Top Best Mass Gainers In 2023

With so many mass gainer products on the market in Britain it’s hard to work out what is the best mass gainer UK customers can buy. If this is something you are struggling with then you have come to the right place.

In this guide on the best weight gainer UK residents can get their hands on we will be explaining everything you need to know about how to choose a mass gainer as well as showing you the top rated mass gainers available to buy.

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What Is A Mass Gainer ?

If you are not 100% sure what a mass gainer does then you are not alone.

A mass gainer is exactly that, a supplement that helps you to increase your total body mass.

How do mass gainers work ?

When bodybuilding you use an awful lot of calories and if you are to bulk up then you are going to have to up your calorie intake. This is what a mass gainer does as it is full of calories, protein and vitamins, where as a protein powder is for increasing muscle a mass gainer is mainly for bulking up or in other words to put weight on that can be used as fuel and turned into rock solid muscle.

What Are The Benefits Of Mass Gainers ?

Aside from the obvious there are many other benefits to adding a mass gainer to your supplement intake. Below you can find a list of some of the most important benefits associated with mass gainers.

  • Easier to reach your calorie intake
  • Increased weight gain
  • Convenient way to intake calories
  • Aids in recovery
  • Contains plenty of vitamins and nutrients
  • Can be used to replace a meal when busy

As you can see the benefits of taking a mass gainer outweigh the reasons for not taking one. To be honest I can’t think of a reason for a bodybuilder or someone wanting to get in shape not to take a mass gainer.

Best Mass Gainer UK

Best Cheap Weight Gainer

For less than £5 per Kg Bulk Protein have come up with a very effective and cheap weight gainer.

Bulk Protein Company Serious Gainz Mass Gainer

The Bulk Protein Company - SERIOUS GAINZ Whey Protein PowderFeatures

486 calories per serving

30g of protein per serving

81g of carbs

Our View

If it’s a cheap mass gainer that you’re after then this is probably the best on the market. At £5 per Kg compared to the usual £10 of other brands, this is a bargain. Although there isn’t as much protein as with the most expensive brands there is still 30g of the stuff per serving.

There are 6 flavours these are vanilla, banana, strawberry, white chocolate, black forest and black cherry.

Reviews say that this mass gainer doesn’t mix the best which basically means you’re going to have to put a little more effort in when shaking that bottle.

Overall this is a well balanced mass gainer supplement with a variety of flavours and costing half the price of the top brands making it the best cheap weight gainer.

Top 5 Best Weight Gainers UK

5) Hench Nutrition Hi-Calorie Mass Gainer

Hench Pro Hi-Calorie Mass GainerFeatures

100% Money Back Guarantee

1000 calories per serving

55g of protein per serving

Contains fat burning MCT’s, essential fatty acids and omega’s

Our View

This mass gainer by Hench is described as a high calorie gainer and although there are mass gainers with more calories this still provides plenty for bulking up. There is a very respectable 55g pf protein per serving making it on par with more expensive brands. All in all this is a good cheap mass gainer and it comes in five flavours these are chocolate, strawberry, banana, vanilla and butterscotch.

Some reviews say that it doesn’t mix well. However this is mainly due to people using a there protein shake container to mix it for best results i would use a blender as there is a lot more powder in the mix and a protein shake bottle doesn’t really leave much room after 600ml of milk and the powder is added.

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4) Reflex Nutrition Instant Mass

Reflex Nutrition Instant Mass HeavyweightFeatures

1,160 calories per serving

Contains high BV Quattro protein complex provides a massive 60 grams of protein per serving

Includes a unique CarboBioticsTM carbohydrate complex with no added sugars

Packed with a stack of the world’s purest most proven Creapure creatine with added zinc, magnesium and vitamin D3

Our View

This is a great value for money mass gainer by Reflex Nutrition with a massive 60g of protein and 1160 calories per serving expect to notice gains fairly quickly.

There are four flavours to choose from these are chocolate peanut butter, chocolate perfection, strawberries & cream and finally vanilla ice cream. Not the biggest variety but no doubt there will be new flavours in the future added to the range.

According to reviews on Amazon this mass gainer supplement mixes easily and with no added sugar it’s not as sweet as some of the best weight gainers.

3)USN Hyperbolic Mass All-In-One Gainer


USN Hyperbolic Mass All-In-One Gainer Shake Powder

1,109 mass gaining calories per shake

61g of protein per serving

202g of carbs per serving

4.7g of creatine

Added creatine to improve physical performance

High levels of intrinsic BCAAs and Glutamine

Our View

USN never fail to amaze with their products and their Hyperbolic Mass all-in-one gainer is no different. This particular mass gainer is described as hyperbolic, this basically means that it is best suited for those with a fast metabolism.

As with all USN supplements they this gainer is very easy to mix and there is rarely any clumping. The only bad thing to say about this mass gainer is that there is only the three standard flavours chocolate, banana and strawberry.

Another high quality supplement by USN and definitely worth purchasing especially if you do have a fast metabolism and struggle to put weight on.

2) Mutant Mass Weight Gainer

Mutant Mass Weight GainerFeatures

A high calorie weight gainer bodybuilding and sports nutrition supplement

In each serving you receive 52 grams of protein, 170 grams of carbohydrates and 1050 calories Mutant

Mass contains 10 different sources of high quality proteins within its multi stage release system

All designed to be released when needed, into the bloodstream, and only to build lean tissue and expand your muscles

Our View

Mutant Mass has a reputation for rapid weight gains and is perfect for bulking up. With 1050 calories and 52 grams of protein per serving it’s not hard to see why.

The scientific research behind this weight gain is extensive and is one of the main reasons why Mutant Mass performs so good as a mass gainer. Due to the multi-staged protein matrix found in Mutant Mass the body receives a steady supply of amino acids all day and night aiding in building muscle mass.

There are eight flavours these are chocolate, chocolate hazelnut, chocolate peanut, cookies & cream, strawberry banana cream, strawberry & banana, vanilla and finally vanilla ice cream. Personally i always prefer the chocolate with any supplements as i know what to expect.

Not quite our best mass gainer but Mutant Mass is definitely one of the best UK mass gainers available to buy.

1) Optimum Nutrition Serious Mass Weight Gain Powder

Optimum Nutrition Serious Mass Protein Powder High Calorie Mass GainerFeatures

Each delicious shake contains 1,250 calories, with no added sugar

Every serving delivers 50 g of blended protein to support building muscle

250 g of carbohydrates to fuel intense workouts and help replenish glycogen stores

Includes 25 vitamins and minerals, creatine, glutamine and MCT

Our View

Is this the best mass gainer uk customers can buy? If sales and five-star reviews are anything to go off then the answer is yes.

This mass gainer supplement has everything you would expect from the best mass gainer UK customers can buy. First of all there is 1250 calories per serving and a massive 50g of blended protein. In addition there is 250g of carbohydrate and 25 vitamins and minerals.

When it comes to flavours there is the usual chocolate, banana and strawberry as well as cookies and cream and finally chocolate peanut butter. Although there are other brands with many more flavours, with a choice of five there should be one that most people like.

Reviews on Amazon show how effective this mass gainer actually is with most people saying how they noticed increased muscle mass not long after using Optimum Nutrition serious mass gainer.

Optimum Nutrition Mass Gainer Review

In this video you can find a more in-depth review of our number 1 mass gainer.

What To Look For When Buying A Weight Gainer

When choosing the best mass gainer UK residents can buy there is a few things that you need to consider before buying if you are to get the right one for your needs. In the list below you can find the most important things to look out for before you purchase the best weight gainer for your needs

Price – This is an important factor for most people and it can be quite difficult choosing a weight gainer based on price. Just because a weight gainer is cheap doesn’t necessarily mean you should buy it. Most cheap weight gainer are not as high quality in terms of ingredients when compared to the more expensive and well-known ones. When choosing a weight gainer always work out the price per serving to see how much each shake costs.

Ingredients – This is the most important thing to look at when buying weight gain. When looking at the ingredients you should be seeing how much protein there is per serving and how many calories and carbs etc. In addition to looking at the ingredients you should always check to see how it stacks up against any other supplements that you are taking. As you may not want to be taking too many carbs and when added with the carbs in other supplements that your taking, this may go over the amount you don’t want to exceed.

Are Brands Important ?

Brand – When buying a mass gainer always make sure that you are purchasing from a well-known and trusted brand. If you are not familiar with supplement brands then do your research, all the mass gainers in our top list are from the most popular and well established supplement brands.

Taste/flavour – for some the taste and flavour is an important factor when choosing a mass gainer and this is understandable as the servings are quite big. There are literally hundreds of different flavours when it comes to choosing a mass gainer. So it shouldn’t be too hard to find one that you like. However if you do decide to go with an unflavored mass gainer then you will save yourself a little bit of money as they tend to be a little bit cheaper.

Final Words

When looking for the best mass gainer UK customers have an almost unlimited choice and with so many competing brands all claiming to be the best it can be hard to know which ones are genuinely the best. In this article we have brought you the very best from cheap mass gainers to the best weight gainer UK customers can buy.

All the brands featured are UK certified and meet strict health regulations.


Should Skinny Men Take Mass Gainer?

Generally speaking, mass gainer is not necessary for skinny men. However, if you are struggling to put on weight and increase muscle size, then a mass gainer may be a good choice. When taken in moderation and used in combination with strength training and nutrition, mass gainers can provide the extra caloric intake needed to build lean muscle mass.

Should I Drink Mass Gainer Every Day?

It’s important to keep in mind that mass gainers should not be used as a meal replacement or consumed every day. These drinks are meant to supplement your regular diet and can be used to increase calorie consumption in order to gain weight. For best results, use mass gainer as a supplement to your regular diet and workout routine.

Is Mass Gainer Better Than Creatine?

Both mass gainers and creatine can help with muscle building, but they work in different ways. Creatine boosts the development of energy-producing molecules in the cells. On the other hand, mass gainers are a type of protein supplement that provides a larger amount of calories and is often used to support weight gain. Ultimately, it depends on your individual goals as to which is better for you.

When Should You Not Take Mass Gainer?

Mass gainers should not be taken if you are pregnant or nursing, as the additional calories can be too big of an increase. They should also not be taken in place of proper meals as they do not provide your body with all the vitamins and minerals it needs. Additionally, people with any underlying health conditions should consult their doctor before taking a mass gainer supplement.

Do Mass Gainers Have Side Effects?

Although mass gainers are generally considered safe, taking them in high doses may lead to some side effects. Some common side effects include stomach upset, cramping, bloating, headaches, and increased water retention. Additionally, consuming too many calories at once can lead to an increased risk for type 2 diabetes and other metabolic disorders. However, these side effects should be minimal if taken as directed.

References and further readings:

  1. Ways To Improve Your Muscle Mass
  2. Harvard School of Public Health – The Nutrition Source; Workout Supplements
  3. Journal of the International Society of Sports Nutrition volume 14, Article number: 20 (2017) – Protein & Exercise
  4. Sports Med 2015 Jan;45(1):111-31 – The effects of protein supplements on muscle mass, strength, and aerobic and anaerobic power in healthy adults.

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    Best Mass Gainer In India - Fitness Fighters November 15, 2017 at 9:24 pm

    […] so many mass gainer products on the market its hard to work out what is the best mass gainer in India. If this is something you are struggling with then you have come to the right […]

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