10 Best Muscle Mass Gainer in The UK

Last updated on 15/08/2025

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Optimum Nutrition Serious Mass Protein Powder with Creatine, Glutamine, 25 Vitamins and Minerals, Strawberry Flavour, 16 Servings, 5.45KG

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Why We Love It

Supports muscle growth and performance.
Promotes recovery with low fat.
Tasty flavors for enjoyable consumption.

Main Highlights

CALORIE RICH PROTEIN SOURCE – the ultimate gainer powder which can be used post-workout or between meals
SUPPORTS SERIOUS SIZE – great for those aspiring to be bigger, for those who find it hard to gain weight / muscle, or for those on the go who have high caloric needs due to intense training
1,255-1272 CALORIES per serving – when mixed with water
50 g – 53 g PROTEIN per serving – supports your muscle-building efforts
250 g+ CARBOHYDRATES per serving – helps refuel the body’s glycogen stores from grueling workouts in the gym
ADDED CREATINE, L-GLUTAMINE & GLUTAMIC ACID
INSTANTISED POWDER – helps the powder dissolve easily and mixes well in a blender with other ingredients such as fruit and nut butters for added calories
24 VITAMINS & MINERALS per serving
NO ADDED SUGAR AVAILABLE IN 6 LB TUBS OR 12 LB BAGS
EU Address: Optimum Nutrition, Glanbia Nutrition, 4, Waterside, Citywest Business Campus, Kingswood Ave, Cooldown Commons, Dublin 24

USN Hyperbolic Mass Strawberry Cheesecake 6kg: High Calorie Mass Gainer Protein Powder for Muscle Building and Weight Gain - Improved Formula & Flavour with 7.5g Creatine Monohydrate and Less Sugar

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Why We Love It

Uncompromised taste with muscle mass.
High calorie for quick results.
Nutrition-rich performance booster.

Main Highlights

Our best mass gainer yet: Our best-tasting mass gainer is for those who want to increase their muscle mass, but don't want to compromise on the taste of their protein drink.
High calorie bulk powder: With up to 1183 calories our all-in-one mass and weight gainer is ideal for individuals who struggle to gain muscle mass and want a fast-acting, easy-mixing and effective formula.
Amazing taste, great results: The improved formula of our delicious strawberry flavour mass gainer provides a greater post-workout effectiveness, with a smoother taste - all delivered with less Sugar.
A weight gainer with nutrition: Our mass protein powder contains a massive 60g of protein per serving, partnered with 7.5g of Creatine and 18 vitamins and minerals (B12, B6, C, Magnesium, Iron) to help you be at your best.
For best results: To get the best results from Hyperbolic Mass, take 1 servings daily, either after training or as a snack between meals. Simply mix 4 scoops (300g) of the protein powder with 900ml of cold water and enjoy.

Optimum Nutrition Serious Mass Protein Powder High Calorie Mass Gainer with Vitamins, Creatine and Glutamine, Strawberry, 8 Servings, 2.73 kg, Packaging May Vary

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Why We Love It

Supports muscle growth and performance.
Promotes recovery with carbohydrates.
Offers tasty, diverse flavor options.

Main Highlights

Low fat mass gainer with over 1250 CALORIES and 50g of PROTEIN per serving to support muscle growth* plus 3 grams of CREATINE MONOHYDRATE to support performance**
No added sugar protein powder formula with 25 vitamins and minerals and less than 5g fat per serving, plus over 250 grams of CARBOHYDRATES helping support muscle recovery***
Serious Mass protein powder comes in 6 flavours (banana, chocolate peanut butter, chocolate, cookies & cream, strawberry and vanilla) & contains sweetener
To prepare weight gainer mix 2 scoops with 710 ml of water or plant milk, add fruit or nut butters for a tasty and calorific post workout or between meals protein smoothie
Source EFSA Journal *2010;8(10):1811; 2011;9(6):2203; ** 2011;9(7):2303; ***2011; 9(7):2303

MuscleTech MassTech Extreme Protein Powder, Weight & Muscle Mass Gainer, Whey Mass Protein Powder with 3g Creatine, 80g Protein, 2,282 Calories, 2.72kg, Vanilla Cake

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Why We Love It

Enhances workout by smashing plateaus.
Boosts immune system functionality.
Loaded with essential nutrients.

Main Highlights

Get bigger and stronger; each serving of the 5-In-1 mass gainer formula has 80 g protein, Over 400 g carbs, over 2,000 Calories, 3 g creatine And 23 vitamins and minerals
Smash performance plateaus, it also contains bcaas from whey protein plus zinc, vitamin C, B6 and B12, to support the normal functioning of your immune system, especially important when pushing training to the max
High-density, clean-calorie shake, reignite your goals with a great-tasting shake that provides a supplemental 2,000 plus calories per day, an amount scientifically studied in university Rresearch
Support Recovery, each serving, 4 scoops mixed with 500 ml skimmed milk, of mass-tech extreme 2000 delivers a powerful carbohydrate recovery blend that promotes muscle glycogen replenishment
Immune support, every serving provides essential micronutrients, including zinc, vitamin c, B6 And B12, to support the normal functioning of your immune system, especially important when you’re pushing your training to the max

The Bulk Protein Company

Anabolic Gainz 5kg – Mass Gainer – 30g Protein Powder – Contains 3g Creatine Per Serving – Post Workout Recovery Fuel to Build Lean Muscle – 40 Servings – GMP Certified – TBPC (Vanilla)

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Why We Love It

Supports fast muscle growth.
Packed with essential nutrients.
Easy to mix.

Main Highlights

ANABOLIC GAINZ – Is a protein powder, designed to supplement muscle growth and to be consumed as a post-workout shake. We’re now available in the staple flavours, these are Chocolate, Strawberry, and Vanilla.
NUTRITIONALS – Our Anabolic Gainz Mass Gainer comes in a 5kg tub containing 30g of Protein and is packed with over 450 calories! In addition, we’ve added 3g of Creatine per serving to support muscle growth, recovery, and performance.
MACROs – Our shake contains Carbohydrates, Creatine, Amino Acids, Vitamins, and Minerals. It’s a great-tasting protein drink that will slot straight into your supplement stack.
40 SERVINGS – With over a month's supply this protein powder will help reach your goals. It mixes well and doesn’t require a blender, simply look out for our TBPC Gainz 800ml Shaker.
TBPC – Here at The Bulk Protein Company we're serious about value, huge protein levels, and incredible results in your training & diet. If you're serious about training, Anabolic Gainz is for you. GMP Certified, Manufactured in the UK.

Warrior Mass Protein Powder – 5.04kg – Serious Mass Gainer – High Calorie, Weight Gain Supplement – 61g of Protein, 18 Servings, 1000+ Calories Shake, Supports Muscle Growth (Vanilla Cheesecake, 5kg)

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Why We Love It

Supports muscle, strength, mass gains.
Helps meet daily protein needs.
Offers six tasty flavours.

Main Highlights

✅ WARRIOR MASS – Has been designed to support muscle, strength, and mass gains. If you're an MMA fighter, boxer, or rugby player, or train aggressively to get REAL results from your body, Warrior MASS is for you!
✅ 61g PROTEIN PER SERVING TO BUILD MUSCLE MASS – A convenient supplement to meet your daily protein needs. Our Warrior MASS protein shake is packed with over 1000+ calories!
✅ 6 FLAVOURS – Warrior MASS comes in 6 tasty flavours: Double Chocolate, White Chocolate, Banana Crème, Vanilla Cheesecake, Salted Caramel, and Strawberry Crème.
✅ 5.04KG & 18 SERVINGS – An excellent value mass/weight gainer. Our recommended serving size is 2 rounded scoops (280g), and we suggest mixing it with 300 ml of water.
✅ PROTEIN BLEND – Made with Whey Protein Concentrate to provide an instant protein injection and Micellar Casein, which digests slowly over 8 hours. It’s perfect post-workout, ideal between meals, and an exceptional addition of clean food support to your daily diet. Warrior MASS has got your back.

Boosts mass for hard gainers.
High calorie for weight gain.
Gourmet taste adds joy.

Main Highlights

Extreme Calorie Load | Delivers up to 2,540 calories per day when mixed with 1% milk — engineered for hardgainers and those with extreme muscle growth goals.
High-Quality Protein Blend | Contains 92 g of protein from fast, medium, and slow-digesting whey sources to support muscle growth and recovery.
Complex Carb Matrix | Packed with 510 g of carbohydrates per 2 servings from whole food-based sources like waxy maize, sweet potato, and maltodextrin to fuel intense workouts.
Loaded with BCAAs & Glutamine | Provides 17.3 g of key amino acids (L-Leucine, L-Isoleucine, L-Valine, and L-Glutamine) to support recovery and protein synthesis.
Enzyme Fortified | Includes a digestive enzyme blend (Lactase & Protease) to help improve nutrient absorption and ease digestion of this dense shake.

Specially formulated high-calorie content.
Contains quality proteins and nutrients.
Transparency of ingredients used.

Main Highlights

HARDCORE MASS-BUILDING CALORIES – Delivers an incredible 1,100 nutrient-dense calories per serving to support fast muscle growth and strength gains.
ADVANCED PROTEIN FORMULA – Includes whey protein isolate, hydrolyzed whey, micellar casein, and milk protein concentrate to power recovery and build lean mass.
ELITE WHOLE-FOOD CARB SOURCES – Packed with complex carbohydrates from sweet potato, rolled oats, and waxy maize starch to provide clean, long-lasting energy.
AMINO ACID & RECOVERY SUPPORT – Features 36g of essential amino acids (EAAs), including 10.4g Glutamine and 12.2g BCAAs, for muscle repair and growth.
ENGINEERED FOR EXTREME RESULTS – Designed for athletes looking to smash plateaus, this gainer provides quality macros without unnecessary fillers.

USN Muscle Fuel Anabolic All-In-One Muscle Mass Gainer, Cookies & Cream Flavour - 2kg, 54g Protein Powder, 5g Creatine Powder & 5g BCAAs For Maximum Muscle Growth, Post Workout Recovery Drink Mix

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Why We Love It

Optimal protein and creatine dosage.
Enhances physical performance.
Decreases muscle protein breakdown.

Main Highlights

USN Muscle Fuel Anabolic protein drink mix: High protein shake powder with Vitamins, Minerals, Carbohydrates, BCAAs, Amino Acids and Creatine. Premium dietary supplement designed to support muscle building
Premium women's and men's supplements: USN diet supplements offer proven benefits, when taken alongside a balanced diet and healthy lifestyle. Always consult a healthcare professional first
Mass gainer protein powder: Cookies and Cream flavoured drink powder with 54g of premium quality protein, 77g of carbohydrates and 850mg of HMB to support muscle recovery, growth and performance
Reach your goals: All in one muscle gain building stack, combined with raw creatines and carbohydrates, so creatine is easily absorbed and transported around the body. Easy to mix with water
Ultimate Sports Nutrition: USN are at the forefront of sports nutrition research, making effective sports nutrition supplements for professional and non-professional athletes, pre or post workout

MuscleTech MassTech Elite Protein Powder, Weight & Muscle Mass Gainer, Whey Isolate Mass Protein Powder With 3g Creatine, 80g Protein, 18g BCAA, 14 Servings, 3.2kg, Cookies & Cream

21% Off

Why We Love It

Boosts muscle and strength gains.
Ideal for bulking phases.
Overcomes strength plateaus effectively.

Main Highlights

HIGH PROTEIN MUSCLE BUILDING MASS GAINER - Delivers 80 g protein, 163 g carbs, 3 g creatine, and over 1,000 nutrient-dense calories (with 510 mL of skim milk)
HIGH PROTEIN MUSCLE BUILDING MASS GAINER - Delivers 80 g protein, 163 g Carbs, 3 g creatine, and over 1,000 nutrient-dense calories (with 510 mL of Skim Milk)
STRENGTH-ENHANCING MASS GAINER - MuscleTech researchers developed this muscle mass gainer for those who have struggled with adding size, are in their bulking phase, or want to break through their strength plateaus
EXPLICITLY CLEAN HIGH-QUALITY PROTEIN - Using a cold-filtration microfiltration process, mass-tech elite guarantees a high-quality protein profile that removes unwanted fats
ENHANCED WITH CREATINE - Unlike some other leading gainers, Mass-Tech Elite delivers a 3-gram researched dose of creatine to increase strength

8.7

Excellent

Save 21%

We scanned 1389 products

We reviewed these offers relevant to the Muscle Mass Gainer within online retailers such as Amazon, eBay and other local retailers, ensuring we covered all major brands and models. The products we selected come from trusted brands like Optimum Nutrition, USN, Muscletech, The Bulk Protein Company, Warrior, Mutant, all of which have a reputation for consistently delivering high-quality products that users love and innovative approaches for function & design.

For the best Muscle Mass Gainer in the market, we considered we took a deep dive into 6946 online reviews , focusing on elements like user satisfaction, performance in real-world conditions, and long-term reliability. Our ranking also evaluates each review’s relevancy, authenticity, up-to-dateness and depth so that the comparison is more sound.

We concluded that:

The clear winner of our analysis is Optimum Nutrition Serious Mass Protein Powder with Creatine, Glutamine, 25 Vitamins and Minerals, Strawberry Flavour, 16 Servings, 5.45KG. We love many things about this product by Optimum Nutrition. What sets it apart from the competition is Supports muscle growth and performance. , Promotes recovery with low fat. , Tasty flavors for enjoyable consumption.
The best value product for most shoppers and where user satisfaction is continuously the highest is USN Hyperbolic Mass Strawberry Cheesecake 6kg: High Calorie Mass Gainer Protein Powder for Muscle Building and Weight Gain - Improved Formula & Flavour with 7.5g Creatine Monohydrate and Less Sugar by USN based on online reviews by bloggers, experts and online shoppers.
The biggest bargain at the moment for Muscle Mass Gainer and the best cost-to-value ratio is MuscleTech MassTech Elite Protein Powder, Weight & Muscle Mass Gainer, Whey Isolate Mass Protein Powder With 3g Creatine, 80g Protein, 18g BCAA, 14 Servings, 3.2kg, Cookies & Creamat Muscletech with a 21% discount.
Our list of the best Muscle Mass Gainer is updated regularly to reflect new releases and changes in product availability, so be sure to check back often for the latest rankings and discounts.

10 Best Muscle Mass Gainer in The UK

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We scanned 1389 products

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