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 Shakes For Weight Gain | Stop Wasting Money on Thin Shakes

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The Pro Gainer delivers 650 calories per serving with a respectable 60 grams of protein and a remarkably low sugar count of less than 8 grams — a combination that is difficult to find in mainstream weight gainers. The protein blend draws from whey, casein, and egg, providing both fast and slow-digesting fractions that support muscle protein synthesis for hours after your shake. The Vanilla Custard flavor is rich and creamy, tasting noticeably better than the chalky vanilla profiles that plague many budget gainers.

Each serving contains over 80 grams of carbohydrates, sourced primarily from a maltodextrin-based matrix that provides rapid glycogen replenishment for post-workout windows. The powder mixes cleanly in a shaker cup with about 12 ounces of water or milk, forming a smooth consistency without clumps. Users consistently report real scale movement — several reviews note gaining 5 pounds within the first week of daily use — making this a reliable tool for those struggling to eat enough solid food.

At 5.09 pounds, the container yields roughly 14 full servings, so heavy users pounding two shakes a day will burn through it in about a week. The discontinued manufacturer tag on the listing creates some confusion, but current stock remains fresh and the formula has not changed. If you want a high-protein, low-sugar mass gainer that actually tastes good, this is the tub to start with.

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Animal Meal takes a fundamentally different approach to the weight-gain category — instead of building a shake around cheap maltodextrin and whey concentrate, it uses real-food carbohydrate sources like sweet potato powder and rolled oats, paired with a protein blend derived from pea protein isolate, instant egg white, whole egg protein, and beef protein isolate. The result is 500 calories per two-scoop serving with 46 grams of complete protein and zero dairy, making it one of the most digestible options available for lactose-sensitive athletes.

The flavor profile accurately reflects its ingredient deck — you can taste the oats and egg whites, which tastes clean and natural rather than artificially sweet. The Chocolate version is the preferred flavor; the Vanilla has a noticeably more pronounced egg-white taste that some find off-putting. The powder blends easily in a shaker bottle, though it leaves a slight residual grit from the oat particles that signals the absence of refined fillers.

Longtime users report improved energy throughout the day and less bloating compared to whey-heavy mass gainers. The biggest drawback is the container economics — at 5 pounds with 20 servings, heavy users going through two shakes daily will need to restock every 10 days, pushing the cost to roughly five dollars per day. If you prioritize ingredient transparency and digestive comfort over raw calorie volume, Animal Meal is the cleanest mass builder on this list.

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CARNIVOR Mass is built around beef protein isolate, a rare protein source in the mass-gainer aisle that provides a complete amino acid profile without the lactose or casein that triggers digestive distress in many users. Each serving packs 700 calories, 50 grams of protein, and 125 grams of carbohydrates with zero fat and zero sugar — a macronutrient profile designed for hard gainers who need massive calorie density without liquid volume. The powder mixes thinner than most mass gainers; you can fit three scoops in a standard shaker cup without it turning into sludge.

The Chocolate Peanut Butter flavor manages to mask the faint beef-derived taste that some users notice, especially if the shake sits for a few minutes after mixing. The brand recommends blending rather than shaking, because the fine powder can become sticky and form clumps if not agitated thoroughly. Users with fast metabolisms report that this shake helps maintain their weight when added to a normal eating routine, and several note that the high carb count effectively refuels after heavy training sessions without causing the sugar crash typical of cheap gainers.

At 6 pounds, the tub provides a generous number of servings per container, making the cost per gram of protein more efficient than whole-food meal replacements. The sheer carbohydrate load — 125 grams per serving — makes this best suited for serious athletes or those who need extreme calorie surplus. Casual users who mix this without a rigorous workout routine may find the carb density excessive for their goals.

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This is not a mass gainer in the traditional sense — each scoop delivers 120 calories and 24 grams of protein with only 1 gram of sugar and 1.5 grams of fat, making it a building block for lean muscle rather than a calorie bomb. Gold Standard Whey uses whey protein isolate as its primary ingredient, which means the carbs and fats have been largely filtered out, leaving a clean protein source that is ideal for layering into a weight-gain plan. Mix a couple of scoops with whole milk, peanut butter, and a banana, and you can easily build a 600–700 calorie shake with a complete amino acid profile.

The mixability sets the standard for the entire category — the powder dissolves completely in cold water with a spoon or shaker, leaving zero clumps and producing a smooth, milk-like texture. Double Rich Chocolate is the most popular flavor, though some users find it slightly artificial compared to the Extreme Milk Chocolate variant. The 1.98-pound tub is a practical size for testing the flavor before committing to the larger 5-pound container.

Because this is a pure whey protein rather than a complete mass gainer, it is not the most efficient option if you want a drink-and-go solution. You will need to add your own calorie sources to push the numbers into weight-gain territory. However, for athletes who already eat solid food but need a clean protein supplement to optimize recovery and muscle synthesis, this remains the gold standard after two decades on the market.

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BOOST Very High Calorie is a ready-to-drink shake that packs 530 calories into a compact 8-ounce bottle — the highest calorie density per ounce on this list. This makes it an exceptional tool for individuals with suppressed appetite, illness-related weight loss, or nausea, because you can consume meaningful nutrition in just a few gulps. Each bottle delivers 22 grams of protein along with 26 vitamins and minerals, functioning as a full nutritional supplement rather than just a protein drink.

The variety pack includes four bottles each of Vanilla, Chocolate, and Strawberry, which prevents flavor fatigue during daily use. The texture is noticeably thicker than standard nutritional shakes, which users report helps signal fullness despite the small volume. Some reviewers recommend chilling the bottles or pouring them over ice to reduce the viscosity if the thickness bothers you. The Chocolate flavor is the most consistently praised; the Vanilla has a mild aftertaste that some describe as slightly medicinal.

Unlike powder mass gainers, there is no mixing, measuring, or cleanup — just twist and drink. The trade-off is a higher price per calorie compared to powders, and the sugar content is moderate rather than low. This is the clear winner for medical scenarios, seniors, or anyone who physically cannot eat enough to maintain their weight, but it is not the most economical option for a healthy athlete looking to bulk.

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This is the exact same BOOST Very High Calorie formula as the variety pack above, but in an all-Chocolate 12-pack for those who know exactly what flavor they prefer. The nutritional stats are identical — 530 calories, 22 grams of protein, and 26 vitamins and minerals per 8-ounce bottle — making this the most calorie-dense ready-to-drink option available without a prescription. The Chocolate flavor has a genuine cocoa taste that does not lean into the artificial candy-bar territory common to many medical nutrition shakes.

The thicker texture is a defining feature of the Very High Calorie line, and it is worth noting for anyone with swallowing difficulties. Several users caring for cancer patients specifically noted that the thickness can be a challenge for individuals with dysphagia, and the official recommendation to sip slowly over ice is not just marketing — it genuinely improves the drinking experience. The shake works reliably as a mini-meal replacement when solid food feels impossible.

If you enjoy the Chocolate flavor and plan to use these daily, buying the single-flavor case is slightly more efficient than the variety pack simply because you are not paying for flavors you may not finish. The biggest limitation is the lack of flavor rotation, which could lead to taste fatigue over extended use. For medical or low-appetite scenarios where the priority is simply getting calories in, this single-flavor case gets the job done without decision fatigue.

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KATE FARMS Organic 1.4 is the only USDA Certified Organic shake on this list, and the ingredient philosophy is entirely different from the standard medical-nutrition aisle. Each 11-ounce bottle delivers 455 calories and 20 grams of plant-based protein (pea and rice protein isolate), with no artificial flavors, sweeteners, or common allergens like dairy, soy, or gluten. The formula also includes phytonutrient extracts from organic broccoli, green tea, turmeric, and acai — ingredients that support cellular health beyond basic macronutrient provision.

The Vanilla flavor works well on its own, though many users recommend blending it with fruit or peanut butter to improve the taste profile. The Chocolate flavor is generally preferred for standalone drinking. The texture is smooth and less viscous than the BOOST VHC line, which makes it a better fit for those with sensitive digestive systems or texture aversions. Users with acid reflux and age-related appetite loss report gaining weight back without the bloating or discomfort they experienced with dairy-based shakes.

The primary barrier here is the cost — this is the most expensive option on a per-calorie basis, and the 6-pack format does not offer the economy of scale that powder gainers provide. Additionally, the calorie count of 455 per serving is lower than other mass-building options, so hard gainers may need to drink two bottles per session to get into surplus territory. For anyone with multiple food allergies, a commitment to organic sourcing, or a digestive system that rejects whey and soy, this is the safest and cleanest choice available.