10 Best Muscle Mass Gainers in 2026

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For building serious size, the Optimum Nutrition Gold Standard Pro Gainer is our best overall pick, delivering 60g of protein and 650 calories per serving with less than 8g of sugar and easy mixing. Hardgainers needing more calories should look at the Dymatize Super Mass Gainer, while those wanting clean ingredients will appreciate the NAKED Mass Natural Weight Gainer.

The challenge with mass gainers isn’t just finding one that packs calories, it’s finding one that fits your digestive system, training goals, and flavor preferences without loading you up with cheap sugars or fillers. A 1,200-calorie shake does you no good if it sits like a rock in your stomach.

This guide is research-based, drawing on manufacturer specifications, expert round-ups, and patterns in owner feedback to help you choose confidently from the top options. We’ve focused on what actually matters: protein quality, calorie density, ingredient transparency, and how each product fits different body types and training phases.

Top 10 Muscle Mass Gainers in the Market

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The Best Muscle Mass Gainers, Reviewed

#1Best Overall

Optimum Nutrition Gold Standard Pro Gainer

Optimum Nutrition Gold Standard Pro Gainer
Calories650 per serving
Protein60g per serving
Carbs80g+ per serving
SugarLess than 8g per serving
Weight10.2 pounds
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What We Like

  • 60g protein per serving
  • 650 calories per serving
  • Less than 8g sugar
  • Easy mixing formula

Trade-offs

  • 10.2-pound tub is heavy to handle
  • Only 650 calories per serving

Sixty grams of protein in a single scoop means you can hit your daily target without blending three different shakes. That kind of density makes it a smart choice for anyone who struggles to eat enough whole food but wants steady muscle gains. The 650 calories come with over 80 grams of carbs to refuel after training, and the sugar stays under 8 grams, so you are not just drinking candy. It fits the person who wants a reliable, high-protein mass gainer that mixes easily and does not leave a sticky sweet aftertaste.

The trade-off is that 650 calories per serving is lower than some extreme gainers on the shelf. If you need 1,280-plus calories in a single shake, Dymatize Super Mass Gainer delivers that in one go. But that also means a bigger sugar load and a thicker drink. For most people who want a balanced, everyday mass gainer that supports recovery without overdoing it, this tub hits the sweet spot. Just be ready to lift a 10-pound container out of the pantry.

Best for: Anyone who wants a high-protein, moderate-calorie mass gainer with low sugar and easy mixing. Not ideal for those needing over 1,000 calories per serving.
#2Best High-Calorie Mass Gainer

Dymatize Super Mass Gainer

Dymatize Super Mass Gainer
Calories1,280 per serving
Protein52g per serving
Carbs245g per serving
BCAAs10.7g per serving
Creatine1g per serving
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What We Like

  • 1,280 calories per serving for serious gains
  • 52g protein from whey and casein blend
  • Contains 1g creatine for strength support
  • Includes 14 vitamins and minerals

Trade-offs

  • Only 8 servings per 6 lb container
  • 1g creatine is a small dose per serving

With 1,280 calories and 52 grams of protein per serving, this mass gainer delivers a dense caloric boost for serious muscle growth without needing multiple scoops. The blend of whey and casein provides both fast- and slow-digesting proteins, while the added 1g of creatine offers a small boost for strength work. If your goal is adding size and you struggle to eat enough whole food, this shake makes hitting your daily surplus feel manageable.

The trade-off is portion control: each serving delivers 245 grams of carbs, which is a lot for anyone who isn’t training hard or who prefers a lower-carb approach. A 6-pound tub gives only eight servings, so you will go through it quickly if you use it daily.

Best for: Hardgainers and athletes who need a dense, high-calorie shake with sustained protein delivery. Not ideal for those watching carb intake or wanting a longer-lasting tub.

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#3Best High-Calorie Classic

Optimum Nutrition Serious Mass

Optimum Nutrition Serious Mass
Protein per serving50g blended protein
Vitamins & minerals20+ essential
Weight2.0 pounds
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What We Like

  • 50g blended protein supports muscle repair
  • Includes 20+ vitamins and minerals

Trade-offs

  • 2-pound tub is small for daily use
  • No vegan or plant-based protein option

It suits lifters who want a classic, high-calorie shake they can customize with milk, peanut butter, or fruit without worrying about falling short on their daily intake.

The real trade-off here is the sheer volume of the serving size. Two scoops can feel like a meal in a glass, which might be tough to finish if you are not used to dense shakes. Compared to the Dymatize Super Mass Gainer, which offers a similar calorie count in a slightly different protein blend, Serious Mass leans harder on carbs and a broader vitamin profile, making it a better fit for those who want more than just protein and calories. It is not ideal for anyone watching carbohydrate intake or preferring a lighter, quicker shake.

Best for: Lifters who need a high-calorie, carb-heavy mass gainer with added vitamins to support bulking phases. Not ideal for those on low-carb diets or who prefer a lighter shake.
#4Best Clean Ingredients

NAKED Mass Natural Weight Gainer

NAKED Mass Natural Weight Gainer
Calories per serving1,250
Protein per serving50g
Carb sourceOrganic tapioca maltodextrin
CertificationsNSF Certified
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What We Like

  • NSF Certified for purity and safety
  • 5g sugar per serving
  • Fast and slow protein blend

Trade-offs

  • Unflavored means you add taste yourself
  • 8 lb tub takes up pantry space

1,250 calories and 50 grams of protein per scoop might sound like a lot, but that is exactly the point if you are a hard gainer who has trouble getting enough calories. What sets NAKED Mass apart is its three-ingredient list: grass-fed whey, micellar casein, and organic tapioca maltodextrin. No artificial sweeteners, no soy, no gluten, and only 5 grams of sugar. That simplicity makes it a go-to for anyone who wants a weight gainer that feels more like real food than a chemistry experiment. It is also NSF Certified, so you know what is on the label is what is in the bag.

This is unflavored, which means you will need to blend it with fruit, cocoa, or peanut butter to make it taste like anything. If you prefer a shake that is ready to drink straight from the shaker, a pre-flavored option is available. But if you are okay playing kitchen alchemist for a few minutes, NAKED Mass gives you total control over what goes in your body.

Best for: Hard gainers who want a clean, minimally processed weight gainer with no artificial ingredients. Not ideal for those who want a ready-to-drink flavored shake.

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#5Best Whole-Food Blend

Mutant Mass Extreme Gainer

Mutant Mass Extreme Gainer
Calories per serving1,100
Protein per serving56 g
Whole-food ingredientsBarley, sweet potato, oats, avocado
FlavorTriple Chocolate
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What We Like

  • Includes barley, sweet potato, rolled oats
  • Provides 1,100 calories per serving
  • 56 g protein from whey isolate, concentrate, casein
  • 26.1 g EAAs and 12.2 g BCAAs

Trade-offs

  • Only available in triple chocolate flavor
  • Contains soy (from sunflower oil and possibly other ingredients)

With 1,100 calories and 56 grams of protein per serving, this gainer packs a serious nutritional punch for anyone struggling to get enough calories from whole food alone. What sets it apart is the ingredient list: barley, sweet potato, rolled oats, avocado, coconut oil, flaxseed, pumpkin seed, and sunflower oil bring real-food variety that most mass gainers skip. If you want your shake to feel less like a lab experiment and more like a meal, this blend makes that easier to swallow.

Portion control is the main consideration here: each serving is dense, and the 2.2-pound pouch provides 16 servings, so you will go through it faster than a larger tub from another brand. The triple chocolate flavor is the only option available, so if you prefer vanilla or unflavored, this product locks you into chocolate. It is a smart pick for lifters who prioritize ingredient quality over sheer volume per dollar.

Best for: Someone who wants a mass gainer built around recognizable whole-food ingredients rather than a purely synthetic formula. Not ideal for those who need a neutral or vanilla flavor option.

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#6Best Vegan Mass Gainer

NAKED Vegan Mass

NAKED Vegan Mass
Calories1,230 per serving
Protein50g per serving
Carbs248g complex carbs
IngredientsPea protein, rice protein, tapioca maltodextrin
CertificationNSF Certified
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What We Like

  • NSF Certified for purity and safety
  • Unflavored base lets you customize taste
  • Contains only three ingredients: pea protein, rice protein, tapioca maltodextrin

Trade-offs

  • Unflavored requires mixing with fruit or flavorings for taste
  • Contains maltodextrin, which some avoid for blood sugar reasons

1,230 calories per serving from just three ingredients, pea protein, rice protein, and organic tapioca maltodextrin, makes this about as clean as a mass gainer gets. If you’re vegan or avoiding dairy, soy, and gluten, this is the rare high-calorie option that doesn’t rely on a laundry list of additives or artificial sweeteners. NSF Certification adds a layer of trust for anyone who wants to know exactly what they’re putting in their body.

Because it has no flavor, you will need to blend in fruit, nut butter, or a splash of plant milk to make it palatable. That is fine if you like control, but less convenient if you just want to scoop and drink. For anyone who prioritizes ingredient simplicity over convenience, this is a standout option.

Best for: Vegans or anyone avoiding dairy and soy who wants a clean, high-calorie mass gainer with minimal ingredients.

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#7Best With Creatine

MuscleTech High Protein Mass Gainer

MuscleTech High Protein Mass Gainer
Protein per serving60g
Calories per serving1,500
Creatine per servingHPLC-tested creatine monohydrate
Serving size6 scoops with 2 cups skim milk
BCAAs per serving13g+
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What We Like

  • 60g protein and 1,500 calories per serving
  • Includes HPLC-tested creatine monohydrate for strength
  • 13g+ BCAAs and 6.3g L-leucine per serving
  • Vanilla Milkshake flavor from top flavor houses

Trade-offs

  • 6-scoop serving requires mixing with 2 cups skim milk
  • Not suitable for those avoiding creatine monohydrate

A single serving delivers 60g of protein and 1,500 calories when mixed with 2 cups of skim milk, along with HPLC-tested creatine monohydrate. This makes it a high-calorie option for those focused on weight gain and muscle building, with the creatine providing a performance-focused addition not found in every mass gainer. The formula also includes 13g+ BCAAs and 6.3g L-leucine per serving, supporting muscle recovery and growth.

The trade-off is the serving size: six scoops plus two cups of skim milk means a thick, heavy shake that takes some planning to get down. If you prefer a lighter option, other mass gainers may offer different serving sizes or calorie profiles, though without the added creatine. For someone who wants both mass and strength support in one tub, this MuscleTech formula keeps things simple and effective.

Best for: Lifters wanting a high-calorie mass gainer with added creatine for muscle building. Not ideal for those who prefer smaller, quicker shakes.

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#8Best Grass-Fed Whey

Transparent Labs Mass Gainer

Transparent Labs Mass Gainer
Calories per serving770
Protein per serving53g
Carbs per serving110g+
Creatine per serving3g
Protein sourceGrass-fed whey concentrate
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What We Like

  • Grass-fed whey for clean protein
  • 770 calories from whole food sources
  • Includes 3g creatine monohydrate
  • No artificial sweeteners or fillers

Trade-offs

  • 15 servings per container limits long-term use
  • Not suitable for those avoiding dairy-based whey protein

Seven hundred and seventy calories per serving from oat flour, organic tapioca maltodextrin, and sweet potato powder make this a serious tool for anyone trying to consistently hit a caloric surplus. The grass-fed whey delivers 53 grams of protein with a complete amino acid profile, and the 3 grams of creatine monohydrate is a nice built-in performance boost for strength work. This is a clean, transparently formulated gainer that avoids artificial sweeteners and fillers, which matters if you want to know exactly what you’re putting in your body.

Portion size is the main factor: with only 15 servings per container, you will reorder more often than with bulk options like NAKED Mass, which offers 8 pounds per bag. The 110-plus grams of carbohydrates per serving are designed to fuel workouts and stabilize energy, making this gainer a good match for active lifters who need that carb load. If you prioritize ingredient quality and a straightforward, no-junk formula, this is a strong pick.

Best for: Lifters who want a clean, grass-fed whey gainer with added creatine and whole-food carbs. Not ideal for those needing a low-carb mass builder or a larger number of servings per purchase.
#9Best Carb-to-Protein Ratio

BSN True-Mass Weight Gainer

BSN True-Mass Weight Gainer
Calories per serving1200
Protein per serving50g
Carb-to-Protein Ratio4:1
Fiber per serving10g
Protein sourcesWhey + Casein
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What We Like

  • 4:1 carb-to-protein ratio
  • 50g multi-source protein per serving
  • 10g fiber per serving
  • 1200 calories per serving

Trade-offs

  • Only 15 servings per container
  • Not ideal for those with smaller appetites.

At 1200 calories per serving, this is a serious calorie load designed for those who struggle to eat enough through food alone. The 4:1 carb-to-protein ratio provides a high amount of carbohydrates alongside 50g of multi-source protein, which includes both whey and casein. The 10g of fiber per serving is a nice bonus, helping with digestion.

A single serving delivers 1,200 calories, which is a lot for one drink. If you are just starting out or have a smaller appetite, you might find it easier to sip something like a different mass gainer that comes in a smaller container size. But for anyone who wants a dense, balanced mass builder that leans heavily on carbs for energy and protein for repair, this is a smart pick.

Best for: Those who need a high-calorie, balanced carb-to-protein ratio to support weight gain and training recovery. Not ideal for those with smaller appetites or who prefer a lower-calorie shake.
#10Best High-Carb Mass Gainer

Rule 1 Proteins Mass Gainer

Rule 1 Proteins Mass Gainer
Calories per serving1,220+
Carbohydrates per serving250g+
Protein per serving40g
CreatinePure monohydrate added
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What We Like

  • 1,220+ calories per serving
  • 250g+ complex carb blend
  • 40g all-whey protein
  • Pure creatine monohydrate added

Trade-offs

  • Requires mixing 18-20 oz of liquid
  • Not a meal replacement, only a supplement

Over 1,220 calories and 250 grams of carbs per serving make this a serious option for anyone who has difficulty consuming enough calories to gain weight. The 6:1 carb-to-protein ratio leans heavily on carbohydrates, which can help refill glycogen stores after hard training and push your daily calorie total up without forcing down another whole meal. This is a straightforward, high-carb formula built for people who know they need a big calorie surplus and want it from a clean, GMP-certified US facility.

With 250 grams of carbs per serving, this is a lot for anyone with a slower metabolism or who is not training intensely. Compared to another mass gainer that offers 60 grams of protein, this one leans harder on carbs and has less protein per serving. That makes it better suited for hardgainers who need the extra energy, but less ideal if you are trying to keep protein higher and carbs lower. Directions call for mixing two scoops with 18-20 ounces of liquid, so a blender with fruit or ice can improve the texture. If your goal is to pack on pounds and you train with serious volume, this mass gainer does exactly what it says.

Best for: Hardgainers who need a high-calorie, carb-heavy supplement to support intense training and weight gain. Not ideal for those watching carbohydrate intake or seeking a higher protein-to-carb ratio.

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How We Evaluated Muscle Mass Gainers

We built this guide by analyzing manufacturer-provided nutritional data, ingredient lists, and third-party certifications for each product. Owner feedback patterns across multiple sources helped us understand real-world mixing ease, taste, and digestive tolerance, details that spec sheets alone can’t capture.

Our evaluation focused on four criteria that matter most for muscle gainers. Protein quality and quantity came first: we looked at grams per serving, protein sources (whey isolate, casein, plant blends), and amino acid profiles. Calorie density and macronutrient balance followed, since a gainer’s purpose is to create a reliable caloric surplus without excessive sugar. Ingredient transparency ranked next; we favored products with clear labeling, minimal artificial additives, and third-party certifications like NSF. Finally, practicality covered serving size, mixing ease, and whether the tub size matched realistic daily use.

A research-led evaluation has limits: we haven’t personally mixed and consumed every shake, so we can’t report on subjective taste or individual digestive response. What we can do is give you the facts to make an informed decision based on your own needs and tolerances.

What To Look For In Muscle Mass Gainers

The best mass gainer for you balances high-quality protein, appropriate calorie density, and ingredients you feel good about putting in your body every day.

Focus on protein quality first, then calories. A gainer with 50g+ of whey or blended protein beats one with 80g of cheap carbs and filler protein. Check the sugar content, aim for under 10g per serving unless you’re intentionally carb-loading.

Protein Source and Amount

Protein is the non-negotiable foundation. Look for at least 40-50g per serving from recognizable sources, whey isolate and concentrate, micellar casein, or complete plant proteins like pea and rice. Multi-source blends provide both fast and slow digestion, which can support muscle protein synthesis over a longer window. Avoid products where protein comes primarily from collagen or gelatin, which have incomplete amino acid profiles for muscle building.

Calorie Density and Carb Quality

Mass gainers range from 650 to over 1,500 calories per serving. Your choice depends on your maintenance calories and how much you can comfortably drink. For carb-heavy options, look for complex sources like oats, sweet potato flour, or tapioca maltodextrin rather than simple sugars. If you’re watching blood sugar, consider a lower-maltodextrin formula or an unflavored base you can mix with your own carb source.

Ingredient Transparency and Certifications

Third-party certifications like NSF Certified for Sport or Informed Choice add a layer of trust, especially if you compete or want assurance against contaminants. Some of the best mass gainer supplements list every ingredient clearly, including digestive enzymes and vitamin profiles. Avoid products with proprietary blends that hide exact amounts of key ingredients.

  • Check the serving size: a 2-scoop serving is manageable; a 6-scoop serving requires serious commitment.
  • Look for added digestive enzymes if you have trouble with heavy shakes.
  • Verify whether the product contains creatine if you’re already supplementing separately.
  • Consider flavor options: unflavored bases let you customize but require extra effort.
  • Review the carb-to-protein ratio, 4:1 is common for mass gainers, but some prefer a tighter 2:1 for leaner gains.

Start with a smaller tub to test tolerance before committing to a 10-pound container. Your stomach will thank you.

Muscle Mass Gainers Compared

The table below compares the ten mass gainers across the specs that matter most for your buying decision, from protein content and calories to serving size and ingredient quality.

ProductCalories per ServingProtein per ServingCarbs per ServingWeight
Optimum Nutrition Gold Standard Pro Gainer65060g80g+10.2 pounds
Dymatize Super Mass Gainer1,28052g245g1.3 pounds
Optimum Nutrition Serious Mass1,200+50g250g+2.0 pounds
NAKED Mass Natural Weight Gainer1,25050g252g8.0 pounds
Mutant Mass Extreme Gainer1,10056gN/A2.2 pounds
NAKED Vegan Mass1,23050g248g8.0 pounds
MuscleTech High Protein Mass Gainer1,50060g304g5.2 pounds
Transparent Labs Mass Gainer77053g110g+7.1 pounds
BSN True-Mass Weight Gainer120050gN/A10.2 pounds
Rule 1 Proteins Mass Gainer1,220+40g250g+6.0 pounds

Frequently Asked Questions

How much protein should a mass gainer have per serving?

Look for at least 40 grams of protein per serving. The best options offer 50-60 grams from blended sources like whey isolate, concentrate, and casein. Higher protein content supports muscle repair and growth, but anything over 60 grams per serving may be more than most people can absorb efficiently in one sitting.

Are mass gainers just sugar and carbs?

No, but some rely heavily on cheap carbs. Quality mass gainer powders use complex carbohydrates from oats, sweet potato, or tapioca maltodextrin rather than simple sugars. Check the label: a good gainer has under 10 grams of sugar per serving and lists whole-food carb sources, not just maltodextrin and corn syrup solids.

Can I use a mass gainer if I’m lactose intolerant?

Yes, but choose carefully. Many mass gainers use whey and casein, which contain lactose. Look for lactose-free whey isolates or plant-based options like NAKED Vegan Mass, which uses pea and rice protein. Start with a small serving to test your tolerance, and consider adding a lactase enzyme supplement if needed.

How do mass gainers differ from regular protein powders?

Mass gainers pack more calories per serving, typically several hundred to over a thousand compared to around a hundred for standard protein powders. They include carbohydrates and fats alongside protein, designed to create a calorie surplus for weight gain. Regular protein powders are better for lean muscle support without the extra calories.

Should I take a mass gainer before or after my workout?

Post-workout is the most common timing, when your muscles are primed for nutrient uptake. The fast-digesting protein helps kickstart recovery. A pre-workout mass gainer can also work if you need extra energy for training, but the full digestive load may feel heavy during intense exercise. Some lifters split the serving, half before, half after.

The Bottom Line

The Optimum Nutrition Gold Standard Pro Gainer earns the best overall spot. It delivers 60 grams of protein with minimal sugar and mixes easily, so it’s a practical, high-quality option for anyone serious about adding lean mass without the digestive struggle. It hits the sweet spot of calorie density for most lifters.

If your metabolism runs hot and you need more fuel, the Dymatize Super Mass Gainer‘s 1,280-calorie serving with added creatine is built for hardgainers. For those who prioritize clean ingredients, the NAKED Mass Natural Weight Gainer offers an NSF-certified, unflavored base with no artificial anything. Looking for protein powders for mass that can double as a gainer?

The single most important factor is matching the serving size and calorie density to your actual daily needs. A gainer you can’t finish or can’t tolerate is a gainer that doesn’t work. Start with the specs, trust your stomach, and give each product a fair two-week trial before deciding.