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Top 5 Best Mass Gainers for Bulking

In a world where muscles reign supreme and fitness enthusiasts are on an endless pursuit to sculpt the perfect body, one drink has been making waves as the ultimate ally: the mass gainer protein shake

Picture this: a potion so powerful, so delicious, that it effortlessly transforms scrawny silhouettes into statuesque figures worthy of awe. 

Are you intrigued yet? 

Well, my fellow fitness aficionados, it’s time to pull up a seat, grab your shaker, and let me introduce you to the liquid magic that has become the talk of the gym – the best mass gainer protein shake. 

In this article, we’re going to reveal the ultimate mass gainer shake that’s not just a feast for your muscles but a delectable treat for your taste buds as well. So, let’s dive in and give you the scoop on the secret sauce that will help you bulk up like never before!

Medical Disclaimer: The content on this fitness website is provided for general informational purposes only and is not intended as, nor should it be considered a substitute for, professional medical advice, diagnosis, or treatment. Always consult with a qualified healthcare professional before starting or changing any exercise, diet, or wellness program, particularly if you are pregnant, nursing, have any pre-existing medical conditions, or are taking medications.

Bulk gainer powder in a measuring scoop

What Is A Mass Gainer?

A mass gainer protein shake is a nutritional supplement designed specifically to aid those striving to put on weight and increase muscle mass

This beverage typically consists of a rich blend of protein, carbohydrates, fats, vitamins, and minerals, making it a convenient and efficient way to consume additional calories. 

Popular amongst fitness enthusiasts and bodybuilders, mass gainer protein shakes serve as an effective means to support their muscle-building goals whilst catering to their busy schedules.

Not only do these scrumptious shakes provide a substantial amount of calories, but they also boast a variety of protein sources to help the body recover and build muscle after a strenuous workout. 

Moreover, they’re a piece of cake to whip up – simply add water or milk, and you’ve got yourself a tasty, nutrient-dense concoction that’s perfect for fuelling your gains.

So, if you’re looking to bulk up, this sumptuous elixir could be the key to unlocking your full muscle-building potential!

Top 5 Mass Gainers

1. Bulk – Informed Mass Gainer

Bulk™ Informed Mass Gainer is a top-of-the-line product, specifically crafted for professional athletes and serious trainers striving to pack on muscle and gain weight. 

At a reasonable £50, I found this exceptional supplement delivers a meticulously designed formula with an all-star cast of ingredients that cater to every aspect of muscle growth and recovery.

I must say, as someone who values transparency, I find it incredibly refreshing that Bulk™ lists every ingredient in detail and ensures their products are lab-tested and elite athlete approved. 

Their commitment to quality is evident, and the fact that they offer a money-back guarantee speaks volumes about their confidence in Informed Mass®.

What truly sets Informed Mass® apart from other mass gainers is its impressive composition. The mTOR Protein Complex™ is a splendid example, offering 45g of high-quality protein per serving, predominantly sourced from premium whey protein isolate. 

The inclusion of Ultra Fine Scottish Oats as the primary carbohydrate source adds credibility to the mix, providing slow-releasing energy and minimal sugar.

With added creatine monohydrate for improved high-intensity performance, HMB, and glutamine peptides, this mass gainer covers all bases.

I love the thoughtful addition of flaxseed powder and Medium Chain Triglycerides (MCTs) contributes healthy fats and fibre, rounding out the nutritional profile.

Moreover, the presence of DigeZyme® digestive enzymes and LactoSpore® probiotics demonstrate Bulk™’s commitment to not just muscle growth but also gut health and overall wellness. 

The comprehensive blend of ingredients in Informed Mass® ensures that users can confidently rely on a single supplement to support their muscle-building journey.

As a fitness enthusiast, I’m impressed by the well-rounded, powerful formula behind Informed Mass®. It’s evident that Bulk™ has gone to great lengths to ensure optimal results for those looking to bulk up in a clean and efficient manner. 

If you’re a serious trainer or an elite athlete seeking to put on muscle, Informed Mass® is undoubtedly a top-tier choice that’s worth every penny.

2. Warrior – Lean Mass Gainer

For those on a quest to build lean muscle mass, look no further than Warrior Lean MASS Gainer – an exceptional, battle-tested supplement that has earned its place among the elite. 

Priced at around £40, this cutting-edge formula is designed specifically to support remarkable gains in muscle mass for dedicated athletes such as MMA fighters, boxers, rugby players, or anyone who trains intensively with a burning desire to achieve REAL results.

As someone who has sampled a plethora of mass gainers, I must say, I am absolutely smitten with the Banana Creme flavour. This delightful concoction is not only a feast for the muscles but also a treat for the taste buds.

Warrior MASS provides over 1000 calories and up to 61g of protein per shake, making it perfect for post-workout recovery or as a nutritious meal replacement between meals. 

The blend comprises both Whey Protein Concentrate for an instant protein boost and Micellar Casein, which digests slowly over eight hours, creating a balanced protein profile.

The developers at Warrior MASS haven’t skimped on the quality of carbohydrates either, opting for a time-released blend of slow, low-GI Natural Ground Oats, Waxymaize, and Maltodextrin. 

This thoughtful combination aids the recovery of normal muscle function after intense and long-lasting physical exercise, resulting in muscle fatigue and depletion of glycogen stores in skeletal muscle.

In my personal opinion, Warrior Lean MASS Gainer is the go-to supplement for anyone serious about packing on lean muscle and pushing their athletic performance to new heights.

With its unique blend of high-quality ingredients and delightful Banana Creme flavour, it’s an investment in your fitness journey that you won’t regret!

3. The Bulk Protein Company – Serious Gainz

The Bulk Protein Company’s Serious Gainz is undoubtedly a game-changer in the world of mass gainers, providing a superb blend of taste, value and effectiveness. 

Having tried it myself, I can attest to its muscle-boosting power and sensational flavours. Retailing at around £40 for a colossal 5kg tub, Serious Gainz offers not only exceptional value for money but also an impressive 30 grams of protein and 468 calories per serving to truly propel your muscle growth.

In my experience, the chocolate flavour really hits the spot with its delightful taste, while the red velvet flavour, though interesting, might be a bit too sweet and sickly for some. 

Nonetheless, with 40 servings per 5kg container, you’ll have ample opportunity to discover your favourite flavour and make Serious Gainz an essential part of your fitness journey.

Don’t just take my word for it – the sheer number of rave reviews for Serious Gainz speaks volumes about its effectiveness and taste. 

So, if you’re ready to embark on a transformative journey towards the physique of your dreams, look no further than Serious Gainz by The Bulk Protein Company. 

Go on, give it a try – you won’t be disappointed!

4. Bulk – Lean Mass Gainer

Bulk Lean Mass Gainer has proven to be a game-changer for those who are after a more measured approach to bulking up. 

Priced at an affordable £60 for a generous 5kg bag, this top-notch formula provides fantastic value for money. 

Its unique composition of 328kcal per 85g serving comprises 34g of protein, 34g of carbohydrates, and under 6g of fat, making it the perfect middle ground for trainers aiming to build muscle mass in a controlled manner.

Personally, I found the chocolate flavour to be a scrumptious delight. However, it’s rather disappointing that there are only three flavours to choose from, namely chocolate, strawberry, and vanilla. 

Despite this minor drawback, the quality of the ingredients in Bulk Lean Mass Gainer is unquestionable. Boasting a blend of whey protein concentrate, milk protein concentrate, and egg white powder, it provides a mixture of fast and slow-release proteins. 

Additionally, the carbohydrates are derived from ultra-fine Scottish oats, and the formula even includes glutamine peptides for good measure.

Designed with balance in mind, this mass gainer fills the gap between a traditional protein shake and conventional mass gainers that typically pack over 500kcals per serving. 

If you’re after a product that can help maintain muscle mass without going overboard on carbs, Bulk Lean Mass Gainer is your go-to choice. With 34g of protein in each serving, it’s ideal for post-workout recovery or as a supplementary snack between meals.

In conclusion, Bulk Lean Mass Gainer presents a versatile and balanced option for those striving to bulk up in a more controlled fashion. 

While the limited flavour choices may be a tad disappointing, the overall benefits of this product, coupled with its reasonable price point, make it a must-try for any dedicated fitness enthusiast.

5. MyProtein – THE Gainer

MyProtein’s THE Gainer is certainly a product that has caught the eye of many in the fitness community. 

With a hefty price tag of around £110 for 5kg, one cannot help but question if this mass gainer is truly worth the investment. Despite the high cost, it’s hard to argue with the quality it offers.

Boasting an impressive 55g of protein per serving, 110g of carbs, and 750 calories, this mass gainer stands out for its potential to support muscle growth and recovery. 

The addition of MyZyme™, a superior enzyme blend, further enhances its appeal. However, considering the other mass gainers on this list, I struggle to justify the price.

In terms of ingredients, THE Gainer features a well-rounded protein blend, including whey isolate, whey phospholipid concentrate, hydrolysed whey, and micellar casein, which collectively contribute to muscle building. 

Carb10™, a carb source derived from pea starch, assists in post-exercise recovery, while medium-chain triglycerides (MCT) provide essential fatty acids for a balanced diet. 

Flaxseed is also incorporated for its fibre and fatty acid content. Lastly, MyZyme® breaks down proteins into amino acids during digestion, ensuring optimal absorption.

In my opinion, while THE Gainer is undeniably a high-quality mass gainer, its exorbitant price makes it difficult to wholeheartedly recommend, especially when there are more affordable options available.

I would encourage you to consider the other mass gainers listed before committing to such a costly investment.

What To Look For In A Mass Gainer

Protein content

Protein is a crucial component of any mass gainer protein shake. Look for a product that contains at least 20-25g of protein per serving.

A higher protein count can be beneficial for muscle growth and recovery.

Protein sources

Consider the protein sources used in the product.

A blend of different protein sources can offer a well-rounded amino acid profile, providing sustained release of nutrients to your muscles. Popular protein sources include whey, casein, and plant-based proteins such as pea, rice, and soy.

Carbohydrate-to-protein ratio

The ratio of carbohydrates to protein in a mass gainer protein shake is also important. Aim for a 2:1 or 3:1 ratio to effectively support muscle gain and recovery.

This means for every 2-3 grams of carbohydrates, there should be 1 gram of protein.

Calorie count

Look for a mass gainer with a suitable calorie count per serving to meet your daily caloric needs.

A higher calorie count is typically required for those seeking to put on weight and build muscle. However, it’s important to keep in mind your overall caloric intake to avoid overconsumption.

Quality ingredients

Scrutinise the ingredients list for the presence of quality carbohydrates, healthy fats, vitamins, and minerals.

Quality carbohydrates, such as oats or sweet potato, provide sustained energy release, while healthy fats, such as MCT oil or flaxseed, provide essential fatty acids. Vitamins and minerals support overall health and wellbeing.


Opt for a product with a flavour that you enjoy. Mass gainer protein shakes are available in a variety of flavours, from classic chocolate and vanilla to more adventurous options like banana or strawberry.


Choose a mass gainer that dissolves easily and doesn’t form clumps. This makes it easier to consume and ensures that you’re getting a consistent dosage of nutrients in every serving.


Consider the cost and select a product that fits your budget. Mass gainer protein shakes can range in price from affordable to expensive, so it’s important to evaluate the cost and determine if it’s worth the investment based on your fitness goals and budget.

By considering these factors, you can select a mass gainer protein shake that aligns with your dietary preferences and supports your muscle-building goals.

Mass Gainer FAQ

Athletic couple using a kettle bell

What are mass gainers?

Mass gainers are a type of nutritional supplement designed to support weight gain and muscle growth.

They typically contain a high amount of calories, protein, carbohydrates, and other nutrients to help individuals who struggle to consume enough calories through their regular diet.

Who should use mass gainers?

Mass gainers are ideal for individuals who struggle to gain weight or have a fast metabolism.

They are also suitable for individuals who engage in intense physical activity and require a higher caloric intake to support muscle growth and recovery.

How do mass gainers differ from protein powders?

Mass gainers typically contain a higher amount of calories, carbohydrates, and fat than regular protein powders.

They are designed to support weight gain and muscle growth, while protein powders are primarily used to supplement protein intake for muscle recovery and growth.

Are mass gainers safe to use?

Like any supplement, it’s important to use mass gainers as directed and consult with a healthcare professional before use.

Additionally, it’s important to purchase mass gainers from reputable companies and to check the ingredients list for any potential allergens or harmful additives.

How do I know which mass gainer is right for me?

Consider factors such as your dietary preferences, fitness goals, and budget when selecting a mass gainer.

Look for products with quality ingredients, a high protein and calorie count, and a suitable carbohydrate-to-protein ratio.

Additionally, consider factors such as taste, mixability, and price when making your decision.

Do mass gainers have any side effects?

Some individuals may experience gastrointestinal discomfort or bloating when consuming mass gainers due to their high calorie and nutrient content.

It’s important to start with a smaller serving size and gradually increase to avoid any discomfort.

Additionally, some individuals may experience weight gain beyond their desired muscle mass due to the high calorie count of mass gainers.

When is the best time to take a mass gainer?

Mass gainers are best consumed after a workout or as a meal replacement when a high calorie intake is required.

They can also be consumed as a snack between meals to increase overall caloric intake.

Can mass gainers be used as a meal replacement?

Yes, mass gainers can be used as a meal replacement when a high calorie intake is required.

However, it’s important to ensure that the mass gainer contains a well-rounded nutrient profile, including quality carbohydrates, healthy fats, vitamins, and minerals.

Do I need to exercise to use mass gainers?

While mass gainers are designed to support muscle growth and recovery, they are most effective when used in conjunction with a structured exercise program.

Engaging in resistance training, such as weightlifting, can help to stimulate muscle growth and maximise the benefits of a mass gainer.

How long does it take to see results from using a mass gainer?

Results from using a mass gainer will vary depending on a variety of factors, including diet, exercise routine, and individual physiology.

However, with consistent use and a balanced diet and exercise routine, individuals can expect to see results within several weeks to several months. It’s important to be patient and consistent in your approach to see the best results.


In conclusion, if you’re on the hunt for the best mass gainer, there are plenty of quality products on the market to choose from.

After thorough research and consideration, we recommend the following options:

  • Bulk – Informed Mass Gainer
  • Warrior Lean Mass Gainer
  • The Bulk Protein Company – Serious Gainz
  • Bulk Lean Mass Gainer
  • MyProtein THE Gainer

Each of these mass gainers offers a well-rounded nutrient profile and quality ingredients to support muscle growth and recovery. 

It’s important to evaluate the protein and calorie count, as well as the carbohydrate-to-protein ratio, to ensure that the mass gainer aligns with your individual dietary preferences and fitness goals. 

Additionally, consider factors such as taste, mixability, and price when making your decision. With these factors in mind, you can select the best mass gainer to support your muscle-building journey.

Check out the list above and choose one of the Mass Gainers to help your GAINZ. 

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