10 Best High Protein Powders Muscle Gain in The UK
Last updated on 13/09/2025
Advertising disclosure
Advertising disclosure
Best Choice
1
Optimum Nutrition Serious Mass Protein Powder High Calorie Mass Gainer with Vitamins, Creatine and Glutamine, Chocolate Peanut Butter, 16 Servings, 5.45 kg, Packaging May Vary
Optimum Nutrition
12% OffFree Shipping
Show More
Optimum Nutrition
Optimum Nutrition Serious Mass Protein Powder High Calorie Mass Gainer with Vitamins, Creatine and Glutamine, Chocolate Peanut Butter, 16 Servings, 5.45 kg, Packaging May Vary
12% OffFree Shipping
Why We Love It
- Supports muscle growth and performance.
- Healthy, low-fat, high-calorie content.
- Six tasty, varied flavors.
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
Show More
Value for Money
2
USN Hyperbolic Mass Dutch Chocolate 6kg: High Calorie Mass Gainer Protein Powder for Muscle Building and Weight Gain - Improved Formula & Flavour with 7.5g Creatine Monohydrate and Less Sugar
USN
Free Shipping
Show More
USN
USN Hyperbolic Mass Dutch Chocolate 6kg: High Calorie Mass Gainer Protein Powder for Muscle Building and Weight Gain - Improved Formula & Flavour with 7.5g Creatine Monohydrate and Less Sugar
Free Shipping
Why We Love It
- Enhances muscle mass effectively.
- Offers nutritional weight gain.
- Delicious chocolate flavor.
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 chocolate flavour mass gainer contains natural cocoa, 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.
Show More
3
SERIOUS Protein – Protein Powder – 4kg – Low Carb – Supports Lean Muscle Growth – Recovery Supplement - The Bulk Protein Company - 133 Servings (Banana)
The Bulk Protein Company
20% OffFree Shipping
Show More
The Bulk Protein Company
SERIOUS Protein – Protein Powder – 4kg – Low Carb – Supports Lean Muscle Growth – Recovery Supplement - The Bulk Protein Company - 133 Servings (Banana)
20% OffFree Shipping
Why We Love It
- Promotes muscle growth and recovery.
- Tastes great with various recipes.
- Long lasting value pack.
Main Highlights
- ✅ 24g PROTEIN PER SERVING TO BUILD LEAN MUSCLE - A convenient way to help meet your daily protein needs. Use after training to quickly heal micro-tears in muscle tissues, speed up recovery and reduce muscle soreness for STRONGER and BIGGER muscles over time.
- ✅ HIGH PROTEIN, LOW CALORIES, LOW CARBS - Only 114 Calories Per Serving! Serious Protein powder is 80% Protein with Low Carbs, Sugars, and Fats. Ideal for adding LEAN MASS! Perfect to use as a meal replacement or part of a calorie-controlled diet, while trying to lean out, or for those simply looking to support MUSCLE GAINS.
- ✅ HIGH QUALITY INGREDIENTS - Premium blend of Whey Protein Concentrate, Micellar Casein and Soy Protein Isolate, a combination of slow and fast releasing proteins for total protein synthesis throughout the day. Also contains GLUTAMINE PEPTIDE, essential for muscle recovery and more bioavailable than regular glutamine, helping aid MUSCLE GROWTH.
- ✅ PROTEIN SHAKE THAT TASTES GREAT - Add 1 rounded scoop (30g) to 250ml of cold water or skimmed milk and shake well to create a great tasting Protein Shake! Can also be enjoyed in smoothies, with oats or when added to a pancake mix. For best results consume 1 serving (30g) one to three times per day
- ✅ EXCELLENT VALUE - More than 6 weeks supply in one tub, when following our recommended servings. Comes with scoop for measurements.
Show More
4
The Bulk Protein Company - Serious Gainz – Mass Gainer Protein Powder – Banana 5kg, B142-BA
The Bulk Protein Company
6% OffFree Shipping
Show More
The Bulk Protein Company
The Bulk Protein Company - Serious Gainz – Mass Gainer Protein Powder – Banana 5kg, B142-BA
6% OffFree Shipping
Why We Love It
- Optimal for muscle recovery and growth.
- Promotes mass gain efficiently.
- Amazing taste with variety.
Main Highlights
- 30g PROTEIN PER SERVING TO HELP BUILD MUSCLE - Protein Isolate powder that contains 30 grams of high quality Protein per serving. A convenient and easy way to help you meet your daily protein needs. Use after training to quickly heal micro-tears in muscle tissues, which speeds up recovery, reduces muscle soreness and leads to stronger and bigger muscles over time
- PUT ON SIZE AND GAIN MASS - With 468 lean calories per serving, Serious Gainz protein powder is ideal when BULKING. Use as part of a balanced diet to help add body mass and increase weight gain. Contains 81g of carbohydrates which will help your body absorb the protein within, turning it into muscle mass to help towards improving your overall body composition
- PROTEIN SHAKE THAT TASTES GREAT - Add 3 scoops of powder to 400-500ml of water or milk and mix well to create a great tasting Protein Shake! Can also be enjoyed in smoothies, with oats or when added to a pancake mix. Protein powders don't have to be boring, so we made 10 different flavours for you to choose from
- HIGH QUALITY WHEY PROTEIN - Whey digests quickly and is rich in branched-chain amino acids (BCAAs). One of these BCAAs, Leucine, plays a major role in promoting muscle growth and recovery after resistance and endurance exercise. When amino acids are digested and absorbed into your bloodstream, they become available for muscle protein synthesis, which is the creation of new muscle
- EXCELLENT VALUE 5kg TUB WITH 40 SERVINGS - With up to a month's supply of high quality protein powder, we offer great value for your money compared with other brands. We recommend one serving per day to consistently meet your daily protein goal. Consume immediately post-training on workout days and between breakfast and lunch on non-workout days. Comes with scooper for measurements
Show More
5
Optimum Nutrition Gold Standard Whey Protein, Muscle Building Powder with Naturally Occurring Glutamine and Amino Acids, Double Rich Chocolate, 29 Servings, 899 g, Packaging May Vary
Optimum Nutrition
18% OffFree Shipping
Show More
Optimum Nutrition
Optimum Nutrition Gold Standard Whey Protein, Muscle Building Powder with Naturally Occurring Glutamine and Amino Acids, Double Rich Chocolate, 29 Servings, 899 g, Packaging May Vary
18% OffFree Shipping
Why We Love It
- Supports muscle gain and recovery.
- Certified, low-sugar protein formula.
- Variety of sizes, flavors.
Main Highlights
- Optimum Nutrition’s Gold Standard 100% WHEY is the world’s best-selling protein powder* designed to support your fitness journey from day one.
- FAST-ABSORBING whey protein with whey protein isolate as the main ingredient helps with muscle gain and supports recovery* after every training session.
- The ON whey protein formula is Informed Choice certified, contains naturally-occurring BCAAs and GLUTAMINE and is LOW IN SUGAR and fat.
- Available in a VARIETY OF SIZES and FLAVOURS: double rich chocolate, banana cream, vanilla ice cream, unflavored protein powder and more.
- EASY & CONVENIENT: mix one scoop in 180-240 ml of cold water; best enjoyed in the morning or/and during the 30 minutes just before or immediately after training.
- *Source: Euromonitor International Limited; Consumer Health 2023 edition, Sports Protein Powder category, % retail value shares, 2022 data.
- ** Source EFSA Journal 2010;8(10):1811; 2011;9(6):2203.
Show More
6
USN Muscle Fuel Anabolic All-In-One Muscle Mass Gainer, Strawberry Flavour - 2kg, 54g Protein Powder, 5g Creatine Powder & 5g BCAA Powder For Maximum Muscle Growth, Post Workout Recovery Drink Mix
USN
20% OffFree Shipping
Show More
USN
USN Muscle Fuel Anabolic All-In-One Muscle Mass Gainer, Strawberry Flavour - 2kg, 54g Protein Powder, 5g Creatine Powder & 5g BCAA Powder For Maximum Muscle Growth, Post Workout Recovery Drink Mix
20% OffFree Shipping
Why We Love It
- High protein content ensures growth.
- Enhances physical performance substantially.
- Includes industry-leading nutrition formula.
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: Strawberry 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
Show More
7
Optimum Nutrition Serious Mass Protein Powder High Calorie Mass Gainer with Vitamins, Creatine and Glutamine, Strawberry, 8 Servings, 2.73 kg, Packaging May Vary
Optimum Nutrition
3% OffFree Shipping
Show More
Optimum Nutrition
Optimum Nutrition Serious Mass Protein Powder High Calorie Mass Gainer with Vitamins, Creatine and Glutamine, Strawberry, 8 Servings, 2.73 kg, Packaging May Vary
3% OffFree Shipping
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
Show More
8
SCI-MX Ultra Mass XL - 4kg - High Calorie Muscle Mass Protein Powder - Chocolate - Muscle Growth & Weight Gain • 60g Protein + 1088 Calories per Serving + 5g Creatine
SCI-MX
Show More
SCI-MX
SCI-MX Ultra Mass XL - 4kg - High Calorie Muscle Mass Protein Powder - Chocolate - Muscle Growth & Weight Gain • 60g Protein + 1088 Calories per Serving + 5g Creatine
Why We Love It
- Promotes muscle growth and recovery.
- Enhances strength for optimal workouts.
- Suitable for various fitness goals.
Main Highlights
- ⚡ FUEL YOUR MUSCLE GROWTH, WORKOUTS & RECOVERY WITH OUR ULTRA MASS. A scientifically developed high protein mass gainer formula for those looking to develop and maintain quality muscle. Multisource Carb Complex with 23 Essential Micronutrients & 5g Creatine Monohydrate per serving. Includes an impressive 60g of protein per serving, providing your body with the optimum and essential building blocks required for muscle growth and repair. Also available in Strawberry.
- 🏋️♂️ BENEFITS: This is a scientifically developed high protein mass gainer formula for those looking to develop and maintain quality muscle and meet calorie demands. Consuming sufficient calories for healthy weight gain made easy with carbs to provide your body with enough energy to workout and recover at your best. With an added 5g creatine which is proven to enhance your strength and power, allowing you to get the most out of your workouts. Suitable for Vegetarians.
- 🍦 HOW & WHEN TO USE: 6 x heaped scoops (300g) to 900-1200ml water. In the pursuit of achieving remarkable muscle development and conquering your weight gain goals, this is the perfect solution. Tailored to individuals facing the daunting challenge of consuming sufficient calories for healthy weight gain, this product stands as a beacon of promise. We only recommend 1 serving per day.
- 🧡 POWERING EVERY GOAL: Whether you want to build muscle, bulk, reduce body fat or peak your performance, our core focus is delicious, fitness-focused nutrition in the most fun and indulgent flavours. Our products are made to complement all types of training and performance goals – whether you’re a casual gym goer, an athlete or sportsperson, you can reap the benefits of our mouthwateringly delicious and flavoursome protein powders.
- ⭐ WHY SCI-MX: Our goal is to help nurture, support, and inspire the sportsperson in all of us. From recovery to competition training, there’s a SCI-MX product to help you achieve your goal. From high-quality protein powders, pre-workout and post-workout blends like creatine monohydrate to high-protein snacks such as flapjack bars, we've got you covered. Our no-nonsense approach to sports nutrition supplements guarantees you’ll always receive premium quality, great value products.
Show More
9
Myprotein Impact Whey Weight Gainer Protein (2.5kg (Pack of 1), Chocolate Smooth)
Myprotein
Free Shipping
Show More
Myprotein
Myprotein Impact Whey Weight Gainer Protein (2.5kg (Pack of 1), Chocolate Smooth)
Free Shipping
Why We Love It
- Promotes healthy weight gain.
- Provides high-quality protein.
- Convenient and redesigned packaging.
Main Highlights
- 31g of protein
- 50g of carbs
- 388 calories per serving
Show More
10
SCI-MX Pro-V Gain - 100% Vegan Chocolate Flavour Soy Protein Powder Isolate + B12 + Magnesium - Muscle Growth & Maintenance - Sugar Free, Non-GMO - 2.2KG (49 servings) 33g of protein per serving
SCI-MX
Free Shipping
Show More
SCI-MX
SCI-MX Pro-V Gain - 100% Vegan Chocolate Flavour Soy Protein Powder Isolate + B12 + Magnesium - Muscle Growth & Maintenance - Sugar Free, Non-GMO - 2.2KG (49 servings) 33g of protein per serving
Free Shipping
Why We Love It
- High-quality plant-based protein.
- Boosts energy decrease fatigue.
- Versatile usage possibilities.
Main Highlights
- WHAT'S IN THIS VEGAN CHOCOLATE PROTEIN POWDER: An advanced blend of non gmo soy protein isolate and cocoa powder. High levels of BCAAs, magnesium, vitamin B6 and vitamin B12, important for a non-dairy or vegan diet. Our protein is sugar free, and low in saturated fat at 33g protein per serving and 174 kcal per 45g serving. Allergens include SOY, GLUTEN, OATS. This product is made in a facility which also handles milk and egg
- BENEFITS: Packed with 33g of complete plant protein, 1.4g fat, and 6.8g carbs per serving, our plant-powered protein is a super-convenient way to get extra protein into your diet, helping you grow and maintain muscle, essential for any fitness goal. This vegan protein powder provides all 9 essential amino acids and is fortified for a plant-based diet packed with B6, B12, and Magnesium, all contributing to the reduction of fatigue and tiredness
- HOW and WHEN TO USE: This plant based protein powder is extremely versatile. Breakfast - Try adding a scoop or two to your porridge or pancakes for a healthy, high-protein start to the day. Alternatively, throw some fruit and peanut butter or almond butter into the mix for a nutritious smoothie, the perfect high-protein snack. 2. Post workout - Make a shake before andor after your session. Add 2 x level scoops (45g) with 300ml of cold water or oat milk to a protein shaker bottle, shake and enjoy
- POWERING EVERY GOAL: Whether you want to build muscle, bulk, reduce body fat or peak your performance, our core focus is on high-protein nutrition. Healthy, balanced, low in sugar, low in saturated fats. Our sports nutrition products are made to complement all types of training and performance goals – whether youâ€re a casual gym goer, an athlete or sportsperson. Get your PRO-V GAIN in a range of delicious flavours; Chocolate, Strawberry, Vanilla and Salted Caramel
- WHY SCI-MX: Our goal is to help nurture, support, and inspire the sportsperson in all of us. From recovery to competition training, thereâ€s a SCI-MX product to help you achieve your goal. From high-quality protein powders, pre-workout and post-workout blends like creatine monohydrate to high-protein snacks such as flapjack bars, we've got you covered. Our no-nonsense approach to sports nutrition supplements guarantees youâ€ll always receive premium quality, great value products
Show More