Best Mass Gainers For Clean Bulking & Muscle Mass (Tested 2025)

These mass gainers are great for all your clean bulking needs and provide quality carbs for increased muscle mass.

For most looking to increase muscle mass, many will turn to supplements as an aid. One of the most popular supplements include high protein mass gainers, which can help with our clean bulking needs by pumping us with clean carbs. Seeking a real increase in our strength and size can be challenging and often times it is the fine line between the right diet, most effective training plan, and top tier supplements. But with a mass gainer, you allow yourself to meet your desired caloric intake while also giving your body the fuel it needs to really power itself through the day.

The right ratio of macronutrients and other added ingredients, paired with a quality company who cares about their consumers and the needs of athletes, all your clean bulking needs can be met with a high-quality mass gainer. The high-calorie content is good for those who want to achieve a calorie surplus, but too high of a surplus will result in fat gain and not additional muscle mass.

We’ve put together a list of the Best Mass Gainers for 2025 so you can achieve the clean muscle mass and weight gain you want most. Reflective of the quality nutrients you deserve to have, these mass gaining supplements are proven to contain the cleanest carbs and highest quality protein to give you the desired results for your overall health and performance.

Best Mass Gainers 2025

• Best Mass Gainer Overall: Nutricost Mass Gainer
• Best Premium Mass Gainer: Transparent Labs ProteinSeries Mass Gainer
  
• Best For High Protein: MUTANT MASS
• Best All-Natural: Naked Nutrition Naked Mass Weight Gainer
• Best Mass Gainer For Digestion: Transparent Labs ProteinSeries Mass Gainer
  
• Best Clean Protein-Carb Blend: MUTANT MASS

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Best Mass Gainer Overall

You want your mass gainer to be the best possible option, something that has great macros, great ingredients, and does not break the bank.

Nutricost Mass Gainer

Calories	1,240
Protein	50g
Carbs	250g
Fat	12g
Sugar	6g
Flavors	Peanut butter, cookies and cream,
Best Way To Take	Mix 3 scoops with 6-8 oz. of cold water or your desired beverage.

Pros

• No junk ingredients
• Can be taken in 2 or 3 scoops
• Fully disclosed supplement facts panel
• BCAAs included

Cons

• Limited flavor option

Price: $44.95

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Best Premium Mass Gainer

You want your mass gainer to be of the utmost quality and a premium mass gainer will stand out amongst its counterparts, especially as a natural mass gainer. Looking at ingredients and the formula, as well as the reputation of the company and price, will prove to be very important overall moving forward.

Transparent Labs ProteinSeries Mass Gainer

Calories	790
Protein	53g
Carbs	114g
Fat	14g
Sugar	17g
Flavors	Chocolate, Cookies ‘N Cream (Not Gluten Free), Sweet Vanilla, Chocolate Glaze
Best Way To Take	Mix with milk or water.

Transparent Labs Mass Gainer is loaded with essentials to give you serious growth and better overall health and wellness. Designed to enhance lean muscle growth and athletic performance, this is a safe and effective way to pack on muscle and healthy weight. With 750 calories for a two scoop serving size, this mass gainer is loaded with 53 grams of protein per serving making it ideal for increasing lean muscle mass, and taking in a lot of calories. With no artificial sweeteners, food dyes, or harmful additives, this product is transparent with its label and ensures the use of high quality ingredients, making it great for pairing with whey protein or other protein drinks so you feel full while getting the right protein content with this powder for recovery and a well-balanced diet.

Pros

• Great for lean muscle growth
• Perfect for a meal replacement or paired with a grass fed whey protein supplement
• Great ingredients and no artificial additives for a transparent label
• From a reputable company in Transparent Labs

Cons

• A premium priced option only available directly through their site

Price: $65.00

Use the promo code GENIRON10 for 10% off!

Read our full review of review for Transparent Labs ProteinSeries Mass Gainer!

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Best Mass Gainer For High Protein

A supplement high in protein is exactly what you want and while most mass gainers have done a nice job of properly dosing their macros, those that prioritize protein can greatly affect your health and performance. With protein being essential for muscle growth and recovery, it would be a disservice to neglect a great high protein, natural mass gainer that supports muscle recovery.

MUTANT MASS

Calories	1,100
Protein	56g
Carbs	192g
Fat	12g
Sugar	18g
Flavors	Triple Chocolate, Vanilla Ice Cream, Cookies & Cream, Strawberry Banana, Coconut Cream, and Chocolate Fudge Brownie.
Best Way To Take	Mix 4 scoop with 6-8 oz. of cold water or your desired beverage.

Making the list again is MUTANT MASS, which is known for its high protein content. As stated above, it is designed specifically for the strongest bodybuilders and weightlifters that walk the earth, meaning that they understand the importance of protein and really pack it in. MUTANT MASS packs 56 grams of whey protein isolate, concentrate, and casein, packed into each serving, which is incredible.

Pros

• No junk ingredients
• Can be taken in 2 or 4 scoops
• Fully disclosed supplement facts panel
• BCAAs
• Added digestive enzymes

Cons

• Premium priced product
• only one flavor option

Price: $44.99

Read our full review of review for MUTANT MASS.

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Best All-Natural Mass Gainer

You want a product that is safe and effective and having something that is all natural will prove to be the best decision for you. Too often do companies put added substances and fillers that just aren’t necessary, and some companies have even been caught putting anabolics and banned substances in their products. A 100% all-natural option will give you all the benefits of a great natural mass gainer and much more.

Naked Nutrition Naked Mass Weight Gainer

Calories	1250
Protein	50g
Carbs	252g
Fat	2.5
Sugar	5g
Flavors	Unflavored Gainer, Unflavored Vegan Gainer, Chocolate Gainer, Chocolate Vegan Gainer, Vanilla Gainer, Vanilla Vegan Gainer
Best Way To Take	Mix four scoops with 24 oz. of milk or your favorite beverage.

Naked Nutrition Naked Mass Gainer is the ultimate muscle building and weight gaining supplement perfect for your clean bulking needs. The perfect blend of fast and slow absorbed proteins and complex carbohydrates, each serving is 1,250 calories with 50g of high quality protein and 252g of clean carbs. Able to help fuel your workouts, meet your daily calorie requirement, and build and sustain muscle mass, this is an honest product to help boost your mass gain. With Naked Nutrition Naked Mass Gainer, you can easily get in extra calories for muscle building.

Pros

• Great blend of fast and slow absorbed protein and complex, clean carbs
• Perfect for muscle building and weight gaining
• Only three ingredients
• From a reputable company in Naked Nutrition

Cons

• Premium priced option
• Four scoops is a big serving size

Price: $64.99

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Best Mass Gainer For Digestion

With so much protein and carbs included in a mass gainer, you want to make sure this doesn’t hinder digestion. With added ingredients or a clean source of both, you can be sure your digestive needs are met so your body absorbs these nutrients as effectively as possible.

Transparent Labs ProteinSeries Mass Gainer

Calories	790
Protein	53g
Carbs	114g
Fat	14g
Sugar	17g
Flavors	Chocolate, Cookies ‘N Cream (Not Gluten Free), Sweet Vanilla, Chocolate Glaze
Best Way To Take	Mix with milk or water.

Transparent Labs Mass Gainer is loaded with quality ingredients to give you serious growth and better overall health and wellness. Designed to enhance lean muscle growth and athletic performance, this is a safe and effective way to pack on muscle and healthy weight. With 750 calories for a two scoop serving size, this mass gainer is loaded with 53 grams of protein per serving. With no artificial sweeteners, food dyes, or harmful additives, this product is transparent with its label and high quality with ingredients great for pairing with whey protein or other protein drinks so you feel full while getting the right protein content with this natural mass gainer for recovery and a well-balanced diet.

Pros

• Great for lean muscle growth and clean bulking
• Perfect for a meal replacement or paired with a grass fed whey protein supplement
• Great ingredients and no artificial additives for a transparent label
• From a reputable company in Transparent Labs

Cons

• A premium priced option only available directly through their site

Price: $65.00

Use the promo code GENIRON10 for 10% off!

Read our full review of review for Transparent Labs ProteinSeries Mass Gainer!

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Best Clean Protein-Carb Blend

A mass gainer needs to have the right balance of protein to carbs in order to fuel recovery and boost muscle growth. But this blend must be made from only the cleanest sources so you don’t compromise any gains with added substances you don’t want or need, especially with a natural mass gainer.

MUTANT MASS

Calories	1,100
Protein	56g
Carbs	192g
Fat	12g
Sugar	18g
Flavors	Triple Chocolate, Vanilla Ice Cream, Cookies & Cream, Strawberry Banana, Coconut Cream, and Chocolate Fudge Brownie.
Best Way To Take	Mix 4 scoop with 6-8 oz. of cold water or your desired beverage.

Making the list a third and final time is MUTANT MASS, as this has a great blend of protein and carbs. When it comes to protein, there are 56 grams whey isolate, concentrate, and casein packed in to each serving. As far as carbs, each serving of MUTANT MASS contains a 192g blend of carbohydrate sources that includes sweet potato, rolled oats, barley, waxy maize, and calcium, so the sources are all clean.

Pros

• No junk ingredients
• Can be taken in 2 or 4 scoops
• Fully disclosed supplement facts panel
• BCAAs
• Added digestive enzymes

Cons

• Premium priced product
• only one flavor option

Price: $44.99

Read our full review of review for MUTANT MASS.

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Benefits Of Mass Gainers

When it comes to mass gainers, you are looking for a supplement that will work to increase muscle mass while meeting all of your clean bulking needs. It is important to know the benefits of a mass gainer as you seek to build serious strength and size to boost your overall health and performance. Benefits of a mass gainer include:

• Boost muscle growth and recovery: With the right ratio of protein, carbs, and fat, you can boost your muscle growth and recovery so all your clean bulking needs are met (1).
• Meet caloric requirements: For those who need to focus on their caloric intake and really get enough into their body, a mass gainer can pump you with clean carbs and protein so you hit whatever number of calories you want (2).
• Helps keep you lean: With good fats and an all-star formula, a mass gainer can help keep you lean as you build muscle.
• Good source of fiber: A mass gainer will typically be a good source of fiber to help with digestion and allow your body to absorb those nutrients much faster (3).

How Many Servings You Should Take

This depends on how many calories you need to consume to gain weight at a rate of a few pounds per month. But then your genetics and training will also determine how much “good” weight you’ll gain. So, there’s no universal answer to this question. However, you should only use a mass gainer to fill in what you cannot get from a primarily whole food diet. And if you need to track your macros then you’ll have to do so accordingly by measuring the serving sizes.

Protein, Carbs & Fats Requirements for Mass Gainers

The amount you need will depend on your body weight, activity levels, and age. But generally, 1.6-2.2kg/day is an ideal range for muscle hypertrophy (4). To build muscle, you should be getting sufficient amounts per each meal. And many weight gainers supply rather high amounts so splitting servings is a good idea in many instances.

For size gains, carbs should be on the higher end to replenish lost glycogen, again, if you’re not following a keto diet (high fat, low carbs). But fat is necessary as an energy source as well. Carbs should usually make up half of your daily caloric intake and fat 20-35 percent with protein taking up the remaining percentage.

When To Take Mass Gainers

You can have a serving any time of the day, but according to research, the best time to consume a whey protein is within three hours following resistance training. The reason is that anabolism is increased within this time frame (peak of 45-90 minutes) and muscle protein synthesis drops back down to baseline levels past the three-hour window (5).

But carbohydrates like maltodextrin (added to many mass gainers mentioned) and glucose are also necessary in combination with protein to maximize this process. And essential amino acids which are naturally occurring in most whey protein supplements are also very necessary for optimum protein synthesis.

Are Mass Gainers Safe to Consume?

The ingredients in these mass gainers are safe for most users. But some products contain artificial ingredients, dairy, added sugars, and additional ingredients which some people have sensitivities to. So, people with blood sugar issues or sensitivities to certain foods should definitely be careful to read the labels before consuming any nutritional supplements.

Now, many supplements have added sweeteners like sucralose and acesulfame potassium but these are actually considered safe for daily consumption according to the most recent research on the substances.

How We Choose The Best Mass Gainers

When looking at the best mass gainers, we look first at the reputation of the brand and the product. A good brand will be honest and transparent with their label to ensure your overall health and performance goals are met. We look at included ingredients and the formula because that is what makes up the product. The formula and subsequent ingredients should be clean and ideally sourced naturally to ensure it works to optimize all of your needs. Lastly, we look at price. We know supplements can get expensive and we look for those that will get the job done right while still being affordable.

FAQ Section

What is the best mass gainer?

Nutricost Mass Gainer. This mass gainer is loaded with essentials to give you serious growth and better overall health and wellness. Designed to enhance lean muscle growth and athletic performance, this is a safe and effective way to pack on muscle and healthy weight for your clean bulking needs.

Are mass gainers safe?

Mass gainers on the whole are generally safe to use. Always be sure to read the label before using to make sure the product will suit your needs and is the right supplement for you.

What should I look for in a mass gainer?

When looking at mass gainers, you should look for the amount of protein and carbs, as well as other added ingredients. Serving size and amount is important because you want to make sure you are getting enough for the price. Also, look at taste and the reputation of the brand because you deserve to have the best companies working for you and the product should taste good.

Mass Gainers Wrap Up

Mass gainers have the potential to really increase strength and size in an effective and healthy way. By offering a great source of carbs and protein, you ensure you get the most out your caloric intake to still be healthy while also aiding in training and performance. Incorporating a regular resistance training regimen can further enhance the benefits of mass gainers, helping you gain lean body mass. The way you look and feel matters and a mass gainer is a great supplement for those looking to bulk or put on healthy weight so all your goals are met. To pick the best mass gainer for you, look for a product that contains enough calories to help you gain weight and build muscle mass. Many mass gainers contain about 800 to 1,300 calories per serving, some even include nearly 250 grams of carbohydrates.

Check out this list of the best mass gainers to find a great mass gaining supplement suitable for all your clean bulking needs.

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References

1. Pasiakos, Stefan M.; McLellan, Tom M.; Lieberman, Harris R. (2015). “The effects of protein supplements on muscle mass, strength, and aerobic and anaerobic power in healthy adults: a systematic review”. (source)
2. Howell, Scott; Kones, Richard (2017). “‘Calories in, calories out’ and macronutrient intake: the hope, hype, and science of calories”. (source)
3. Slavin, Joanne L. (2005). “Dietary fiber and body weight”. (source)
4. Schoenfeld, Brad J.; Aragon, Alan A. (2018). “How much protein can the body use in a single meal for muscle-building? Implications for daily protein distribution”. (source)
5. Stark, Matthew; Lukaszuk, Judith; Prawitz, Aimee; Salacinski, Amanda (2012). “Protein timing and its effects on muscular hypertrophy and strength in individuals engaged in weight-training”. (source)