparing large, calorie-dense shakes multiple times a day. It suits a routine where grabbing a chilled drink post-workout or between meetings is the only reliable way to hit a surplus.

This drink provides 530 calories in a ready-to-consume 8-ounce bottle, which simplifies weight gain by eliminating any mixing or preparation. While convenient, its caloric content is lower per serving than many dedicated mass gainer powders, so reaching the highest calorie targets would require consuming multiple bottles. It represents a premium convenience for those prioritizing ease over maximum caloric density per purchase.