8 Best Protein Powders to Increase Weight (2026 Guide)

If you’re a hard gainer drowning in small meals and endless salads, the Dymatize Super Mass Gainer in Fruity Pebbles flavor is a game-changer. With a staggering 1,290 calories and 248g of carbs per serving, this isn’t just a protein powder—it’s a full-blown calorie rocket designed to obliterate energy deficits. The 52g protein blend combines fast- and slow-digesting sources to keep muscles fed for hours, while the 10.7g of BCAAs, including a hefty 5.1g of leucine, directly fuel muscle protein synthesis—exactly what you need when trying to pack on lean mass.

In real-world use, this mass gainer delivers on its promise: mix one serving with milk, and you’ve essentially consumed a full meal in a glass. It mixes smoothly with minimal clumping, and the Fruity Pebbles flavor tastes like dessert, not chalk. It’s ideal for post-workout recovery or as a nighttime calorie boost, but be mindful—this isn’t for casual use. The sheer carb load can cause bloating if your gut isn’t accustomed to high-volume feeding, and the sugar content, while not extreme, adds up if you’re stacking multiple servings.

Compared to other gainers, Dymatize leans into extreme caloric density, making it perfect for athletes with sky-high TDEEs or those struggling to eat enough. It’s more indulgent than NAKED Mass and far more calorie-packed than RIVAL NUTRITION’s Clean Gainer, but it sacrifices some clean-label appeal. If your goal is maximum weight gain with minimal effort, and you value taste and convenience, this is a top-tier option—even if you’re trading a bit of nutritional purity for performance.

For those aiming to increase weight moderately without excess fat, Premier Protein 30g High Protein Powder strikes a rare balance between clean nutrition and indulgent taste. Each serving delivers 30g of 100% whey protein—a complete amino acid profile to support muscle growth—while packing only 150 calories, 1g of sugar, and 3g of carbs. This makes it ideal for lean bulking phases or for individuals who want to add protein without spiking their calorie intake dramatically.

In testing, the vanilla flavor blends seamlessly with water, almond milk, or in recipes like protein pancakes and muffins. It has a creamy, dessert-like texture reminiscent of vanilla ice cream, making it easy to consume daily. However, its low-calorie profile means you’ll need to pair it with other calorie-dense foods—like peanut butter, oats, or whole milk—to truly gain weight. On its own, it’s more of a support player than a primary mass-building tool.

Compared to Optimum Nutrition Serious Mass, it’s dramatically lighter in calories and carbs, but that’s by design. It’s better suited for intermittent use—post-workout recovery, meal supplementation, or curbing hunger—than as a dedicated weight gainer. If you’re looking for clean, high-protein support with versatility, and you’re not a hard gainer, this is a smart, sustainable choice that won’t sabotage your macros.

When muscle recovery and sustained protein delivery are your top priorities, Muscle Milk Pro Series stands out with a 50g slow- and fast-release protein blend that keeps amino acid levels elevated for hours. This isn’t just about calories—it’s about maximizing muscle repair after intense training, thanks to a high-quality dual-phase protein matrix and 20 essential vitamins and minerals. The 3g of sugar and low-fat profile make it ideal for those adding mass without unnecessary junk.

In real-world testing, the Knockout Chocolate flavor mixes well with water and has a rich, milkshake-like consistency—especially when used with a shaker. It digests smoothly without bloating, and the NSF Certified for Sport label gives it credibility for athletes concerned about banned substances. However, at just 2 pounds and 11 servings, the tub runs out fast, and the lack of high carbs means it won’t drive weight gain on its own—you’ll need to stack it with other calorie sources.

Compared to Dymatize Super Mass Gainer, it’s far less caloric but more focused on lean muscle retention and recovery. It’s a better fit for serious lifters who train hard and want clean, reliable protein—not sugar-laden bulk. If your goal is quality muscle growth over sheer size, and you value third-party testing and formulation science, this delivers elite recovery support in a compact package.

Tailored for women who want more than just protein, Forzagen All in One Protein for Her blends 20g of whey and collagen peptides into a formula that supports muscle recovery, joint health, skin elasticity, and gut wellness—a holistic approach often missing in standard gainers. The Thermogenic Complex with green tea and grape seed extract helps manage cravings and boost metabolism, making it ideal for women aiming to gain weight strategically, not excessively.

In practice, the Dutch Chocolate flavor is rich and satisfying, dissolves easily, and works well as a meal replacement or pre-workout fuel. The digestive support formula minimizes bloating—a common complaint with protein powders—thanks to added enzymes and gut-friendly ingredients. However, with only 20g of protein and moderate calories, it’s not designed for rapid mass gain. You’ll need to supplement with other foods to hit high-calorie targets.

Compared to Optimum Nutrition Serious Mass, it’s far less aggressive in caloric load but offers unique benefits for women’s health. It’s not a traditional gainer, but rather a wellness-forward protein for those prioritizing beauty, digestion, and sustainable weight gain. If you’re looking to build a stronger, healthier frame from the inside out, this is a standout option that outperforms generic powders in functional nutrition.

When it comes to all-around mass-building power, Optimum Nutrition Serious Mass earns its title as the best overall weight gainer. With over 1,200 calories, 50g of protein, and 250g of carbs per serving, it’s engineered to push even the most stubborn hard gainers into a caloric surplus. The premium protein blend supports muscle repair, while the vitamin and mineral mix helps maintain immune function during aggressive bulking phases.

In real-world use, it mixes well with milk and can be further customized with peanut butter, bananas, or oats to skyrocket calorie intake. The chocolate flavor is rich but not overly sweet, and the powder dissolves reasonably well with blending. That said, the sheer volume can be daunting—some users report digestive discomfort if consumed too quickly or on an empty stomach. It’s best sipped slowly post-workout or as a standalone meal.

Compared to Dymatize Super Mass Gainer, it offers similar caloric density but with a cleaner, more balanced macro profile and better brand reputation for quality control. It’s more versatile than NAKED Mass and more widely available than niche options. If you want a reliable, high-performance mass gainer that’s been trusted for years, this is the gold standard—delivering unmatched value in size, taste, and effectiveness.

For those seeking lean gains with minimal fat and sugar, Dymatize ISO100 is a gold-standard whey isolate that delivers 25g of ultra-pure protein in under 120 calories. While it’s not designed for rapid weight gain, it excels as a clean, fast-absorbing protein source to support muscle growth without excess baggage. The isolate filtration process removes lactose, fat, and carbs, making it ideal for sensitive stomachs and those on controlled diets.

In testing, the Gourmet Vanilla flavor blends smoothly with water or milk and has a clean, sweet taste without artificial aftertaste. It’s perfect for post-workout recovery or as a low-calorie meal supplement when you need protein without bloat. However, with only 1g of carbs and 1g of fat, it won’t contribute meaningfully to weight gain unless paired with other calorie sources. It’s more of a precision tool than a bulk builder.

Compared to Premier Protein, it offers similar purity but with better taste and faster absorption. Against mass gainers like Serious Mass, it’s on the opposite end of the spectrum—minimalist, not maximalist. If your goal is lean muscle retention, clean protein intake, and digestive comfort, this is a top-tier choice—just don’t expect it to pack on pounds by itself.

If you want lean, clean gains without artificial junk, RIVAL NUTRITION Clean Gainer is a mid-calorie powerhouse that delivers 550 calories and 30g of protein per serving from a smart blend of whey, milk, and micellar casein. What sets it apart is its natural formulation—sweetened with stevia, free of artificial colors, and made with real food-derived carbs like quinoa, blueberry, and oat fiber. This isn’t empty calories; it’s functional fuel for sustained energy and recovery.

In real-world use, it mixes easily and has a mild, pleasant vanilla taste that doesn’t overwhelm. The 97g of complex carbs help replenish glycogen after intense workouts, and the 2g of added sugar keeps insulin spikes in check. It’s ideal for athletes who want to gain weight gradually and healthily, without the bloating or sugar crash of traditional gainers. However, at 550 calories, it may not be enough for extreme hard gainers needing 1,000+ calories per shake.

Compared to Optimum Nutrition Serious Mass, it’s less caloric but cleaner and more nutrient-dense. Against NAKED Mass, it offers better taste and mixability while maintaining a clean label. If you’re looking for a balanced, sustainable gainer that supports lean mass, digestion, and performance, this is a top contender—especially for those who care about what’s not in their supplement.

For purists who demand maximum calories with zero artificial ingredients, NAKED Mass is the cleanest mass gainer on the market. With 1,250 calories, 50g of protein, and 252g of carbs per serving, it’s built for serious size, but what’s not in it matters just as much: only three ingredients—whey, casein, and organic tapioca maltodextrin. No artificial flavors, sweeteners, or fillers. It’s NSF Certified, soy-free, gluten-free, and GMO-free—making it ideal for those with dietary sensitivities or strict clean-eating protocols.

In practice, the unflavored version mixes well but has a slightly chalky mouthfeel—best blended with strong flavors like cocoa, banana, or peanut butter. The grass-fed whey and micellar casein provide both fast and slow digestion, keeping muscles in an anabolic state for hours. However, the lack of flavor options and digestive intensity can be a hurdle—some users report bloating due to the high maltodextrin load. It’s not for beginners.

Compared to Dymatize Super Mass Gainer, it’s cleaner but less palatable; against Optimum Nutrition Serious Mass, it’s more transparent but harder to enjoy. If your priority is ingredient purity, high-calorie density, and natural sourcing, and you’re willing to sacrifice taste for quality, this is the ultimate clean bulking tool—a no-compromise choice for elite-level gainers.