The 3 Best Mass Gainers In The UK In 2021

Picking the best mass gainer can make a big difference in helping to support your body goals. Here's everything you need to know

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Best Mass Gainer UK
(Photo: Adobe Stock)

As a naturally skinnier guy, it can sometimes be difficult to gain weight and add muscle mass – no matter how hard you’re working in the gym.

If you’re what’s considered to be a ‘hard-gainer’, you may feel like you need to be constantly eating to support your muscle-building goals. It can sometimes feel like whenever you’ve just finished one huge meal, it’s already time for the next one.

We all know that protein contributes to the growth and maintenance of muscle mass, but it’s also important to ensure that you’re hitting your overall calorie goals per day too.

‘Weight gainers’ (also known as ‘mass gainers’) are powder form supplements which pack in a larger portion of calories than the average protein shake to help support your training goals.

Essentially, they are designed to be a convenient way to help you to reach your calorie and macronutrient targets, as part of a healthy diet and lifestyle.

We always recommend choosing real food over supplements. And it’s important to remember that supplements are not intended to replace a varied diet and healthy overall lifestyle.

But when time is at a premium, and you’re already sticking to a healthy diet, then adding in supplements from time to time can help to support you as you look to smash your fitness goals.

If you’re looking to build more lean muscle and have struggled to bulk up in the past, it’s definitely worth considering trying a mass gainer supplement to see if it’ll help you.


They are certainly not for everyone – but when the right product is used correctly, mass gainers can be a convenient addition to your regimen to support your body goals.

Editor's note: The content on this website is meant to be informative in nature, but it should not be taken as medical advice. Our articles and the products featured in them are not intended for use as diagnosis, prevention, and/or treatment of health problems. Always speak with a certified medical professional before making any changes to your lifestyle, diet, exercise routine, and/or taking any supplements.

So, let’s take a look at some of the benefits of taking a modern mass gainer and how they can help to support your fitness goals.

Best Mass Gainers UK – Top Three Picks

Rating Summary Website
Myprotein Weight Gainer Blend Myprotein Weight Gainer Blend • Trusted Brand • 31g Protein • 50g Carbs • 388 Calories Buy Now
The Protein Works Total Mass Matrix The Protein Works Total Mass Matrix • 30g Protein • 64g Carbs • 476 Calories • Seven Flavours Buy Now
Bulk Informed Mass Gainer Bulk Powders Informed Mass • 45g Protein • 75g Carbs • 566 Calories • Added Creatine Buy Now

Why Take A Mass Gainer?

You won’t need us to tell you that the health and fitness industry has blown up over the last few years – and that means there has never been a better selection of quality products on sale to help you achieve your goals.

There are many advantages of taking a high quality mass gainer, such as:

• Convenient source of protein for supporting muscle growth
• Can be used as a meal replacement
• Convenient source of carbohydrates
• Can make it easier to reach daily calorie targets
• Convenience and speed

Mass gainers are not for everyone, however. You need to be brutally honest with yourself and assess your workout regime and diet as it stands before deciding to try one of the products listed below.

But when used properly, the right mass gainer can provide some excellent support on your health and fitness journey.

Things To Look For In A Mass Gainer

As you’ve probably already realised, there are many different mass gainers on sale these days and comparing all of these products can be time-consuming and confusing. (Scroll down for our three current UK favourites below).

Nevertheless, there are some key components that you should always look for when choosing a mass gainer. Here are some of the things to bear in mind.

• At least 30 grams of protein per serving – It goes without saying that if you’re looking to build lean muscle, you’re going to need to ensure you’re consuming the right amount of protein Many guys who are used to taking protein shakes after the gym often choose to replace that post-workout shake with a mass gainer because they find it works better for them. The way you integrate your mass gainer into your regime really comes down to your personal preference, but it’s worth making sure that your chosen product packs in more than 20 grams of protein per serving to help support the growth and maintenance of muscle mass.

• Minimum of 350 calories per serving – If you’re looking to build extra muscle, you’re going to need to ensure you’re consuming enough calories for your goals. One of the main reasons mass gainers are so popular is because they are a convenient way of adding extra calories to your diet without very much effort. If you’re looking for a mass gainer, anything less than 350 calories per serving probably isn’t worthwhile.

• At least 50 grams of (quality) carbohydrates per serving – It’s easy to fall into the trap of eating sugary foods to meet your carb targets but you’re much better off consuming ‘good’ complex carbs, which are digested slowly. Some of the mass gainers in our list below use oats as their complex carb base.

Protein Shake Drink

(Photo: Adobe Stock)

Things To Avoid In A Mass Gainer

• Proprietary blends – This is when a supplement company only discloses the ‘blend’ totals on the label, rather than the individual ingredients. This means that you won’t have any idea about how much of each ingredient is in the total blend. This is not what you want, especially as you’re going to be forking over your hard-earned cash in return for your mass gainer.

• Sugar content – Mass gainers are known for packing in as many calories as possible but unfortunately some supplements achieve their calorific targets by including excessive amounts of sugar. If you’re looking to take your shake post-workout, a reasonable amount of fast-digesting, high glycemic index carbs can help replenish glycogen stores. If you’re considering a meal replacement shake, it’s generally best to look for one with more complex carbs and less free sugar. Either way, keep an eye on sugar content.

• The brand – With so many products on the market these days it’s easy to feel overwhelmed by the huge number of options. More than ever, it’s worth doing your research into the brand you’re buying from. Search the internet for reviews and find out a bit about the history of the brand. You’ll be thankful you did your research in the long run.

When To Take A Mass Gainer

Mass gainer shakes can generally be taken at any time of day when you’re needing calories.

Some people opt to take shakes after their workout but they can really be taken at any time. Don’t forget that you could use your new mass gainer to replace your current protein shake, although this will come down to your personal preference and needs.

It’s also worth reading each manufacturers’ instructions on when to consume their shakes and carefully checking the entire label. As we mentioned above, there’s absolutely no point in taking a mass gainer if your workout regime and diet are not on point, so make sure you get those sorted first.

As a rough guide, some of the best exercises for building muscle mass include: deadlifts, squats, bench press, pull-ups, rows. Generally, you want to be focusing on the large compound exercises that use the main muscle groups.

We always recommend speaking to your doctor or a certified medical professional before taking any new supplements or making any major lifestyle changes.

Best Mass Gainers – Our Pick

OK, so we’ve talked you through the various benefits of mass gainers and what to look for when selecting your product. Now let’s get to the list of some of the best mass gainers in the UK right now.

1) Myprotein Weight Gainer Blend

Product website: www.myprotein.com

Myprotein Weight Gainer Blend

The first product on our list is the excellent Weight Gainer Blend from Myprotein.

Myprotein are one of the biggest names in the health and fitness supplements industry and they’re well-known for their excellent products and good value for money.

The Weight Gainer Blend supplement comes in five different flavours, and offers decent value for money.

Each serving contains 31 grams of protein, a 50 grams of carbs, and comes in at a total of 388 calories per serving.

We especially like the fact that this supplement uses ground oats as its main carbohydrate source.

The Weight Gainer Blend comes in two sizes, either a 2.5kg bag or a 5kg bag.

The Pros:

• 31g of protein per serving
• 50g of carbs per serving
• 388 calories per serving
• Uses ground oats as carb source
• Low sugar content (2.6g per serving)
• Five flavours to choose from

The Cons:

• Uses sucralose as a sweetener
• You’ll need to spend £40 to get free delivery

Our Verdict:

The Weight Gainer Blend from Myprotein is an excellent option that uses ground oats as its main carbohydrate source. It also boasts a low sugar content (2.6g per serving) and comes in a range of different flavours.

2) The Protein Works Total Mass Matrix

Product website: www.theproteinworks.com

The Protein Works Total Mass Matrix

Next on our list is Total Mass Matrix from The Protein Works.

The Protein Works are a UK-based fitness supplements company that have been around for a while now and are well-known for their affordable products.

Total Mass Matrix is their main mass gainer offering, and its impressive formula packs in 477 calories, 31 grams of protein and 63 grams of carbs per serving.

We’re big fans of The Protein Works’ range of supplements and their Total Mass Matrix is certainly impressive. It comes in seven different flavours, including our favourite chocolate mint, and is available in bags sized 2kg, 5kg and 10kg.

The Pros:

• Great value for money
• 2:1 carb to protein ratio
• 30g of protein per serving
• 64g of carbs per serving
• 476 calories per serving
• Seven flavours to choose from
• Popular brand

The Cons:

• Uses sucralose as a sweetener
• 15g of sugar per serving

Our Verdict:

We’re big fans of the Total Mass Matrix from The Protein Works. This supplement offers excellent value for money and good amounts of protein and carbs per serving.

3) Bulk Informed Mass Gainer

Product website: www.bulk.com

Bulk Informed Mass

The next mass gainer on our list is Informed Mass Gainer from Bulk.

Bulk are well known in the supplements industry for offering excellent value for money and not compromising on quality.

The Informed Mass Gainer certainly packs a punch. It contains 45 grams of protein, 75 grams of carbohydrates and a total of 566 calories per serving.

What’s more, it’s available in four different flavours and offers pretty good value for money for what you get in each serving.

Informed Mass only contains 2.9g of sugar per serving, and also packs in other ingredients such as Creatine and DigeZyme.

It uses ‘Ultra Fine Scottish Oats’ as its main carbohydrate source.

The Pros:

• 45g of protein per serving
• 75g of carbs per serving
• 566 calories per serving
• Also contains Creatine and other ingredients
• Low sugar content (2.9g) per serving

The Cons:

• May have too many ingredients for some people
• Only one size available (3kg at the time of writing)

Our Verdict:

Bulk’s Informed Mass Gainer is a great option if you’re looking for a mass gainer that also contains some added ingredients such as Creatine Monohydrate.

Anything Else To Consider?

As we have already mentioned a couple of times in this article, it’s very important to ensure that your diet and training regime are on point before thinking about any kind of supplementation.

It’s also important to remember that food supplements such as the ones featured on this page are not intended to replace a varied diet and an overall healthy lifestyle.

Supplements can be a great and useful addition to your regimen if you’re already training right and following a good diet.

As we also mentioned above, it’s always best to speak to your doctor or a certified medical professional before taking a new supplement or making any major lifestyle changes.

Protein Shake Fitness

(Photo: Adobe Stock)

Conclusion – Our Final Thoughts

So, there you have our pick of the best three mass gainers on the market in the UK if you’re looking to support your muscle-building goals.

We’ve walked you through the key things you need to know about mass gainers in general, and have also singled out our three top picks on the market at the moment in the UK.

We really like Myprotein’s Weight Gainer Blend because of the low price and low sugar content. The Protein Works’ Total Mass Matrix and Bulk’s Informed Mass Gainer are also both quality products.

You’re unlikely to go too far wrong by selecting any of the supplements on this list, but our favourite right now is Myprotein’s Weight Gainer Blend.

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