This site runs on reader support, useful finds, and stubborn curiosity. As an Amazon Associate, I earn from qualifying purchases.7 Best Protein Shake For Bulking | 1250-Calorie Mass Gainers

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Serious Mass delivers over 1,250 calories per two-scoop serving with 50 grams of blended protein, making it the highest calorie-per-dollar option in the mid-range tier. The protein blend combines whey concentrate, calcium caseinate, and egg white, providing both fast and slow-digesting amino acids. Over 250 grams of carbohydrates come primarily from maltodextrin, which is ideal for post-workout glycogen replenishment and sustained energy during a bulk cycle.

Users consistently report noticeable weight gain within two weeks when taking one serving daily before bed or after training. The chocolate flavor has a rich, dessert-like profile that mixes smoothly in a blender, though shaking by hand leaves some clumps. The 6-pound tub provides about eight servings, so plan accordingly — the calorie density works but the bag-to-serving ratio requires restocking more often than larger bulk containers.

The formula includes added creatine, vitamin C, and zinc for immune support, which adds value without requiring separate supplements. For anyone who struggles to surpass 3,000 calories from food alone, this shake bridges the gap efficiently. The only real drawback is the fine powder that can dust your counter during scooping.

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King Mass XL packs 60 grams of protein and over 1,000 calories per full serving, positioning it as a high-value mass gainer that competes directly with Serious Mass in calorie density. The chocolate flavor receives consistent praise for tasting like a milkshake, which makes daily consumption less of a chore. Each 6-pound bag delivers roughly 108 scoops, so a single purchase lasts over a month for most users.

Beyond the macros, the formula includes added creatine and glutamine, supporting strength output and recovery without needing extra supplements. Customer feedback shows rapid results — several users report adding 5-11 pounds of solid mass within two weeks when combining the shake with consistent training. The mixability is better than many high-calorie gainers; four scoops dissolve reasonably well in a shaker cup without turning into pudding.

The carbohydrate content sits at 180 grams per serving, making this a potent post-workout tool for those with fast metabolisms. On rest days, consider a half serving to avoid excessive calorie surplus. The flavor profile is sweet but not cloying, though anyone sensitive to artificial sweeteners should sample before committing to the full bag.

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Gold Standard Pro Gainer takes a cleaner approach to bulking by delivering 650 calories and 60 grams of protein with less than 8 grams of sugar per serving. This makes it a strong choice for lifters who want to gain lean mass without the heavy carbohydrate bloat common in mass gainers. The protein blend combines whey protein isolate and concentrate with micellar casein, offering both rapid and sustained amino acid delivery.

Users report gaining 5 pounds within the first week when drinking one or two servings daily alongside a regular diet. The vanilla custard flavor is notably rich and creamy — a standout among vanilla protein powders that often taste artificial or watery. Mixability is excellent whether shaken in a bottle or blended; the powder dissolves without clumping and has a smooth mouthfeel.

The 5.09-pound container provides 28 servings, which is more servings per package compared to the Serious Mass line. The lower calorie count means you can stack two servings without overshooting your surplus, making it easier to control fat gain during a long bulk phase. The only downside is the higher price per serving compared to bulk-oriented mass gainers.

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GNC AMP Mass XXX stands apart because of its clinically studied ingredient stack, including MyoTOR and BETAPOWER, compounds linked to increased strength and muscle endurance in as little as two weeks. Each serving delivers 780 calories, 50 grams of protein, and a proprietary blend designed to improve workout efficiency. The manufacturer claims users can achieve results with 40 percent fewer sets, which is a bold statement backed by early research.

The vanilla flavor is palatable and mixes reasonably well, though the powder is finer than average and can generate some airborne dust during scooping. Beyond the novel ingredients, the formula includes creatine, micronized amino acids, and betaine to support power output and hydration. Customers appreciate that the product is tested for over 220 banned substances, making it a safer choice for competitive athletes.

The 6-pound container yields just 13 servings, which places the cost per shake higher than other gainers. However, if the MyoTOR and betaine components genuinely improve strength gains, the higher investment may be worth it for experienced lifters hitting plateaus. Consider this option if you want a supplement that goes beyond basic calories and protein.

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CARNIVOR Mass is the world’s first beef protein mass gainer, offering a complete dairy-free alternative for lifters who cannot tolerate whey or casein. Each serving provides 50 grams of beef protein isolate, 125 grams of carbohydrates, and over 700 calories with zero fat and zero sugar. The protein isolate is 350 percent more concentrated in amino acids than steak, delivering a fast-absorbing anabolic punch without the lactose or bloat.

The chocolate peanut butter flavor receives positive feedback for tasting like chocolate milk rather than a gritty supplement. Mixability is impressive for a beef-based powder — three scoops dissolve in a standard shaker cup without the thick, pudding-like consistency that plagues many mass gainers. Customers with fast metabolisms report that it helps maintain or increase weight without excessive bloating.

The fine powder can clump if not blended properly, so a blender bottle or electric mixer is recommended. Each 6-pound tub contains 14 servings, which is average for this category. The beef isolate does have a faint savory undertone that becomes noticeable if you let the shake sit too long before drinking.

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Boost Very High Calorie is a ready-to-drink nutritional shake that provides 530 calories and 22 grams of protein per 8-ounce bottle, making it the most convenient option on this list. You open the bottle and drink — no scooping, blending, or cleanup required. This is especially useful for individuals with low appetites, medical conditions, or chaotic schedules that prevent preparing a full shake.

The chocolate flavor is well-received, with users noting it tastes better than most hospital-grade nutritional drinks. The 530-calorie density comes from a balanced blend of protein, carbohydrates, and healthy fats, plus 26 vitamins and minerals. Some customers find the texture thicker than standard protein shakes and recommend serving it over ice to improve mouthfeel.

This product is not a specialized mass gainer in the bodybuilding sense — it lacks the high protein content and creatine of powder gainers. However, for anyone who needs a reliable, no-prep source of extra calories between meals, it performs exceptionally well. The pack of 12 bottles is a solid starter pack, though heavy users may want larger quantities for consistent daily use.

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This variety pack expands on the standard Boost VHC formula by offering vanilla, strawberry, and chocolate flavors in a bulk 24-bottle box. Each 8-ounce serving delivers the same 530 calories and 22 grams of protein, but the flavor rotation prevents palate fatigue if you rely on these drinks daily. The strawberry flavor tastes like melted strawberry ice cream, while the vanilla has a creamy, custard-like profile with no artificial protein aftertaste.

Users with small appetites or medical conditions appreciate the variety because it keeps the shake routine from feeling like a chore. The drink is shelf-stable and easy to toss into a gym bag or work lunch, requiring no refrigeration until opened. The calorie and protein numbers are lower than dedicated mass gainer powders, so this works best as a supplement between meals rather than a full meal replacement.

On the downside, 24 bottles take up significant pantry space, and the cost per bottle is higher than mixing your own powder. Some users report occasional nausea if drunk too quickly on an empty stomach due to the thick consistency. If you value convenience and flavor variation over maximum protein per dollar, this pack delivers.