Our readers keep the lights on and my morning glass full of iced black tea. As an Amazon Associate, I earn from qualifying purchases.7 Best Weight Gainer Protein Shakes | Earn 7 Lbs of Solid Mass

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Optimum Nutrition Serious Mass is the undisputed heavyweight of the weight gainer aisle, packing more than 1,250 calories per 2-scoop serving. The protein blend includes whey concentrate, calcium caseinate, and egg whites, giving you both fast and slow-digesting amino acids. With over 250 grams of carbohydrates derived largely from maltodextrin, this powder is engineered for the athlete who struggles to keep weight on despite eating like a horse. Users consistently report gaining 5+ pounds within the first two weeks when adding one shake to their daily routine.

The chocolate flavor mixes thick and creamy when used with an electric blender, though hand-shaking leaves some clumps. Each serving also delivers a healthy dose of vitamin C, zinc, and creatine, supporting both immune function and explosive strength in the gym. The 6-pound bag is large, so be prepared to store it in a container to avoid the common dust issue that some reviewers mention.

This is a premium-priced option, but the sheer calorie density and quality of the protein blend justify the spend for serious hardgainers. If your goal is rapid weight gain without constantly asking yourself “how do I eat more today?,” Serious Mass earns the top spot on this list for its proven track record over nearly two decades.

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The Gold Standard Pro Gainer is the more refined sibling of Serious Mass, offering 650 calories and a massive 60 grams of protein per serving with less than 8 grams of sugar. This makes it the ideal choice for lifters who want to lean-bulk without the insulin rollercoaster that many fiber-light gainers cause. The vanilla custard flavor is surprisingly rich and avoids the chemical aftertaste that plagues cheaper powders.

While the calorie count is lower than the “family-sized” Serious Mass, the protein density here is exceptional. The carbohydrate profile relies on maltodextrin and oat flour, providing sustained energy that complements post-workout recovery rather than a spike-and-crash dynamic. Reviewers who switched to this formula report better digestive comfort and less mid-day bloating, thanks to the inclusion of digestive enzymes in the blend.

The price point sits at the higher end of the spectrum, but you are paying for a cleaner macro split and the trusted Gold Standard quality control. For the lifter who wants to add quality muscle without accumulating unnecessary fat, this is the shake to rotate into your stack.

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The GNC AMP Mass XXX is not just another weight gainer — it is a performance stack disguised as a mass builder. At 780 calories and 50 grams of protein per serving, it includes clinically-studied ingredients like MyoTOR and BETAPOWER, which are designed to improve muscle strength and endurance with fewer training sets. User testimonials and clinical data suggest subjects saw strength improvements within two weeks of use.

The vanilla flavor is palatable, and the powder mixes relatively well in a shaker cup, though a blender yields the smoothest result. Beyond the macros, this formula is third-party tested for over 220 banned substances, making it a reliable choice for competitive athletes who need to stay within WADA guidelines.

This tub sits at a premium price point, but you are paying for the proprietary performance compounds in addition to the core protein and carbs. If your primary goal is strength gains alongside mass accumulation, this is the concentrated tool for the job. It is also a great choice for seasoned lifters who have plateaued on basic whey-and-maltodextrin blends.

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MuscleMeds CARNIVOR Mass Gainer is the unique solution for individuals who cannot tolerate dairy protein but still want a high-calorie mass builder. The protein source here is beef protein isolate, which is 350% more concentrated in amino acids than steak and contains zero fat or cholesterol. The chocolate peanut butter flavor is surprisingly smooth and does not carry the metallic taste that some beef-derived products do, though a faint savory undertone is noticeable to sensitive palates.

Each serving delivers over 700 calories, 50 grams of pure beef protein, and 125 grams of carbohydrates. Because the protein is lactose-free, users with IBS or general dairy sensitivity report far less bloating and gas compared to traditional whey-based gainers. The powder can be clumpy if not blended, but users who mix it with dairy-free milk and ice report a shake-like consistency that rivals whey alternatives.

This is a mid-range option that competes well with premium blends on protein quality. The sacrifice is the slightly lower calorie density per scoop, so you may need 4 scoops to match the energy of a 2-scoop serving of Serious Mass. If your stomach says no to dairy but your body says yes to mass, this is the obvious winner.

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The MHP UYM XXXL 1350 is a dense tool for the hardgainer who finds it nearly impossible to eat enough. Each serving packs 1,350 nutrient-dense calories, 50 grams of a fast-and-sustained release protein blend, and 11 grams of BCAAs. The cookies and cream flavor has a milkshake-level sweetness that reviewers consistently praise — it is one of the few gainers that does not taste like a chore to drink.

Beyond the sheer calorie count, this formula is designed around optimizing the insulin response to shuttle nutrients directly into muscle tissue. The inclusion of leucine and glutamine further supports protein synthesis and recovery. Users who commit to this product for 4-6 weeks report noticeable improvements in muscle fullness and strength, even on a sporadic training schedule.

This sits at a mid-range price and is an excellent option for those who want maximum calories per serving without the premium price tag of the Optimum products. The trade-off is the higher sugar content per serving compared to leaner blends, so be mindful of your total daily intake if you are sensitive to insulin spikes.

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The Nutricost Mass Gainer in double chocolate delivers 50 grams of protein per serving along with creatine monohydrate and L-glutamine, all in a 7-pound tub that undercuts most competitors on cost per gram of protein. The chocolate flavor is clean and not overly sweet, which matters when you are drinking this daily. It mixes fairly well in a shaker bottle with minimal clumps, though the powder does settle quickly if you let it sit.

This formula uses whey protein concentrate as the primary source, and the label confirms it is non-GMO and gluten-free. The facility is NSF certified and GMP compliant, so the quality assurance is on par with much pricier brands. Some users note the sweetness level is a bit high for their taste, but that is a personal preference rather than a formula flaw.

For the buyer who wants a reliable mass builder without the premium cost of the Optimum or GNC options, Nutricost delivers. The creatine and glutamine inclusions are a bonus that usually comes in higher-tier products, making this the smartest value proposition on the list for budget-conscious lifters.

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The NutraBio CarboMax is not a standalone mass gainer — it is a pure carbohydrate powder designed to be stacked with your existing protein shake or meals. Made of 100% maltodextrin with zero sugar, zero protein, and zero fat, it serves as a calorie booster that you can tailor to your own macro needs. The unflavored nature means it dissolves into any liquid without affecting taste, which makes it incredibly versatile for smoothies, oatmeal, or even post-workout recovery drinks.

Each 5-pound tub provides 75 servings, and each serving delivers a clean energy source that supports sustained endurance without the stomach heaviness of a full mass gainer. Users who are already hitting their protein targets but fall short on carbs find this an efficient way to close the calorie gap without drinking a thick shake.

This is the entry-level budget option for those who prefer to build their own custom mass shake. It is not a complete solution, but if you already own a high-quality protein powder and just need the extra carbs, CarboMax is the leanest and most affordable way to get there. Pair it with a scoop of Nutricost Mass Gainer for a cost-effective high-calorie stack.