10 Best Whey Nutrition Protein Bulk in The UK

Last updated on 08/09/2025

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

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Why We Love It

Aids muscle growth and performance.
Supports muscle recovery process.
Great flavour variety available.

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

Optimum Nutrition Gold Standard 100% Whey Muscle Building and Recovery Protein Powder With Naturally Occurring Glutamine and BCAA Amino Acids, Chocolate Mint Flavour, 29 Servings, 899 g

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Why We Love It

Supports muscle gain and recovery.
Low in sugar and fat.
Versatile in sizes and 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

Bulk Hydrolysed Whey Protein Isolate, Protein Shake, Unflavoured, 2.5 g

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Why We Love It

Fast-absorbing whey protein formula.
High BCAA and protein content.
Minimal sugar and fat.

Main Highlights

A fast-absorbing whey protein formula
Packed with at least 24 g protein and 5 g BCAA per serving
This high-performing supplement absorbs faster than standard proteins, reaching your muscles in record time
With minimal sugar and fat, this is a winning formula for top-level training
Choose your flavour or keep it simple with Unflavoured

The Bulk Protein Company

The Bulk Protein Company - Serious Gainz – Mass Gainer Protein Powder – Banana 5kg, B142-BA

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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

Bulk Informed Whey Protein Isolate Powder, Protein Shake with Added Digestive Enzymes, Vanilla Ice Cream, 2.27 kg, Packaging May Vary

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Why We Love It

Elite athlete approved formula.
Advanced digestive enzyme blend.
Certified banned substance free.

Main Highlights

Advanced whey protein powder from Bulk, the sports and active nutrition brand for everyone
The most advanced protein shake from Bulk created for elite athletes and serious trainers
mTOR whey complex (24g protein per serving) - a blended formula of Pure Whey Isolate 90 (65%) and Pure Whey Protein (35%)
With active ingredients DigeZyme digestive enzymes, LactoSpore and glutamine peptides
Banned substance tested under Informed Sport programme, giving absolute assurance that this is safe to use in professional sporting environments

Bulk Pure Whey Protein Powder Shake, Chocolate, 1 kg, Packaging May Vary

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Why We Love It

Award-winning shake for daily training.
Packed with essential proteins and BCAAs.
Sourced from European, grass-fed cows.

Main Highlights

Delivers 22g or 23g of high-quality protein per serving (depending on flavour), sourced from premium whey protein concentrate to support your daily nutrition and fitness goals.
A complete protein source containing all essential amino acids, including 5g of naturally occurring BCAAs per scoop. Ideal for muscle maintenance.
Designed to mix easily with water or milk, creating a smooth and enjoyable shake. Low in sugar making it suitable for various nutrition plans.
Available in over 20 delicious flavours and multiple pack sizes including 500g, 1kg, 2.5kg and 5kg, making it easy to find the right option to match your taste and usage needs.
Manufactured to high quality standards and suitable for vegetarian diets. A reliable protein source for athletes, gym-goers, or anyone looking to boost their protein intake.

Amazon Brand - Amfit Nutrition Whey Protein Powder, Chocolate Hazelnut Flavour, 33 Servings, 1 kg (Pack of 1)

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Why We Love It

Great for muscle growth maintenance.
Backed by reputable scientific verification.
Environmentally-friendly recycled packaging.

Main Highlights

PBN Whey Protein Powder Chocolate Hazelnut 1kg Pouch
Each serving contains 23.0g of Protein
Premium Quality ingredients
Suitable for Vegetarians
Each Pack contains 33 Servings
Item display weight: 1.0 kilograms

At least 24g protein per serving.
Low in sugar and fat.
Comes in delicious flavors.

Main Highlights

Each serving provides 24–26g of ultra-filtered whey protein isolate, delivering a high-quality source of protein to support muscle growth, repair, and lean muscle maintenance.
Formulated with minimal sugars and carbohydrates, this whey isolate is ideal for those following low-carb or high-protein diets, helping you fuel your body efficiently without unnecessary additives.
This protein powder is suitable for vegetarian diets, providing a clean, pure protein source to fit your lifestyle.
Designed to dissolve quickly and smoothly in water or milk, available in a range of delicious flavours that make it easy and enjoyable to meet your daily protein needs.
Whether it’s pre-workout, post-workout, or a convenient protein boost during the day, Bulk Pure Whey Isolate 90 supports your nutrition goals and active lifestyle.

Refreshing fruity drink alternative.
High protein content.
Fast absorption rate.

Main Highlights

Provides 20g of fast-absorbing whey protein isolate per serving, delivering essential amino acids to support muscle growth, repair, and lean muscle maintenance.
Crafted with low sugar content and just 86 calories per serving, making it ideal for those following calorie-controlled or balanced nutrition plans.
Available in a range of naturally inspired fruity flavours that provide a refreshing and enjoyable alternative to traditional protein shakes.
Formulated to mix quickly and smoothly with water, this hydrating protein drink is perfect for on-the-go nutrition and supports post-workout hydration needs.
Perfect for pre- or post-workout supplementation or as a convenient protein boost throughout the day, helping you stay on track with your fitness and wellness goals.

Award-winning protein for training.
High protein and BCAAs boost.
Low sugar for healthy choices.

Main Highlights

Delivers 22g or 23g of high-quality protein per serving (depending on flavour), sourced from premium whey protein concentrate to support your daily nutrition and fitness goals.
A complete protein source containing all essential amino acids, including 5g of naturally occurring BCAAs per scoop. Ideal for muscle maintenance.
Designed to mix easily with water or milk, creating a smooth and enjoyable shake. Low in sugar making it suitable for various nutrition plans.
Available in over 20 delicious flavours and multiple pack sizes including 500g, 1kg, 2.5kg and 5kg, making it easy to find the right option to match your taste and usage needs.
Manufactured to high quality standards and suitable for vegetarian diets. A reliable protein source for athletes, gym-goers, or anyone looking to boost their protein intake.

9.0

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We scanned 665 products

We reviewed these offers relevant to the Whey Nutrition Protein Bulk 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, Bulk, The Bulk Protein Company, Amfit Nutrition, all of which have a reputation for consistently delivering high-quality products that users love and innovative approaches for function & design.

For the best Whey Nutrition Protein Bulk in the market, we considered we took a deep dive into 3326 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 High Calorie Mass Gainer with Vitamins, Creatine and Glutamine, Cookies and Cream, 8 Servings, 2.73 kg, Packaging May Vary. We love many things about this product by Optimum Nutrition. What sets it apart from the competition is Aids muscle growth and performance, Supports muscle recovery process, Great flavour variety available.
The best value product for most shoppers and where user satisfaction is continuously the highest is Optimum Nutrition Gold Standard 100% Whey Muscle Building and Recovery Protein Powder With Naturally Occurring Glutamine and BCAA Amino Acids, Chocolate Mint Flavour, 29 Servings, 899 g by Optimum Nutrition based on online reviews by bloggers, experts and online shoppers.
The biggest bargain at the moment for Whey Nutrition Protein Bulk and the best cost-to-value ratio is Optimum Nutrition Gold Standard 100% Whey Muscle Building and Recovery Protein Powder With Naturally Occurring Glutamine and BCAA Amino Acids, Chocolate Mint Flavour, 29 Servings, 899 gat Optimum Nutrition with a 18% discount.
Our list of the best Whey Nutrition Protein Bulk 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 Whey Nutrition Protein Bulk in The UK

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We scanned 665 products

We concluded that: