Though weight loss is a goal for many people, others hope to gain weight, often to look and feel more muscular or to improve athletic performance.

Regardless of your reason, the most critical component of gaining weight is consuming more calories than you burn on a daily basis.

For people who struggle to eat enough to gain weight, mass gainer supplements are an effective way to increase your calorie intake.

Unlike typical protein supplements, mass gainers are not only rich in protein but also carbs and sometimes other ingredients like amino acids.

Here are the 10 best weight and mass gainer supplements.

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If you want to gain muscle but are worried about gaining fat too, you may want to consider a mass gainer that has fewer than 1,000 calories per serving.

Here are the top 5 mass gainers with fewer than 1,000 calories per serving — listed from lowest to highest calories.

1. Universal Real Gains Weight Gainer

Universal Nutrition has been producing muscle gain supplements for years.

Their weight gainer supplement delivers over 50 grams of high-quality protein per serving but is lower in calories than many products — with only 600 calories per serving.

Along with the relatively low calorie content, this product is lower in carbs than most products — with fewer than 100 grams of carbs per serving.

Here are the supplement facts for one serving (155 grams):

  • Calories: 601
  • Protein: 52 grams
  • Protein source: Whey and casein (dairy proteins)
  • Carbs: 87 grams
  • Fat: 5 grams
  • Largest size available: 10.6 pounds (4.8 kg)
  • Flavors available: Vanilla Ice Cream, Banana
  • Approximate price per serving: $1.73
  • Where to buy: Amazon.com

2. Optimum Nutrition Pro Gainer

Optimum Nutrition produces an award-winning line of supplements that are typically highly rated by consumers.

Their mass gainer supplement contains a whopping 60 grams of dairy and egg protein — both of which are considered high-quality proteins (1).

Similar to the previous product, Optimum Nutrition Pro Gainer is one of the lower-calorie and lower-carb mass gainers.

Here’s the lowdown on one serving (165 grams):

  • Calories: 650
  • Protein: 60 grams
  • Protein source: Whey, casein, egg
  • Carbs: 85 grams
  • Fat: 8 grams
  • Largest size available: 10 pounds (4.5 kg)
  • Flavors available: Double Rich Chocolate, Banana
  • Approximate price per serving: $2.46
  • Where to buy: Amazon.com

3. MuscleMeds Carnivor Mass

While the majority of protein supplements rely on dairy proteins like whey or casein, MuscleMeds Carnivor Mass uses protein isolated from beef.

Not only is the protein source of this product unique, but it also contains five grams of added creatine monohydrate.

Creatine is known to be one of the most effective supplements for improving muscular strength and power (2).

Creatine monohydrate is relatively inexpensive on its own, but those who want both a mass gainer and creatine may find a combined supplement like this convenient.

Here are the supplement facts for one serving (192 grams):

  • Calories: 720
  • Protein: 50 grams
  • Protein source: Beef
  • Carbs: 125 grams
  • Fat: 2 grams
  • Largest size available: 10.5 pounds (5.8 kg)
  • Flavors available: Vanilla Caramel, Chocolate Fudge, Chocolate Peanut Butter, Strawberry
  • Approximate price per serving: $2.32
  • Where to buy: Amazon.com

4. MuscleTech Mass Tech

MuscleTech Mass Tech is another product that contains more than just protein and carbs.

This product provides 10 grams of creatine monohydrate per serving, as well as added branched-chain amino acids.

The supplement facts for one serving (230 grams) is as follows:

  • Calories: 840
  • Protein: 63 grams
  • Protein source: Whey, casein
  • Carbs: 132 grams
  • Fat: 7 grams
  • Largest size available: 7 pounds (3.2 kg)
  • Flavors available: Vanilla, Chocolate, Birthday Cake
  • Approximate price per serving: $2.91
  • Where to buy: Amazon.com

5. Bodybuilding.com Signature Mass Gainer

At nearly 70 grams per serving, the Bodybuilding.com Signature Mass Gainer is one of the higher-protein products on the market.

These proteins are a blend of the fast- and slow-digesting dairy proteins (whey and casein), as well as egg protein.

In one serving (211 grams), you’ll find:

  • Calories: 810
  • Protein: 67 grams
  • Protein source: Whey, casein, egg
  • Carbs: 110 grams
  • Fat: 10 grams
  • Largest size available: 10 pounds (4.5 kg)
  • Flavors available: Vanilla, Chocolate
  • Approximate price per serving: $3.05
  • Where to buy: Amazon.com
Summary Although all mass gainers are relatively high-calorie, several products contain fewer than 1,000 calories per serving. These products typically provide 50–70 grams of protein and around 85–130 grams of carbs per serving.

If you have a tough time gaining weight and are considering a mass gainer supplement, you might want a higher-calorie option.

However, it’s important to realize that higher calorie content in mass gainers is typically due to extra carbs.

While carbs are an important energy source for intense exercise, they won’t cause you to gain muscle on their own (3, 4).

Nonetheless, higher-carb products could be beneficial for highly active individuals who struggle to gain weight.

Here are the top 5 mass gainers that boast over 1,000 calories per serving — listed from lowest to highest calories.

6. BSN True Mass 1200

BSN is a well-known supplement line with a hearty 1,200-calorie-per-serving mass gainer that provides over 200 grams of carbs per serving.

Here are the supplement facts for one serving (310 grams):

  • Calories: 1,210
  • Protein: 50 grams
  • Protein source: Whey, casein, egg
  • Carbs: 213 grams
  • Fat: 17 grams
  • Largest size available: 10.4 pounds (4.7 kg)
  • Flavors available: Strawberry Milkshake, Chocolate Milkshake, Cookies & Cream
  • Approximate price per serving: $3.12
  • Where to buy: Amazon.com

7. Optimum Nutrition Serious Mass

Optimum Nutrition’s Serious Mass product has almost twice the calories per serving compared to its lower-calorie counterpart (#2 on this list).

As with nearly all mass gainers, the calories come primarily from carbs — and this product has over 250 grams per serving.

Here are the facts on one serving (334 grams):

  • Calories: 1,250
  • Protein: 50 grams
  • Protein source: Whey, casein, egg
  • Carbs: 252 grams
  • Fat: 4.5 grams
  • Largest size available: 12 pounds (5.4 kg)
  • Flavors available: Chocolate, Banana, Chocolate Peanut Butter
  • Approximate price per serving: $2.71
  • Where to buy: Amazon.com

8. Evlution Nutrition Stacked Protein Gainer

Most mass gainers contain several types of protein, such as casein and whey. Though both casein and whey come from dairy, they’re digested much differently (5).

Evlution Nutrition Stacked Protein Gainer contains only whey — the faster-digesting protein.

While this doesn’t necessarily make this supplement’s formulations stronger or weaker, it’s one notable way this product differs from others listed in this article.

Here’s some more information for each 328-gram serving:

  • Calories: 1,250
  • Protein: 50 grams
  • Protein source: Whey
  • Carbs: 250 grams
  • Fat: 6 grams
  • Largest size available: 12 pounds (5.4 kg)
  • Flavors available: Vanilla Ice Cream, Chocolate
  • Approximate price per serving: $2.94
  • Where to buy: Amazon.com

9. MusclePharm Combat XL

Although MusclePharm Combat XL has a similar formulation to other mass gainers, it has the advantage of being independently tested for banned ingredients.

This product has the Informed-Choice seal of approval, meaning that both the manufacturing process for the supplement and its actual contents have been tested.

Due to the time and expense involved, many companies choose not to undergo this assessment.

However, testing for banned substances can help ensure a safe supplement and may be especially important if you are a competitive athlete who could be subjected to drug testing.

Here are some other facts for one serving (332 grams) of this supplement:

  • Calories: 1,270
  • Protein: 50 grams
  • Protein source: Whey, casein
  • Carbs: 252 grams
  • Fat: 7 grams
  • Largest size available: 12 pounds (5.4 kg)
  • Flavors available: Vanilla, Chocolate Milk, Chocolate Peanut Butter
  • Approximate price per serving: $3.50
  • Where to buy: Amazon.com

10. Dymatize Super Mass Gainer

Similar to the previous mass gainer, Dymatize Super Mass Gainer has the advantage of having the Informed-Choice seal of approval.

It also contains 1 gram of creatine monohydrate per serving.

However, this dose may be lower than needed for maximum benefits, so you may want to supplement with additional creatine (2).

In one serving (333 grams), you’ll find:

  • Calories: 1,280
  • Protein: 52 grams
  • Protein source: Whey, casein, egg
  • Carbs: 246 grams
  • Fat: 9 grams
  • Largest size available: 12 pounds (5.4 kg)
  • Flavors available: Gourmet Vanilla, Chocolate Cake Batter, Cookies & Cream
  • Approximate price per serving: $2.82
  • Where to buy: Amazon.com
Summary Higher-calorie mass gainer supplements are often around 1,200 calories per serving or higher. These products typically contain around 50 grams of protein and 200–250 grams of carbs.

If you’re having trouble gaining weight, you’re probably not consuming enough calories.

Mass gainer supplements aren’t necessary if you can get enough calories from food, but some people consider them a convenient addition to a busy lifestyle.

Each product contains around 50–70 grams of protein, with varying amounts of carbs and calories.

Carb content ranges from around 85 to 250 grams and calories from 600 to over 1,200 per serving. Higher-calorie products usually contain more carbs.

When choosing a product, you may also want to consider a few other things, including the price per serving, the presence of other ingredients like creatine, available flavors and independent product testing.

While the items listed in this article are some of the most popular ones, there are many other mass gainers available.

The criteria used in this article can help you as you decide whether or not a particular mass gainer supplement is right for you.

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