10 Best Bulk Powders Mass Gainer in The UK

Last updated on 08/08/2025
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Best Choice
1
9.7
Exceptional
Bulk Informed Mass, Mass Gainer, Whey Protein Shake, Strawberries and Cream, 3 kg, Packaging May Vary
Bulk
Bulk Informed Mass, Mass Gainer, Whey Protein Shake, Strawberries and Cream, 3 kg, Packaging May Vary
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Why We Love It
  • Perfect for high-performing athletes.
  • Boosts physical performance with creatine.
  • Delicious flavours available.
Main Highlights
  • A premium mass gainer formula made for high-performing athletes
  • Powered by 45 g protein (using our exclusive mTOR protein complex) and 75 g carbohydrates per serving
  • Contains creatine, which increases physical performance during successive bursts of short-term, high-intensity exercise; The beneficial effect is obtained with a daily intake of 3 g of creatine
  • Perfect for elite trainers, this advanced formula provides over 550 kcal per serving
  • Available in a range of delicious flavours, this is your perfect training partner
9.7
Exceptional
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Best Value
2
9.6
Superb
Bulk Informed Mass, Mass Gainer, Whey Protein Shake, Vanilla Ice Cream, 3 kg, Packaging May Vary
Bulk
Bulk Informed Mass, Mass Gainer, Whey Protein Shake, Vanilla Ice Cream, 3 kg, Packaging May Vary
Free Shipping
Why We Love It
  • High-performing athletes love it.
  • Delicious flavors available.
  • Increases physical performance effectively.
Main Highlights
  • A premium mass gainer formula made for high-performing athletes
  • Powered by 45 g protein (using our exclusive mTOR protein complex) and 75 g carbohydrates per serving
  • Contains creatine, which increases physical performance during successive bursts of short-term, high-intensity exercise; The beneficial effect is obtained with a daily intake of 3 g of creatine
  • Perfect for elite trainers, this advanced formula provides over 550 kcal per serving
  • Available in a range of delicious flavours, this is your perfect training partner
9.6
Superb
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3
9.4
Superb
Save 18%
The Bulk Protein Company - Serious Gainz – Mass Gainer Protein Powder – Banana 5kg, B142-BA
The Bulk Protein Company
The Bulk Protein Company - Serious Gainz – Mass Gainer Protein Powder – Banana 5kg, B142-BA
18% 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
9.4
Superb
Save 18%
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4
9.4
Superb
Save 11%
Optimum Nutrition Serious Mass Protein Powder High Calorie Mass Gainer with Vitamins, Creatine and Glutamine, Vanilla, 8 Servings, 2.73 kg, Packaging May Vary
Optimum Nutrition
Optimum Nutrition Serious Mass Protein Powder High Calorie Mass Gainer with Vitamins, Creatine and Glutamine, Vanilla, 8 Servings, 2.73 kg, Packaging May Vary
11% OffFree Shipping
Why We Love It
  • Boosts muscle growth and performance.
  • Supports muscle recovery effectively.
  • Delicious variety of flavours.
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
  • 250 g+ CARBOHYDRATES per serving
  • 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
9.4
Superb
Save 11%
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5
9.3
Superb
Bulk Vegan Mass Gainer, Protein Powder, Strawberry, 2.5 kg, Packaging May Vary
Bulk
Bulk Vegan Mass Gainer, Protein Powder, Strawberry, 2.5 kg, Packaging May Vary
Free Shipping
Why We Love It
  • Plant-based alternative to mass gainers.
  • High protein content promotes growth.
  • Enhances digestion with enzyme inclusion.
Main Highlights
  • A plant-based alternative that is a simple switch from regular mass gainer supplements
  • Powered by 30 g protein, using our premium V+ protein blend
  • Containing digestive enzymes to help break down protein, carbohydrates and fat
  • Perfect for maintaining muscle growth on a vegan training diet; High in protein which contributes to the growth and maintenance of muscle mass
  • Available in a range of delicious flavours, this is your perfect training partner
9.3
Superb
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6
9.1
Superb
Bulk Informed Mass, Mass Gainer, Whey Protein Shake, Double Chocolate, 3 kg, Packaging May Vary
Bulk
Bulk Informed Mass, Mass Gainer, Whey Protein Shake, Double Chocolate, 3 kg, Packaging May Vary
Free Shipping
Why We Love It
  • Promotes performance in high-intensity workouts.
  • Designed for elite athletes' needs.
  • Range of delicious flavors available.
Main Highlights
  • A premium mass gainer formula made for high-performing athletes
  • Powered by 45 g protein (using our exclusive mTOR protein complex) and 75 g carbohydrates per serving
  • Contains creatine, which increases physical performance during successive bursts of short-term, high-intensity exercise; The beneficial effect is obtained with a daily intake of 3 g of creatine
  • Perfect for elite trainers, this advanced formula provides over 550 kcal per serving
  • Available in a range of delicious flavours, this is your perfect training partner
9.1
Superb
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7
8.9
Excellent
Bulk Vegan Mass Gainer, Protein Powder, Banana Caramel, 2.5 kg, Packaging May Vary
Bulk
Bulk Vegan Mass Gainer, Protein Powder, Banana Caramel, 2.5 kg, Packaging May Vary
Free Shipping
Why We Love It
  • Simple switch from mass gainers.
  • High in muscle-maintaining protein.
  • Delicious flavors for every workout.
Main Highlights
  • A plant-based alternative that is a simple switch from regular mass gainer supplements
  • Powered by 30 g protein, using our premium V+ protein blend
  • Containing digestive enzymes to help break down protein, carbohydrates and fat
  • Perfect for maintaining muscle growth on a vegan training diet; High in protein which contributes to the growth and maintenance of muscle mass
  • Available in a range of delicious flavours, this is your perfect training partner
8.9
Excellent
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8
8.7
Excellent
Save 12%
Optimum Nutrition Serious Mass Protein Powder with Creatine, Glutamine, 25 Vitamins and Minerals, Strawberry Flavour, 16 Servings, 5.45KG
Optimum Nutrition
Optimum Nutrition Serious Mass Protein Powder with Creatine, Glutamine, 25 Vitamins and Minerals, Strawberry Flavour, 16 Servings, 5.45KG
12% OffFree Shipping
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
8.7
Excellent
Save 12%
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9
8.7
Excellent
XL Nutrition Xtra Mass 5.2kg Mass Gainer - Serious Mass Protein Powder - 50g Protein, 1000 Calories, Creatine Monohydrate, BCAA, Glutamine - 20 Servings, Strawberry Flavour
XL Nutrition
XL Nutrition Xtra Mass 5.2kg Mass Gainer - Serious Mass Protein Powder - 50g Protein, 1000 Calories, Creatine Monohydrate, BCAA, Glutamine - 20 Servings, Strawberry Flavour
Why We Love It
  • Packed with 1000 extra calories.
  • Enriched with 172g carbohydrates.
  • Boosted with 50g protein.
Main Highlights
  • Extra calories for muscle growth: This weight gainer provides 1000 calories per serving, ideal for those seeking serious mass protein powder options. It offers a convenient shake alternative to meet your caloric intake goals efficiently.
  • Carbs for energy: With 172g of carbs per serving, this weight gain protein powder supports your body's energy needs. It's a key component in our mass protein powder, fueling your workouts and aiding digestion.
  • High protein content: Delivering 50g per serving, this is the best protein powder for muscle gain. It supports muscle repair and growth, making it an essential part of any bulking protein powder regimen.
  • Enriched with BCAA's and glutamimne: Loaded with BCAAs and glutamine, this 5kg protein powder helps reduce muscle soreness and fatigue, supporting muscle gain and recovery post-workout. It's a top choice for serious mass.
  • Creatine for stregnth: Added creatine mono hydrate makes this bulk pure whey protein powder perfect for doubling your strength and lean muscle gains, enhancing the effectiveness of your gym protein powder routine.
8.7
Excellent
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10
8.7
Excellent
Bulk Mass Gainer, Protein Shake for Weight Gain, Cinnamon Cereal Milk, 2.5 kg
Bulk
Bulk Mass Gainer, Protein Shake for Weight Gain, Cinnamon Cereal Milk, 2.5 kg
Free Shipping
Why We Love It
  • Serious bulking made easy.
  • Packed with essential proteins.
  • Gain muscle mass effectively.
Main Highlights
  • Packaging May Vary
  • Our most popular weight gain formula designed for serious bulking
  • Powered by 40 g protein, 66 g carbohydrates and over 500 kcal per serving
  • Contains a combination of fast and slow-release proteins
  • Perfect for dedicated trainers looking to promote weight gain; High in protein which contributes to the growth of muscle mass
8.7
Excellent
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