10 Best Vitamins To Become Fat in 2026

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Our top pick for gaining weight is the NAKED Mass Gainer Protein Powder, which delivers an extremely high 1,360-calorie serving with a clean, five-ingredient list. For those prioritizing vitamin support, the BOOST Very High Calorie Nutritional Drink is our best fortified option, while Mutant Mass wins for its whole food ingredients.

Gaining weight safely requires a consistent calorie surplus, often difficult to achieve through food alone. This guide compares ten mass gainers and nutritional shakes based on calorie density, ingredient quality, and specific user goals, helping you find a reliable supplement to support your weight gain journey.

Top 10 Vitamins To Become Fat in the Market

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The Best Vitamins To Become Fat, Reviewed

#1Best Overall

NAKED Mass Gainer Protein Powder

NAKED Mass Gainer Protein Powder
Calories per serving1,360
Protein per serving50g
Carbohydrates per serving251g
Key ingredientsWhey, casein, organic maltodextrin
CertificationNSF Certified
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What We Like

  • Extremely high 1,360-calorie serving for mass gain
  • Clean, five-ingredient list with no artificial additives
  • NSF certification verifies purity and safety standards
  • Multi-phase protein blend supports sustained amino acid delivery

Trade-offs

  • At 251g of carbs per serving, it demands a high-calorie diet commitment
  • Lacks the extensive vitamin and mineral profile of a product like BOOST Very High Calorie Nutritional Drink

With 1,360 calories per serving, NAKED Mass Gainer delivers the dense caloric payload essential for overcoming a hard-gainer metabolism. It suits the user whose primary barrier is simply eating enough, offering a clean, straightforward formula built from just five recognizable ingredients. The NSF certification provides a layer of trust often missing in this category, appealing to the skeptical tinkerer who prioritizes verified purity over flashy marketing claims.

This mass gainer focuses purely on calories and macronutrients, delivering 1,360 calories, 50g of protein, and 251g of carbs per serving. It relies on just five natural ingredients and lacks added vitamins, so it’s designed as a foundational bulking tool rather than a complete nutritional meal replacement. For comparison, the BOOST Very High Calorie Nutritional Drink includes 26 vitamins and minerals.

Best for: The disciplined hard-gainer seeking a high-calorie, clean-formula foundation for a bulking protocol. Not ideal for those looking for an all-in-one nutritional shake with comprehensive vitamins and minerals.

Product photos

#2Best Multi-Source Protein

BSN True-Mass Weight Gainer Protein Powder

BSN True-Mass Weight Gainer Protein Powder
Calories per serving690
Protein per serving50g
Carb-to-protein ratio2:1
Container size5.8 lb
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What We Like

  • Includes medium-chain triglyceride (MCT) fats
  • Milkshake-like taste from flavor technology
  • Moderate 5.8 lb container is manageable

Trade-offs

  • 2:1 carb-to-protein ratio is less carb-heavy than some mass gainers

A 50-gram protein hit from seven different sources is the main draw here. This makes it a solid choice for someone focused on feeding muscles a diverse array of proteins for recovery and growth, not just swallowing the highest possible calorie count. The inclusion of MCT fats rounds out the nutritional profile in a way simpler gainers often skip. The promise of a palatable shake also means you’re more likely to stick with the routine. This is for the trainee who views a gainer as a serious part of a structured diet, not just a calorie-dense last resort.

The trade-off is that at 690 calories, it sits on the lower end for a dedicated mass gainer. If your sole metric is cramming in the most calories per scoop to break a plateau, you’ll find more brute force in options like Dymatize Super Mass Gainer at 1,280 calories. BSN True-Mass operates in a more moderate zone. It bets that quality protein sources and taste will win out over sheer volume for the lifter who still cares about what’s in the shake, not just the number on the scale.

Best for: The lifter seeking a mass gainer with a diverse, multi-source protein profile and a managed calorie increase per serving.

Product photos

#3Best High-Protein Gainer

Optimum Nutrition Pro Gainer Protein

Optimum Nutrition Pro Gainer Protein
Protein per serving60g
Calories per serving650
Carbohydrates per serving82g
Total sugar per serving5g
Package weight10.2 pounds
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What We Like

  • High 60g protein blend per serving
  • Substantial 650-calorie delivery
  • Modest 5g sugar content for a gainer
  • Large 10.2-pound container offers value

Trade-offs

  • Large container size demands ample storage space

A 650-calorie serving with 60 grams of protein positions this as a measured approach to gaining. It’s for the lifter who wants to add mass but isn’t trying to force-feed themselves into a caloric surplus that feels like a part-time job. The protein content is solid for supporting muscle, and the relatively modest sugar count suggests a formulation that avoids the pure candy-bar-in-a-shake approach of some bulk products. This is a gainer for someone who views their shake as a strategic part of their diet, not a caloric blitzkrieg.

Optimum Nutrition’s Pro Gainer delivers 650 calories per serving, which is a substantial increase for weight gain but about half the calorie load of a product like NAKED Mass Gainer at 1,360. This positions it as a more moderate option for adding mass. The 60 grams of protein per serving supports muscle growth, while the lower total avoids the extreme intake of the highest-calorie gainers. It provides a controlled way to increase caloric intake for those seeking steady progress.

Best for: The lifter seeking a substantial but not overwhelming calorie and protein boost to support lean mass gains. Not ideal for those requiring maximum caloric density for extreme weight gain.
#4Best Calorie-Dense Formula

Dymatize Super Mass Gainer Protein Powder

Dymatize Super Mass Gainer Protein Powder
Calories per serving1,280
Protein per serving52g
Carbohydrates per serving245g
Key inclusions1g creatine, 10.7g BCAAs
Protein blendWhey and casein
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What We Like

  • Extremely calorie-dense 1,280-calorie serving
  • Combines fast- and slow-digesting proteins
  • Includes creatine and 14 essential vitamins
  • Offers versatility for shakes and recipes

Trade-offs

  • Large 245g carbohydrate load per serving

A 1,280-calorie serving makes this one of the most concentrated calorie bombs on the shelf, designed for someone whose primary hurdle is simply getting enough energy in the door. It suits the individual who struggles to eat enough whole food and needs a single, efficient shake to massively boost their daily total. The inclusion of both whey and casein aims for a sustained protein release, while the added creatine and vitamins attempt to round out the support for training and recovery.

Each serving delivers 1,280 calories, a density that targets serious muscle gain but demands a high tolerance for volume. The formula includes 245 grams of carbohydrates to drive that calorie count, a load that can challenge some digestive systems. This approach differs from gainers like Transparent Labs, which uses a lower 110g carb blend for its calorie profile.

Best for: The individual with a fast metabolism and a clean bill of digestive health who needs maximum calories in minimum volume. Not ideal for those sensitive to high carbohydrate loads or seeking a product with a high number of servings per purchase.

Product photos

#5Best Whole Food Ingredients

Mutant Mass Weight Gainer Protein Powder

Mutant Mass Weight Gainer Protein Powder
Calories per serving1,100
Protein per serving56 g
Carbohydrates per serving192 g
Container size15 lb
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What We Like

  • High-calorie formula with 1,100 calories per serving
  • Blends multiple protein types and complex carbohydrates
  • Features whole food ingredients like sweet potato and oats
  • Large 15 lb container for regular, long-term use

Trade-offs

  • The 15 lb weight makes it cumbersome for travel or small kitchens
  • 15.0 pound weight makes it cumbersome for travel

Mutant Mass provides 1,100 calories and 56 grams of protein per serving, creating a substantial calorie surplus for weight gain. Its formula combines whey, casein, and 192 grams of carbohydrates from ingredients like rolled oats and sweet potato. This blend supports increased calorie and protein intake for active lifestyles.

The 15-pound container and the high serving volume require significant storage and mixing capacity. A product like Transparent Labs Mass Gainer lists 110 grams of carbohydrates per serving, offering a different macro profile. Mutant Mass delivers its formula in a larger total container size.

Best for: Active individuals requiring high-calorie and high-protein supplementation to support weight-gain goals.
#6Best High Carb-to-Protein Ratio

Rule 1 Proteins Mass Gainer

Rule 1 Proteins Mass Gainer
Calories per serving1,220+
Carbohydrates per serving250g+
Protein per serving40g all-whey
Carb-to-protein ratio6:1
Key ingredientCreatine monohydrate
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What We Like

  • Extremely high 6:1 carb-to-protein ratio.
  • Over 1,220 calories per serving for major surplus.
  • Includes creatine monohydrate for muscle support.
  • Manufactured in GMP-certified U.S. facilities.

Trade-offs

  • Large 2-scoop serving requires 18-20 oz liquid.

A 6:1 carb-to-protein ratio is the central feature here, making this formula a blunt instrument for calorie loading. With over 1,220 calories and 250 grams of carbohydrates per serving, it’s engineered for someone whose primary struggle is simply eating enough to trigger weight gain. The inclusion of creatine monohydrate and a blend of three whey proteins provides a foundation for muscle support, but the macro breakdown is unequivocally tilted toward fueling mass through sheer caloric density.

With 1,220 calories and a 6:1 carb-to-protein ratio, this formula prioritizes a massive influx of energy over raw protein. It delivers 40 grams of whey protein per serving, a figure that falls below the 60 grams offered by Optimum Nutrition’s Pro Gainer. For a buyer, that means it’s engineered for the hardgainer struggling to meet extreme calorie needs, rather than focusing primarily on maximizing protein intake from each shake.

Best for: The dedicated hardgainer who can't stomach enough food and needs a high-carb, high-calorie shock to their system. Not ideal for those prioritizing maximum protein per serving.

Product photos

#7Best Vitamin & Mineral Support

BOOST Very High Calorie Nutritional Drink

BOOST Very High Calorie Nutritional Drink
Calories per serving530 calories
Protein per serving22 g protein
Key nutrients26 vitamins & minerals
Package size24-pack, 8 fl oz each
Package weight12.0 pounds
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What We Like

  • High 530-calorie count for weight gain support
  • Includes 26 vitamins and minerals for nutritional support
  • Ready-to-drink, convenient liquid format
  • 22 g of protein helps maintain muscle mass

Trade-offs

  • Only 8 fl oz per serving, requiring more volume for higher calories
  • Less customizable than a powder you mix yourself

With 530 calories in an 8-ounce bottle, this drink provides a dense, complete nutritional boost without any mixing or measuring. It suits someone looking for convenient, balanced weight gain support, particularly if swallowing pills or mixing powders is a barrier. The inclusion of 26 vitamins and minerals means you are not just adding empty calories. This aligns with the expert view that eating nutritious foods is considered the best approach to boost calorie intake.

This option’s main limitation is its form factor. Compared to a powder like Optimum Nutrition Pro Gainer, you’re dealing with a heavy, bulky case of pre-mixed liquid. You get less control over concentration and flavor, and you’ll run out of physical storage space faster. For someone needing to pack in thousands of calories daily, this might mean drinking several bottles. That can be less efficient and more expensive per calorie than a mass gainer powder you can tailor to your needs.

Best for: Individuals seeking a convenient, nutritionally complete liquid for weight gain support. Not ideal for those who prioritize minimal storage space or prefer to tailor their drink's concentration.
#8Best Clean Formula with Creatine

Transparent Labs Mass Gainer Protein Powder

Transparent Labs Mass Gainer Protein Powder
Calories per serving770 calories
Protein per serving53g grass-fed whey
Carbohydrates per serving110g+ complex carbs
Creatine per serving3g creatine monohydrate
Third-party testedCertificate of Analysis available
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What We Like

  • Clean formula without artificial fillers
  • Clinically dosed creatine for strength
  • Slow-digesting carbs from whole food sources
  • Third-party purity and quality assurance

Trade-offs

  • 770 calories per serving is modest for extreme mass goals

A 770-calorie serving built from oat flour and sweet potato powder means you’re getting a nutrient-dense surplus from recognizable ingredients, not just table sugar. This is the pick for someone aiming to add lean mass and who values a transparent label as much as the calories. The inclusion of 3 grams of creatine monohydrate turns each shake into a practical performance aid, supporting the strength gains needed to justify the extra intake.

With 770 calories per serving, this mass gainer offers a more conservative calorie surplus compared to bulk-focused options like Optimum Nutrition Serious Mass, which can contain over a thousand. This positions it for those seeking controlled weight gain, where the calories come from nutrient-dense sources like oat flour and sweet potato powder to support lean mass goals rather than just scale weight.

Best for: The disciplined builder seeking a clean, performance-oriented calorie surplus. Not ideal for those needing an ultra-high-calorie solution for rapid weight gain.
#9Best Fortified Formula

ALLMAX QUICKMASS Gainer Powder

ALLMAX QUICKMASS Gainer Powder
Calories per serving1,010
Protein per serving64g
Carb-to-protein ratio3:1
Added micronutrients20 vitamins & minerals
Container size3.5 lb
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What We Like

  • High 1,010-calorie formula for mass gain
  • Includes 20 added vitamins and minerals
  • Slow-release carb blend for sustained energy
  • Clinically studied for fat-free mass gains

Trade-offs

  • At 3.5 lb, container size is smaller than most competitors
  • 3.5 lb container is smaller than most competitors

With 1,010 calories and 64 grams of protein per serving, ALLMAX QUICKMASS is built for a significant calorie surplus, which is the fundamental requirement for adding mass. It suits the trainee who wants that surplus heavily fortified, as the formula includes 20 vitamins and minerals, aiming to cover nutritional gaps during intense bulking phases. The ‘clean-carb’ blend of slow-digesting sources like sweet potato and oats is designed to provide steady fuel, avoiding the sugar crash that can come from simpler formulas.

Its main limitation is the total volume. The 3.5 lb container is modest compared to bulkier options like Mutant Mass or Optimum Nutrition Pro Gainer. For someone prioritizing a comprehensive micronutrient profile within their gainer, this is a logical, mid-range choice. For the sheer economics of calories per dollar in a single purchase, larger containers from other brands might be more practical.

Best for: Athletes seeking a vitamin-fortified mass gainer with clinically studied parameters for lean mass.

Product photos

#10Best Customizable Shake

Optimum Nutrition Serious Mass Gainer

Optimum Nutrition Serious Mass Gainer
Calories per servingOver 1,200
Protein per serving50 grams
Carbohydrates per servingOver 250 grams
Essential vitamins & minerals20+ included
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What We Like

  • High-calorie formula supports significant weight gain
  • Blended protein aids muscle repair and lean mass
  • Carbohydrate load fuels workouts and daily energy
  • Customizable shake base for tailoring calorie intake

Trade-offs

  • High carbohydrate count may not suit low-carb dieters

The single most decisive fact here is the over 1,200 calories per serving, which means it’s designed for those struggling to meet extreme daily caloric targets through food alone. This product suits anyone in an aggressive bulking phase who needs a reliable, high-energy foundation shake. Its real strength is the explicit invitation to blend in milk, peanut butter, or fruits, turning a standard mix into a highly personalized calorie bomb that can be adjusted as goals change.

The main challenge is committing to a very large, carbohydrate-dense shake, which can be overwhelming if your appetite is already challenged. Compared to something like the Transparent Labs Mass Gainer, which lists 110g of carbs, this formula is far more focused on sheer caloric surplus than a balanced macronutrient profile. It’s a tool for one job: packing on mass efficiently, with the understanding that you’ll likely need to customize the taste and texture to make it palatable day after day.

Best for: Athletes and individuals in an intense mass-gaining phase who need a high-calorie base shake they can customize with other ingredients. Not ideal for those seeking a lean gain, a low-carb approach, or a simple, ready-to-drink formula.

How We Evaluated Vitamins To Become Fat

Our evaluation was research-based. We analyzed product specifications, manufacturer documentation, and expert round-ups from nutrition and fitness sources. We focused on criteria critical for effective weight gain, like calorie count per serving to ensure a sufficient surplus. We also considered protein quality and quantity to support lean mass, plus the presence of supportive nutrients like vitamins, minerals, and creatine. Practical factors such as formula cleanliness and serving size convenience were also part of the review.

A key limitation of this approach is that individual digestive tolerance or taste preferences cannot be verified. The assessment relies on reported ingredient profiles and patterns in expert recommendations. Products were prioritized based on their alignment with established principles for healthy weight gain, such as supporting a calorie surplus and muscle synthesis.

What To Look For In Vitamins To Become Fat

Choosing the right supplement involves more than just picking the highest calorie count. You need a product that fits your dietary tolerance, supports your overall health, and helps you meet your specific mass-gaining goals efficiently.

Look for a high calorie count per serving and a quality protein source like whey, casein, or plant-based options. Also, consider added nutrients like vitamins, minerals, or creatine to support overall health and muscle growth during a weight gain phase.

Calorie Density

The primary goal is to achieve a consistent calorie surplus. Mass gainers provide this efficiently, with servings ranging from around 530 to over 1,360 calories. A higher calorie count per scoop or serving means you need to consume less volume, which is crucial if you have a small appetite or fast metabolism. However, extremely dense formulas often come with a high carbohydrate load, which some may find difficult to digest. Consider starting with a moderate-calorie option if you are new to supplementation.

Protein Source & Quantity

Protein is essential for building lean muscle mass, not just fat. Look for products offering between 20g to 60g of protein per serving. Multi-source protein blends (combining whey, casein, and egg) provide both fast- and slow-digesting amino acids, supporting muscle repair over several hours. For those with dietary restrictions, plant-based options exist but are less common in this category. Adequate protein intake ensures a greater portion of your weight gain is muscle, especially when combined with resistance training.

Supporting Nutrients

Many mass gainers include added vitamins and minerals to address potential micronutrient deficiencies that can accompany a high-calorie but nutritionally poor diet. Some also add creatine monohydrate, which is clinically shown to support strength and muscle gains. A clean formula without artificial sweeteners or fillers may be better for long-term use. For those focused purely on performance, a product with clinically dosed creatine can be a smart choice.

  • Check the sugar content, as some gainers use large amounts for calories.
  • Review the carbohydrate source; complex carbs like oats digest more slowly.
  • Note the serving size and required liquid volume for mixability.
  • Look for third-party certifications (NSF, Informed Choice) for purity assurance.
  • Consider container size and storage space, as some are very large.

The best product for you balances a manageable calorie increase with protein you can tolerate and any extra nutrients your diet requires.

Vitamins To Become Fat Compared

The table below compares key specifications across our top picks to help you see the differences at a glance.

ProductCalories per servingProtein per servingKey inclusions
NAKED Mass Gainer Protein Powder1,36050gWhey, casein, organic maltodextrin
BSN True-Mass Weight Gainer Protein Powder69050gMedium chain triglycerides (MCT) FATS
Optimum Nutrition Pro Gainer Protein65060gN/A
Dymatize Super Mass Gainer Protein Powder1,28052g1g creatine, 10.7g BCAAs
Mutant Mass Weight Gainer Protein Powder1,10056 gEAA & BCAA SUPPORT
Rule 1 Proteins Mass Gainer1,220+40g all-wheyCreatine monohydrate
BOOST Very High Calorie Nutritional Drink530 calories22 g protein26 vitamins & minerals
Transparent Labs Mass Gainer Protein Powder770 calories53g grass-fed whey3g creatine monohydrate
ALLMAX QUICKMASS Gainer Powder1,01064g20 vitamins & minerals
Optimum Nutrition Serious Mass GainerOver 1,20050 grams20+ included

Frequently Asked Questions

Which vitamins help to gain weight?

No vitamin directly causes fat storage. However, deficiencies in certain nutrients like vitamin B1 (thiamine), zinc, and iron can suppress appetite, making it harder to eat enough. Correcting these deficiencies through diet or a fortified supplement may help normalize appetite, supporting your ability to consume the calorie surplus needed for weight gain. A product like BOOST Very High Calorie Nutritional Drink includes 26 vitamins and minerals for this nutritional support.

How can I gain 20 pounds fast?

Gaining weight quickly requires a significant and consistent calorie surplus, primarily from energy-dense foods and supplements. Incorporate a high-calorie mass gainer shake daily, focus on calorie-dense whole foods like nuts, dried fruit, and healthy fats, and engage in resistance training to direct calories toward muscle growth. A product like Dymatize Super Mass Gainer, with 1,280 calories per serving, is formulated for this purpose, but such an aggressive approach should be undertaken with attention to overall nutrition.

What pills can gain weight?

There are no magic pills for weight gain. Some supplements, like the amino acid compound creatine, can help increase intramuscular water weight and support strength gains, potentially leading to increased muscle mass over time. Appetite stimulants are prescription-only and address medical conditions causing weight loss. For most people, the safest “pill” alternative is a high-quality mass gainer powder or a calorie-dense nutritional drink like BOOST, which provides substantial calories and protein in a convenient format.

Will B12 help me gain weight?

Vitamin B12 alone is not a weight-gain supplement. It plays a crucial role in energy production and red blood cell formation. If a diagnosed B12 deficiency is causing fatigue and reduced appetite, correcting it may help improve your energy levels, potentially allowing you to be more active and eat more. However, for healthy individuals, supplementing with extra B12 will not lead to weight gain. It’s more effective to focus on overall calorie intake and consider vitamins for energy as part of a broader health strategy.

Is it safe to use mass gainers?

Mass gainers are generally safe for healthy adults when used as directed to supplement a balanced diet. Choose products with transparent ingredient lists and third-party quality certifications to ensure purity. The main considerations are the high carbohydrate and calorie content, which may not be suitable for individuals with certain metabolic conditions like diabetes. It’s always wise to consult with a healthcare provider before starting any new supplement regimen, especially if you have underlying health concerns.

The Bottom Line

For most people seeking to gain weight, the NAKED Mass Gainer Protein Powder is the best overall choice. It provides an exceptionally high calorie count from a clean, simple formula, making it a reliable foundation for a bulking diet. If your budget is a concern or you need a product with extensive vitamin fortification, look to the BOOST Very High Calorie Nutritional Drink for a convenient, nutritionally complete option.

Ultimately, the most important factor is consistent calorie surplus. The best supplement is the one you can tolerate daily and that helps you reliably meet your increased calorie and protein needs without digestive discomfort. Pairing your chosen product with a solid diet and resistance training will yield the best, most sustainable results.