The Best Mass Gainer Protein Powders of 2026

What Is a Mass Gainer Protein Powder?

Most protein powders are built around one goal: deliver protein efficiently with as little else as possible. Mass gainers work from the opposite premise. They are engineered to pack a significant calorie load into a single serving, combining protein, carbohydrates, and fat in proportions designed to push your daily intake well above maintenance. Depending on the product, a single serving can deliver anywhere from 400 to more than 2,000 calories.

The thing that separates a mass gainer from a standard protein powder is not the protein itself but what surrounds it. Carbohydrates typically account for 50 to 85 percent of the calories in most mass gainers, which is what drives the numbers up. The protein content in grams often looks similar to a regular protein powder, but its contribution to total calories is proportionally much smaller once you factor in the carbohydrate load.

Who actually needs one of these? Hardgainers, meaning people with fast metabolisms or high daily energy expenditure who genuinely struggle to eat enough food to support muscle growth. Strength athletes in deliberate bulking phases. Anyone in a high-volume training period with elevated caloric demands. And people who simply cannot hit their calorie targets through whole food alone no matter how much they try.

One thing worth addressing directly: mass gainers do not automatically cause fat gain. What determines whether added calories go toward muscle or fat is total caloric balance and training stimulus, not the supplement itself. Used deliberately within a structured training and nutrition plan, a mass gainer can support lean muscle accrual. Used carelessly, the same product adds fat. The quality of the carbohydrate source also matters more than most buyers realize. Products built around whole-food sources like oats, sweet potato, and quinoa provide more sustained energy and better digestive tolerance than those relying entirely on maltodextrin.

How We Ranked the Best Mass Gainer Protein Powders

More than 35 products were evaluated using a weighted scoring model across eight criteria.

Calorie density and macro profile (25%): Total calories per serving, protein-to-carbohydrate ratio, sugar content, and fat quality. More balanced macro profiles and lower added sugar scored higher.

Protein quality (20%): Isolate, concentrate, or blend; sourcing transparency; amino acid profile; and indicators of amino spiking.

Carbohydrate source quality (15%): Products using whole-food carb sources like oat powder, sweet potato, quinoa, and rice scored higher than those relying primarily on maltodextrin.

Ingredient transparency and additives (10%): Clearly disclosed ingredient lists, no artificial dyes, minimal fillers, and clean sweetener choices.

Third-party testing and heavy metal screening (10%): Independent lab testing, publicly available certificates of analysis, and recognized certifications.

Digestibility and mixability (10%): Consumer feedback on bloating, texture, and ease of mixing; whether digestive enzyme blends are included.

Customer reviews and satisfaction (5%): Verified ratings and long-term use feedback across multiple platforms.

Value and pricing (5%): Overall value based on retail pricing, serving count, and caloric output per container.

Best Mass Gainer Protein Powders: 2026 Comparison

Rank	Brand	Cal/Serving	Protein (g)	Carbs (g)	Sugar (g)	Protein Type	3rd-Party Tested	Best For
1	Naked Nutrition – Naked Mass	1,250	50	252	21g	Whey concentrate + casein (grass-fed)	Yes (heavy metals)	Hardgainers, clean-label bulking
2	Naked Nutrition – Vegan Naked Mass	1,230	50	245	56g	Pea + rice protein	Yes (heavy metals)	Plant-based hardgainers
3	Transparent Labs Mass Gainer	780	53	110	12g	Grass-fed whey concentrate	Yes (claimed)	Lean bulking, ingredient-conscious athletes
4	Rival Nutrition Clean Gainer	~561	30	99	9g	Whey concentrate + isolate + casein blend	Yes (Informed Choice + NSF facility)	Budget-conscious, whole-food carb preference
5	Crazy Nutrition Mass Gainer	488	40	55	Not disclosed	Whey concentrate + milk protein concentrate	No	Lean gainers, oat-based carb preference
6	Mutant Mass	1,100	56	192	18g	Whey concentrate + isolate + casein blend	No (GMP facility)	High-volume bodybuilders
7	Optimum Nutrition Serious Mass	1,250	50	251	20g	Whey concentrate + casein + egg albumen	No (GMP/NSF facility)	Classic hardgainer formula
8	Dymatize Super Mass Gainer	1,280	52	245	23g	Whey + milk isolate + casein blend	Claimed (cGMP)	High-calorie athletes
9	MuscleTech Mass Tech Extreme 2000	2,130	60	460	24g	Whey concentrate + isolate + hydrolysate	Claimed (GMP)	Extreme hardgainers
10	Huel Black Edition	400	40	24	4g	Pea + rice protein blend	No (B Corp, GMP)	Lean mass, meal replacement, vegans

Nutritional data sourced from publicly available nutrition labels and verified third-party nutrition databases.

Individual Product Reviews

#1 Naked Nutrition – Naked Mass

The mass gainer category has a problem that does not get discussed enough: most products in it are built to look impressive on a nutrition label while quietly containing things that have no business being in a supplement. Artificial dyes, sucralose, acesulfame potassium, ingredient decks that run 30 items long. Naked Mass does none of that, and it delivers the same calorie density as the category’s most established products while doing it with three ingredients.

Three. Organic tapioca maltodextrin, whey protein concentrate, micellar casein. That is the formula. Both proteins are sourced from grass-fed cows free of rBST and artificial hormones. Heavy metal testing is conducted and the results are available. No artificial flavors, no artificial colors, no sweeteners of any kind in the unflavored version. 1,250 calories per serving, 50 grams of protein, 11.5 grams of BCAAs.

For a hardgainer who wants a mass gainer they can actually trust to contain what it says and nothing else, the choice in this category is not complicated.

Key Product Specifications:

• Calories Per Serving: 1,250
• Protein Per Serving: 50g
• Carbs Per Serving: 252g
• Sugar Content: 21g
• Protein Type: Whey protein concentrate + micellar casein (grass-fed)
• Carb Source: Organic tapioca maltodextrin
• Added Ingredients: None
• Third-Party Tested: Yes (heavy metals)
• Container Size: 8 lb (~15 servings)
• Price: ~$89.99 one-time / ~$75.00 subscription

Strengths: Three-ingredient formula, full stop. Both proteins grass-fed and hormone-free. No artificial flavors, colors, or sweeteners. 11.5 grams of BCAAs per serving. Third-party heavy metal testing. Available flavored and unflavored.

Considerations: Carbohydrates come entirely from organic tapioca maltodextrin with no whole-food carb sources or fiber. At 81.9 percent of calories from carbs, the macro profile is heavily carbohydrate-dominant. The unflavored version divides reviewers on taste. No NSF Certified Sport or Informed Sport banned-substance certification.

Customer Reviews: Over 1,000 reviews on the Naked Nutrition site and nearly 4,000 on Amazon. The clean ingredient list is the consistent purchase driver, specifically among buyers who have tried other mass gainers and found their ingredient lists unacceptable. Effective weight gain and strong digestive tolerance are the two most cited results. The unflavored version draws criticism for its neutral profile; the flavored versions fare better. Slightly gritty texture is occasionally noted and resolved by blending.

#2 Naked Nutrition – Vegan Naked Mass

Everything that makes Naked Mass the top-ranked product in this review applies to Vegan Naked Mass, with one fundamental substitution: pea and rice protein replace the grass-fed whey and casein. The macro profile is nearly identical at 1,230 calories and 50 grams of protein per serving. The commitment to minimal ingredients holds: five ingredients total, pea protein, rice protein, organic tapioca maltodextrin, organic coconut sugar, and natural vanilla, with no artificial additives of any kind. Pea and rice proteins complement each other to provide a more complete amino acid profile than either delivers alone, and heavy metal testing is conducted on the same basis as the whey version.

The one number that requires honest acknowledgment is the 56 grams of sugar per serving from the organic coconut sugar, which is meaningfully high. It is a natural source rather than a refined one, but buyers who are tracking macros carefully or monitoring sugar intake will want to factor that in before purchasing.

Key Product Specifications:

• Calories Per Serving: 1,230
• Protein Per Serving: 50g
• Carbs Per Serving: 245g
• Sugar Content: 56g (from organic coconut sugar)
• Protein Type: Pea protein + rice protein (non-GMO, dairy-free)
• Carb Source: Organic tapioca maltodextrin + organic coconut sugar
• Added Ingredients: None
• Third-Party Tested: Yes (heavy metals)
• Container Size: 8 lb (~15 servings)
• Price: $69.99 one-time / $55.99 subscription

Strengths: Five-ingredient formula with nothing artificial. Pea and rice combination for complementary amino acid coverage. 10.3 grams of BCAAs per serving. Non-GMO, dairy-free, gluten-free, soy-free. Third-party heavy metal testing. Lower price point than the whey version.

Considerations: 56 grams of sugar per serving from organic coconut sugar is significant for buyers monitoring sugar intake. Carbohydrates still come primarily from tapioca maltodextrin with no whole-food sources. No banned-substance certification beyond heavy metal testing.

Customer Reviews: Plant-based athletes point to digestibility and the clean ingredient list as the primary reasons for choosing it. Absence of the digestive discomfort some experience with dairy-based gainers is frequently mentioned. The sugar content from coconut sugar is the most cited concern among buyers who track macros carefully. Mixing feedback is positive when a blender is used.

#3 Transparent Labs Mass Gainer

Transparent Labs approaches the mass gainer category differently than most brands in it. Rather than maximizing calorie density at any ingredient cost, the product prioritizes carbohydrate source quality and overall formula cleanliness, accepting a lower calorie count per serving as the tradeoff. At 780 calories per serving it is a leaner formula than most products in this category, but what it brings in exchange is a carbohydrate profile that actually looks like food: organic tapioca maltodextrin alongside oat powder and sweet potato flour rather than maltodextrin and refined sugar. Grass-fed whey concentrate, no artificial flavors or sweeteners, stevia and monk fruit instead. Fifty-three grams of protein per serving, the highest in this review.

The honest limitations: the COA was not publicly accessible at the time of writing, which makes the testing claim a claim rather than a verified fact. At 780 calories per serving, a hardgainer who needs 1,200 to 1,500 additional calories daily would need to use nearly two servings, which increases the daily cost significantly.

Key Product Specifications:

• Calories Per Serving: 780
• Protein Per Serving: 53g
• Carbs Per Serving: 110g
• Sugar Content: 12g
• Protein Type: Grass-fed whey concentrate
• Carb Source: Organic tapioca maltodextrin, oat powder, sweet potato flour
• Added Ingredients: MCT powder, VitaFiber (prebiotic fiber), coconut milk powder
• Third-Party Tested: Yes (claimed; COA not publicly available at time of writing)
• Container Size: 5 lb (15 servings)
• Price: ~$79-$89 per container

Strengths: Oat powder and sweet potato flour alongside maltodextrin for genuine carbohydrate variety. Highest protein per serving in this review at 53 grams. Grass-fed whey concentrate with hormone-free and antibiotic-free sourcing. No artificial flavors, colors, or sweeteners. MCT powder and prebiotic fiber included.

Considerations: COA not publicly accessible at time of writing. Two servings required to match the calorie output of Naked Mass, meaningfully increasing daily cost. BCAA and leucine content not disclosed. Only two flavor options.

Customer Reviews: Natural taste, digestibility, and ingredient confidence are the consistent themes. Average approximately 4.4 out of 5 stars on third-party retailer sites. Slight grittiness is occasionally noted. Hardgainers with very high caloric requirements sometimes note that the lower calorie count per serving makes it a less efficient daily driver.

#4 Rival Nutrition Clean Gainer

Rival Nutrition holds a specific credential that no other high-calorie product in this review carries: Informed Choice certification, with manufacturing in an NSF-certified facility. For the competitive athlete who requires documented banned-substance testing, that credential is real and it matters. The carbohydrate profile is also the most diverse in this review, incorporating quinoa, oats, rice bran, blueberries, and ginger alongside maltodextrin in a way that genuinely earns the whole-food designation rather than just implying it. Digestive enzymes and MCTs are included. And at approximately $2.73 per serving, it is the lowest per-serving cost of any priced product reviewed.

Those strengths come packaged with meaningful tradeoffs. At approximately 561 calories per serving it delivers significantly fewer calories than Naked Mass, meaning a hardgainer who needs a meaningful daily surplus would need multiple servings, compounding both cost and daily powder volume. The protein per serving at 30 grams is lower than most competitors. And the formula contains sucralose and artificial flavors, which sit in direct contrast to the clean-label approach that positions Naked Mass at the top of this list.

Key Product Specifications:

• Calories Per Serving: ~561
• Protein Per Serving: 30g
• Carbs Per Serving: 99g
• Sugar Content: 9g (includes 4g added sugars)
• Protein Type: Whey protein concentrate + whey isolate + milk protein isolate + micellar casein
• Carb Source: Maltodextrin + organic quinoa + blueberry powder + ginger root + organic rice bran + oat fiber
• Added Ingredients: Flaxseed powder, avocado powder, sunflower oil powder, MCTs, digestive enzymes
• Third-Party Tested: Yes (Informed Choice certified; NSF-certified facility)
• Container Size: 5 lb (~15 servings)
• Price: ~$40 (~$2.73 per serving)

Strengths: Strongest independent testing credentials of any product in this review with Informed Choice certification and NSF-certified manufacturing. Most diverse whole-food carbohydrate profile in the review. Digestive enzymes and MCTs included. Multi-source protein matrix. Lowest per-serving cost reviewed.

Considerations: Approximately 561 calories per serving requires multiple servings for hardgainers needing substantial daily surpluses. Thirty grams of protein per serving is below most competitors. Contains sucralose and artificial flavors. Higher daily powder volume required to match higher-calorie alternatives.

Customer Reviews: Taste and digestibility are what buyers consistently praise, with the whole-food ingredient profile and lower sugar content cited as the reasons for choosing it over competing products. Average approximately 4.6 out of 5 stars on retailer sites. Occasional clumping when mixed by hand rather than blended is the most common complaint. Long-term digestive tolerance is generally reported as good.

#5 Crazy Nutrition Mass Gainer

Crazy Nutrition occupies a specific corner of this category that is genuinely underserved: the buyer who wants to gain mass but wants tight control over the carbohydrate contribution. At 488 calories and a protein-to-carb ratio of 0.73, this product sits closer to a high-calorie protein powder than a traditional mass gainer in its macro balance. The primary carbohydrate source is gluten-free oat flour, which is a meaningful upgrade over maltodextrin-dominant formulas. A digestive enzyme blend (DigEzyme) and piperine are included for absorption support. B-vitamins and minerals round out the formula.

The limitations are worth naming directly. No third-party testing certifications. A price point that is notably high relative to the calories delivered, making it an inefficient option for buyers who genuinely need to consume large calorie volumes. Sucralose is in the formula. And 488 calories per serving means multiple servings per day to achieve a meaningful bulking surplus, which compounds cost quickly.

Key Product Specifications:

• Calories Per Serving: 488
• Protein Per Serving: 40g
• Carbs Per Serving: 55g
• Sugar Content: Not disclosed
• Protein Type: Whey protein concentrate + milk protein concentrate
• Carb Source: Gluten-free oat flour + small amount of maltodextrin
• Added Ingredients: MCT oil powder, DigEzyme digestive enzyme blend, piperine, B-vitamins, minerals
• Third-Party Tested: No
• Container Size: ~20-serving pouch
• Price: $89.99 one-time / $62.99 subscription

Strengths: Highest protein-to-carb ratio of any product in this review with more than 400 calories per serving. Oat flour as primary carbohydrate source provides more complex, lower-glycemic carbs than maltodextrin. DigEzyme digestive enzyme blend included. No artificial colors. B-vitamins and minerals included.

Considerations: No third-party testing. High price relative to calories delivered. Contains sucralose. At 488 calories per serving, multiple daily servings required for hardgainers. Relatively newer brand under a UK parent company.

Customer Reviews: Pleasant taste and easy mixing are consistently praised. Digestive comfort is rated positively, which the enzyme blend likely contributes to. The price relative to calories delivered is the most consistent and specific criticism across reviews.

#6 Mutant Mass

Mutant Mass is built for a specific buyer: the high-volume bodybuilder who wants maximum calories, maximum protein, and ingredient variety in the macro profile to justify both. At 1,100 calories and 56 grams of protein per serving, the raw numbers are strong. The carbohydrate blend is more varied than most products at this calorie level, incorporating waxy maize, barley starch, sweet potato, and rolled oats alongside maltodextrin rather than relying on maltodextrin alone. The fat blend brings coconut oil, avocado, flaxseed, and sunflower oil, providing MCTs alongside a range of fat sources. Digestive enzymes are included.

What Mutant Mass cannot offer at this calorie density is what Naked Mass provides at the same level: sourcing transparency, independent testing, and a formula you can read in under 10 seconds. No independent third-party certifications are accessible. The formula contains sucralose. The brand history is not publicly documented. For buyers whose priority is high calories with ingredients they can trace and trust, Naked Mass covers the same calorie range with a dramatically simpler and more transparent formula.

Key Product Specifications:

• Calories Per Serving: 1,100
• Protein Per Serving: 56g
• Carbs Per Serving: 192g
• Sugar Content: 18g
• Protein Type: Whey protein concentrate + whey isolate + milk protein isolate + micellar casein
• Carb Source: Waxy maize + maltodextrin + barley starch + sweet potato + rolled oats
• Added Ingredients: Digestive enzymes, MCT-rich fat blend (coconut, avocado, flaxseed, sunflower oil)
• Third-Party Tested: No (GMP-compliant facility; no independent certifications)
• Container Size: 5 lb and 15 lb options
• Price: ~$99 for 15 lb

Strengths: Highest protein per serving in this review at 56 grams. Multi-source protein matrix for fast-to-slow digestion coverage. Diverse carbohydrate blend incorporating sweet potato, oats, and barley starch. Multi-source fat blend with MCTs. Digestive enzymes included. Large bag sizes for cost efficiency.

Considerations: No independent third-party certifications. Contains sucralose. Brand history not publicly documented. Eighteen grams of sugar per serving.

Customer Reviews: Significant weight gain results and strong taste, particularly in chocolate flavors, dominate positive reviews. Thick texture is occasionally noted. High sugar content is the most frequently cited concern from buyers reading nutrition labels carefully. Overall ratings on retailer sites are positive.

#7 Optimum Nutrition Serious Mass

Serious Mass has been on the market long enough to have accumulated tens of thousands of reviews, and that accumulated volume says something real about its reach in the market. What it does not say is that the formula has kept pace with what buyers in 2026 should reasonably expect from a product at this calorie level.

The direct comparison with Naked Mass is unavoidable because both products deliver 1,250 calories and 50 grams of protein per serving. On every other meaningful dimension, Serious Mass falls short. Carbohydrates come entirely from maltodextrin with no whole-food sources. The formula contains artificial flavors, artificial colors, acesulfame-potassium, and sucralose. No independent third-party certifications are accessible. Naked Mass matches it calorie for calorie and gram for gram with three ingredients and grass-fed sourcing. Brand longevity is a real thing and worth respecting, but it is not a substitute for ingredient quality, and ingredient quality is where this product has not kept up.

Key Product Specifications:

• Calories Per Serving: 1,250
• Protein Per Serving: 50g
• Carbs Per Serving: 251g
• Sugar Content: 20g
• Protein Type: Whey protein concentrate + calcium caseinate + egg albumen
• Carb Source: Primarily maltodextrin + sweet dairy whey
• Added Ingredients: Creatine monohydrate, glutamine peptides, choline, inositol, vitamin and mineral blend, MCTs
• Third-Party Tested: No (GMP/NSF facility; not Informed Sport certified)
• Container Size: 6 lb, 12 lb, and 20 lb options
• Price: ~$44.99 (6 lb) to $99.99 (20 lb)

Strengths: One of the most reviewed products in this category with tens of thousands of verified ratings. Added creatine monohydrate and glutamine peptides not present in most competing formulas. Multi-source protein for varied digestion rates. Strong per-serving value at larger container sizes. Optimum Nutrition has been manufacturing since 1986.

Considerations: Carbohydrates entirely from maltodextrin with no whole-food sources. Artificial flavors and colors. Sweetened with acesulfame-potassium and sucralose. No independent third-party certification. Twenty grams of sugar per serving.

Customer Reviews: Effective weight gain and wide flavor availability are what keep buyers returning. Average approximately 4.5 out of 5 stars across major platforms. Very sweet taste, the challenge of mixing a 334-gram serving without a blender, and the maltodextrin-only carbohydrate base are the most consistent criticisms. Buyers who prioritize clean labels reliably look elsewhere.

#8 Dymatize Super Mass Gainer

Dymatize has been in the supplement industry since 1994 and Super Mass Gainer reflects both the strengths and the tradeoffs of that legacy positioning. The protein matrix is one of the most comprehensively sourced in this review, combining whey protein concentrate, milk protein isolate, whey protein isolate, whey protein hydrolysate, and micellar casein, covering the full fast-to-slow digestion spectrum. The BCAA and leucine disclosure is notably specific: 10.7 grams of BCAAs and 5.1 grams of leucine per serving, both quantified on the label in a way most competitors do not bother to do. Creatine monohydrate is included.

The formula also contains 23 grams of sugar per serving including 14 grams of added sugar, which is the highest added sugar content in this review. Carbohydrates come primarily from maltodextrin and fructose with no whole-food sources. Artificial flavors, artificial colors, acesulfame-potassium, sucralose, and multiple gums are all present. For buyers who specifically want the protein matrix depth and the BCAA disclosure and are less focused on ingredient cleanliness, Dymatize is a legitimate option. For buyers comparing it to Naked Mass on overall label quality at a similar calorie level, the gap is significant.

Key Product Specifications:

• Calories Per Serving: 1,280
• Protein Per Serving: 52g
• Carbs Per Serving: 245g
• Sugar Content: 23g (14g added sugar)
• Protein Type: Whey protein concentrate + milk protein isolate + whey protein isolate + whey protein hydrolysate + micellar casein
• Carb Source: Primarily maltodextrin + fructose + sunflower creamer
• Added Ingredients: Creatine monohydrate, BCAAs (10.7g), vitamin and mineral blend
• Third-Party Tested: Claimed (cGMP facility); specific certifications not accessible
• Container Size: 6 lb (~8 servings) and larger
• Price: ~$45 for 6 lb

Strengths: Five-source protein matrix covering the full digestion spectrum. Both BCAAs at 10.7 grams and leucine at 5.1 grams quantified on the label. Creatine monohydrate included. cGMP facility with claimed banned-substance testing. Established manufacturing history since 1994.

Considerations: Highest added sugar content in this review at 14 grams per serving. Carbohydrates primarily from maltodextrin and fructose with no whole-food sources. Artificial flavors, colors, acesulfame-potassium, sucralose, and multiple gums. Independent certifications not publicly accessible.

Customer Reviews: Strong taste scores, with the product frequently described as very sweet. Digestive comfort is generally positive when mixed thoroughly. The disclosed BCAA content is appreciated by performance-oriented buyers. High added sugar is the most consistently raised concern among buyers who read labels closely.

#9 MuscleTech Mass Tech Extreme 2000

Mass Tech Extreme 2000 is the product in this review for buyers who have tried conventional mass gainers and found them insufficient. At 2,130 calories per serving from six scoops, it occupies a category within a category. The formula includes 5 grams of creatine monohydrate, 6.4 grams of leucine fully disclosed, 10.6 grams of glutamine and glutamic acid, and a multi-phase carbohydrate blend that incorporates oat bran and isomaltulose alongside maltodextrin for both fast and slow-releasing carbohydrate contribution. Per-batch quality and purity testing is stated on the label.

This product is not for most people. It is genuinely for extreme hardgainers who cannot gain weight on conventional mass gainers and require a very high daily caloric intake to achieve any surplus at all. For that specific buyer, the calorie density and performance ingredient stack make a compelling case. For everyone else, a 569-gram six-scoop serving that delivers 460 grams of carbohydrates, artificial sweeteners, and gums is more than most training protocols require.

Key Product Specifications:

• Calories Per Serving: 2,130
• Protein Per Serving: 60g
• Carbs Per Serving: 460g
• Sugar Content: 24g
• Protein Type: Whey protein concentrate + hydrolyzed whey protein isolate + whey protein isolate
• Carb Source: Maltodextrin + oat bran + isomaltulose (Palatinose)
• Added Ingredients: Creatine monohydrate (5g), leucine (6.4g), valine (3.4g), isoleucine (3.4g), glutamine/glutamic acid (10.6g), MCTs, vitamin and mineral blend
• Third-Party Tested: Claimed (GMP; per-batch testing stated on label)
• Container Size: 6 lb (~5 servings), 12 lb, and 20 lb
• Price: ~$44.99 (6 lb) to $99.99 (20 lb)

Strengths: Highest calorie count per serving in this review at 2,130. Sixty grams of protein with leucine, valine, and isoleucine all fully disclosed. Five grams of creatine monohydrate per serving. Multi-phase carbohydrate blend with some slow-release contribution from oat bran and isomaltulose. Per-batch testing stated.

Considerations: 460 grams of carbohydrates per serving is extreme and appropriate only for very specific high-calorie training phases. Contains artificial flavors, sucralose, acesulfame-potassium, and multiple gums. Independent certifications beyond GMP not publicly accessible. Six-scoop serving size makes mixing and consuming more involved. Some users report digestive discomfort at this serving volume.

Customer Reviews: Significant and rapid weight gain is what buyers come for and what the reviews confirm. The volume required per serving and occasional digestive discomfort, particularly for buyers new to high-calorie supplements, are the most consistent limitations. Average approximately 4.4 out of 5 stars on retailer sites.

#10 Huel Black Edition

Huel Black Edition is not a mass gainer in the conventional sense, and including it in this review requires an honest explanation of why it belongs here at all. At 400 calories per serving it does not approach the calorie density of the products above it. What it offers instead is something none of the others in this review provides: a nutritionally complete formula that functions as both a protein-forward meal replacement and a controlled caloric addition for athletes targeting lean mass rather than aggressive bulk.

The protein blend is pea and rice, making it fully plant-based and lactose-free. The formula includes probiotics, green tea extract, kombucha powder, ground flaxseed, MCT powder, and a comprehensive vitamin and mineral profile. Sugar content at 4 grams per serving is the lowest in this entire review. Carbohydrates at 24 grams per serving are the lowest as well. Huel achieved B Corp certification in 2023. For vegans, for busy professionals who want nutritional completeness alongside muscle-building support, and for athletes who want to add calories in controlled increments rather than in one large serving, it is the most distinct option in this review.

Key Product Specifications:

• Calories Per Serving: 400
• Protein Per Serving: 40g
• Carbs Per Serving: 24g
• Sugar Content: 4g
• Protein Type: Pea protein + brown rice protein
• Carb Source: Tapioca flour + organic coconut sugar + small amount of maltodextrin
• Added Ingredients: Ground flaxseed, MCT powder, probiotics (Bacillus coagulans), green tea extract, kombucha powder, vitamins and minerals
• Third-Party Tested: No (B Corp certified 2023; GMP manufacturing in UK)
• Container Size: 17-serving bags
• Price: ~$53 one-time / ~$42.50 subscription

Strengths: Most complete micronutrient profile in this review; functions as a full meal replacement. Lowest sugar content in the review at 4 grams per serving. Lowest carbohydrate count at 24 grams, making it the most macro-flexible option. Plant-based and lactose-free. Probiotics, green tea extract, kombucha, and flaxseed included. B Corp certified. Over 19,000 Trustpilot reviews averaging 4.2 out of 5.

Considerations: At 400 calories per serving, multiple daily servings required to approach a meaningful caloric surplus, significantly increasing daily cost. Not third-party tested for banned substances. Contains xanthan gum. Chalky texture noted by a meaningful share of reviewers.

Customer Reviews: Convenience, nutritional completeness, and digestive comfort are what the large and engaged Huel community consistently cites. Chalky texture is the most frequently raised criticism across more than 19,000 Trustpilot reviews. Athletes using it specifically for mass gaining typically use multiple servings distributed through the day rather than a single large serving.

How to Evaluate a Mass Gainer Protein Powder

The mass gainer category is where marketing language works hardest because the differences between products are often hidden inside numbers that look similar on the surface. A few things that actually separate quality products from those that just look like them.

The carbohydrate source is the single biggest quality differentiator in this category. Maltodextrin is everywhere because it is cheap, calorie-dense, and easy to blend. It is also high-glycemic and delivers no fiber or micronutrients. Products that incorporate oat powder, sweet potato, quinoa, barley starch, or rice bran offer more sustained energy and meaningfully better digestive tolerance. When you open a label and see maltodextrin as the only or primary carbohydrate source, you are looking at a calorie vehicle with limited nutritional complexity beyond the protein.

The protein-to-carb ratio tells you what kind of product you are actually buying. Divide grams of protein by grams of carbohydrates. A ratio closer to 1.0 is a leaner formula. A ratio below 0.25 is heavily carbohydrate-dominant. Neither is wrong for the right user, but knowing where a product sits on that spectrum is essential for matching it to your actual goals.

Sugar content deserves specific attention because many mass gainers pad calorie counts and improve taste by adding sugars inexpensively. Above 15 to 20 grams of added sugar per serving is worth flagging if you care about what the calories are actually coming from.

Independent testing is more meaningful in this category than in most because the serving sizes are so large. A single serving of some products in this review uses over 500 grams of powder. Knowing that heavy metals, contaminants, and banned substances have been independently verified at that kind of consumption volume matters more than it does for a 30-gram protein serving.

Count the ingredients. It takes 10 seconds and it tells you more about a product than any marketing claim on the front of the label.

Factor	Minimum	Average	Excellent
Calorie source	Pure maltodextrin	Maltodextrin blend	Whole-food carb sources including oats, sweet potato, quinoa
Protein quality	Low-grade concentrate	Whey concentrate	High-quality isolate or transparent multi-source blend
Sugar content	25g+ per serving	10 to 20g per serving	Under 10g per serving
Testing	No testing claims	Basic GMP compliance	Third-party tested with certifications
Digestibility	Frequent bloating reports	Mixed feedback	Enzyme support, low GI complaints

Questions to Ask Before Buying a Mass Gainer

What is the primary carbohydrate source? Is it maltodextrin, oat flour, whole-food blends, or a combination of sources?

How much added sugar does each serving contain, and what is the sweetener source?

Is the protein from an isolate, concentrate, or blend, and are the sources fully disclosed on the label?

Is the calorie count built from quality macronutrients or padded with cheap sugars and fillers?

Has the product been independently tested by a recognized third party?

How many ingredients are listed, and can you identify all of them?

Does the formula include digestive enzymes, which can matter significantly at very large serving sizes?

Who Should Avoid Mass Gainers?

People trying to lose body fat should not use mass gainers. These products are built for caloric surplus; using them during a fat-loss phase works directly against the goal.

Individuals with diabetes or blood sugar concerns need to approach this category carefully. Most mass gainers derive the majority of their carbohydrates from high-glycemic sources, and some products in this review exceed 50 grams of sugar per serving. Consulting a physician before use is appropriate.

People prone to digestive issues may struggle with products in the 1,000-plus calorie range, which can require 300 to 500 grams of powder per serving. Starting with a smaller serving and building gradually, or choosing a product with a digestive enzyme blend, reduces that risk.

Individuals with lactose intolerance should note that most mass gainers in this category are dairy-based. Vegan Naked Mass and Huel Black Edition are the two plant-based alternatives in this review that avoid that concern entirely.

Final Recommendation

The mass gainer category asks a specific question about what you are willing to accept in your supplement. Most products in it answer that question with long ingredient lists, artificial sweeteners, and carbohydrate profiles built around cheap fillers. A small number of products answer it differently.

Naked Mass answers it with three ingredients, grass-fed proteins, published heavy metal testing, and 1,250 calories per serving, at a price that does not require a premium justification. No other product in this review puts that combination together at that calorie density. Products with better testing credentials deliver fewer calories. Products at the same calorie level carry longer ingredient lists and artificial additives. Naked Mass occupies a position in this category that nothing else reviewed here replicates.

For plant-based athletes, Vegan Naked Mass delivers nearly identical macros with the same minimal-ingredient approach and is the straightforward recommendation for anyone avoiding dairy. For the competitive athlete who specifically requires Informed Choice banned-substance certification, Rival Nutrition Clean Gainer carries the credential, with the understanding that its calorie density requires multiple daily servings to match what Naked Mass delivers in one.

For everyone else, the answer is Naked Mass. You can learn more at the Naked Nutrition website.

Pricing data reflects typical U.S. retail pricing as of early 2026. Prices may vary by retailer and over time. Nutritional data sourced from publicly available nutrition labels and verified third-party nutrition databases.