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 Protein Powder For Mass Gain | 1,290 Calorie Vegan Gainer

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NAKED Vegan Mass uses a 2:1 pea-to-rice protein ratio that delivers a complete amino acid profile without relying on soy or dairy. Each serving lands at 1,290 calories from organic tapioca maltodextrin, peanut flour, and coconut sugar — avoiding the corn and wheat fillers that cause inflammation in sensitive lifters. The chocolate peanut butter flavor tastes legitimately good, and the powder mills fine enough to blend smoothly into oatmeal for a caloric boost that does not taste like sawdust.

The label shows 50 grams of protein per 11-serving container, making this a premium choice for plant-based athletes who want a clean surplus without artificial sweeteners or colorings. User feedback highlights consistent mixability with a blender and a non-chalky finish — multiple users mention buying over 100 containers. The 8-pound bag reduces cost per serving slightly compared to smaller craft-plant powders, though it still sits above budget whey blends.

Where this powder earns its edge is the ingredient deck: zero artificial flavors, GMO-free, soy-free, and gluten-free. The tradeoff is a higher price per pound than whey-based mass gainers and a 3-scoop half-serving recommendation some users adopt to stretch the tub. For lifters managing dairy intolerance or who prefer whole-food ingredient sourcing, this is the cleanest high-calorie plant mass gainer available.

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GNC AMP Mass XXX differentiates itself with MyoTOR, a patented blend of conjugated linoleic acid and phosphatidic acid clinically shown to accelerate strength improvements within two weeks of training. Each 780-calorie serving delivers 50 grams of protein from a whey blend, alongside creatine monohydrate and BETAPOWER (betaine) to support muscular endurance during high-volume blocks. The vanilla flavor mixes clean with milk or water and carries none of the medicine-like aftertaste that plagues performance formulas.

The clinical backing matters for athletes who want more than just a surplus. The WADA-banned substance testing adds trust for competitive lifters — LGC skip-lot screening covers over 220 prohibited substances. Users report effective weight gain without the sticky sweetness that makes budget mass gainers hard to drink. A 13-serving tub limits the shelf-life, but the performance-oriented ingredient stack justifies the shorter run for lifters cycling serious strength phases.

The main tradeoff is calorie density: at 780 calories per serving, this sits in the moderate range compared to 1,200+ calorie monsters. Lifters needing extreme surpluses will need to double scoop or add calorie-dense mix-ins. The higher cost per serving reflects the clinical research and added creatine/ betaine — a worthwhile investment for lifters who want proof their gainer works beyond just filling a shaker.

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The MuscleMeds Carnivor Mass Big Steer 1250 packs 1,250 calories and 50 grams of hydrolyzed beef protein isolate into a massive 15-pound container. Beef protein isolate delivers a complete amino acid profile without lactose, casein, or whey — critical for lifters whose digestive systems revolt against dairy-based mass gainers. The formula is fat-free, sugar-free, and includes chromium and 4-hydroxyisoleucine for insulin and carb control, a unique approach for a high-calorie gainer.

Users with severe lactose intolerance report zero protein gas or stomach discomfort, making this a standout choice for dairy-sensitive athletes who need heavy calorie loads. The chocolate flavor mixes best with 24 ounces of water in an oversized shaker to avoid clumping; users who take this shortcut report a grittier texture. The 20 full servings per tub offer a strong price-per-serving ratio for the beef-isolate category.

The tradeoff is the 15-pound container size — it is bulky and awkward to store, and the powder requires vigorous shaking or a blender to reach full dissolution. Some users note a faint beef undertone if mixed with water alone, though peanut butter or banana additions mask it completely. For lifters who can handle the mixing effort, this is the highest-value lactose-free mass gainer on the market.

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Optimum Nutrition Gold Standard Pro Gainer delivers 650 calories and 60 grams of protein per serving, a macro split that leans heavily toward protein density rather than pure calorie padding. The vanilla custard flavor is widely praised as rich and creamy — users consistently report this is the easiest mass gainer to drink without gagging. The 5.09-pound container yields 14 servings, and the blend uses whey protein isolate as the primary source, ensuring a high biological value per gram.

The lower sugar content (less than 8 grams per serving) makes this a smarter choice for lifters who want to add lean mass without excessive insulin spikes. Users report gaining 5 pounds in a week when combining two shakes daily with targeted training — not sheer water weight but visible progress. The powder dissolves easily in a shaker cup without caking, though the vanilla custard note may be too sweet for some palates accustomed to neutral flavors.

At 650 calories, this is not the best fit for extreme hard-gainers who need 1,000+ calories in a single shake. It excels as a daily surplus builder for lifters who prefer a moderate, controlled calorie increase rather than a massive caloric bomb. The Gold Standard brand trust and consistently clean mixability make it the default mid-range pick for lifters who want reliable macros without mystery fillers.

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Optimum Nutrition Serious Mass has anchored the mass-gainer aisle for nearly two decades, and the spec sheet explains why: 1,250 calories, 50 grams of blended protein (whey, casein, egg), and over 250 grams of carbohydrates per two-scoop serving. The chocolate flavor delivers a dessert-like taste that stands up to heavy mix-ins like peanut butter or bananas without losing its profile. The protein blend provides both fast-digesting whey and slow-digesting casein, extending the anabolic window across several hours.

Users with high-velocity metabolisms report gaining 5 pounds in two weeks with a single daily shake, crediting the combination of caloric density and added creatine for visible muscle fullness. The formula includes vitamin C and zinc for immune support — a practical addition for hard-training lifters whose recovery demands exceed normal dietary intake. The fine powder requires a blender to avoid lumps; hand-shaking produces a gritty drink with floaters.

The main drawbacks are the high sugar content (roughly 20g per serving from maltodextrin) and the massive bag size that challenges small kitchens. Some users note the chocolate flavor borders on overly sweet, and the 16-serving count feels brief for the container footprint. Despite these rough edges, Serious Mass remains the top-selling mass gainer for a reason — it delivers predictable, repeatable weight gain for lifters who need a guaranteed caloric surplus.

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Nutricost Mass Gainer brings a clean ingredient deck — whey protein concentrate, creatine monohydrate, and L-glutamine — to the budget-friendly mass gainer category. Each 7-pound container provides 9 servings of 50 grams of protein, and the chocolate flavor tests well against pricier competitors. The powder is manufactured in an NSF-certified, GMP-compliant facility, adding a layer of quality assurance that budget gainers often skip.

Users highlight the straightforward taste and smooth mixability as standout advantages over other economy gainers that often clump or taste artificial. The inclusion of creatine adds value for lifters who would otherwise buy a separate supplement; L-glutamine supports recovery in the same single-scoop package. Some users with sweet sensitivity find the flavor too sweet — splitting the serving across two smaller drinks eases this and aids digestion.

The main limitation is the serving count: at 9 servings per tub, heavy lifters chasing a daily surplus will burn through this quickly. The whey concentrate base may cause mild bloat in lactose-sensitive users, though the glutamine content partially offsets gut inflammation. For entry-level buyers or those on a tight supplement budget, this is the best cost-per-gram value in the mass gainer aisle.

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MuscleMeds CARNIVOR Mass uses hydrolyzed beef protein isolate as its sole protein source, delivering 700 calories and 50 grams of protein per serving with zero fat and zero sugar. The chocolate peanut butter flavor earns high marks for tasting like chocolate milk rather than a chalky supplement — a notable achievement for a dairy-free, lactose-free, and halal-certified powder. The beef isolate is hydrolyzed for faster amino acid absorption, and the formula includes added BCAAs for extra anabolic drive.

Lactose-intolerant users consistently report no gas, no bloating, and no protein-induced digestion issues, making this a superior alternative to whey blends for gut-sensitive lifters. The powder mixes thinner than whey-based gainers — a consistent texture that users describe as easy to drink without that thick, pudding-like sensation. Some users note a faint beef smell when mixing with water, but the chocolate peanut butter flavor profile masks it well when combined with milk or a banana.

The downside is the moderate calorie count: at 700 calories, hyper-metabolic lifters needing 1,000+ per shake will need to double the serving or add caloric mix-ins. The fine powder can become sticky and clumpy if not stirred immediately with a blender. For dairy-avoidant athletes who prioritize clean ingredients and minimal digestive load, CARNIVOR Mass is the best mid-range pick for lactose-free mass gain purposes.