10 Best Isopure Protein Powder in The UK

Last updated on 15/08/2025

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SERIOUS PROTEIN – Protein Powder – 4kg – Low Carb – Supports Lean Muscle Growth – Recovery Supplement - The Bulk Protein Company - 133 Servings (Chocolate)

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Why We Love It

Aids in muscle growth.
Low calorie protein source.
Great taste, excellent value.

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.

Dymatize ISO 100 Hydrolyzed Gourmet Chocolate 932g - Whey Protein Hydrolysat + Isolat Pulver

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Why We Love It

Promotes lean and powerful physique.
Effortless to digest due to enzymatic hydrolysis.
Suitable for vegetarians, gluten-free.

Main Highlights

THE TOP-QUALITY RECIPE of our whey isolate protein powder delivers 25 g of the highest-quality protein per serving with BCAAs and L-leucine, making it both gluten free and suitable for vegetarians
HYDROLYSIS breaks the whey protein isolate into smaller amino acid chains, which makes it exceptionally quick to absorb and the perfect choice before or after training
THE FAT AND SUGAR-FREE protein powder contains less than 116 calories per serving (mixed with water), making it perfect for athletes who are optimising both their protein and calorie intakes
ACCORDING TO INFORMED CHOICE, every substance in the iso whey protein powder is of the highest standard, so athletes can rest easy knowing their product is top quality, especially during competitions
WINNER OF the isolate of the year award from 2013 to 2017, our ISO 100 premium protein powder meets the highest quality standards and is the perfect protein supplement before and after training

Optimum Nutrition ON Gold Standard 100% Isolate Pure Whey Protein, Naturally Occurring BCAAs and Glutamine, Pre and Post Workout, Chocolate Flavour, 31 Servings, 930 g

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Why We Love It

Supports lean muscle gain.
Ultra-filtered for exceptional purity.
Perfect for workout recovery.

Main Highlights

Gold Standard whey protein powder contains 25g (83%) of high quality 100% pure whey isolate protein blend per serving to suport lean muscle gain*
Whey protein isolate is ultra-filtered for exceptional purity; it supports the growth and maintenance of muscle mass & the maintenance of normal bones*
Informed Choice certified ON whey protein powder contains low sugar (0.3 g), low fat (0.4 g) and 5.5 g of naturally occurring essential amino acids, BCAAs, per serving
This high protein powder is perfect as a protein shake, pre workout and post workout for both men and women; comes in vanilla, chocolate and strawberry flavours
To create perfect protein drinks, add 30 g (1 rounded scoop) to 200 ml of cold water and mix well

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

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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.

Optimum Nutrition Gold Standard 100% Whey Muscle Building and Recovery Protein Powder With Naturally Occurring Glutamine and BCAA Amino Acids, Double Rich Chocolate Flavour, 73 Servings, 2.26 kg

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Why We Love It

Supports fitness journey from start.
Assists in muscle gain, recovery.
Variety of flavors available.

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

Applied Nutrition Critical Whey Protein Powder 2kg - High Protein Powder, Protein Milkshake, Muscle Building Supplement with BCAAs & Glutamine (2kg - 67 Servings) (White Choco Bueno)

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Why We Love It

Promotes muscle building and maintenance.
Quick and easy preparation.
Assures highest quality for athletes.

Main Highlights

BUILD & MAINTAIN MUSCLE: Applied Nutrition protein powder is an excellent way to build up your muscles when you do strength training. Protein is an essential part of your diet to help maintain muscle mass, so drinking the shake as recommended will help you to retain your muscle development.
EASY TO PREPARE: This high protein powder mixes incredibly well with water or low-fat milk. You can shake it up when you are running late or on the go in no time.
TESTED FOR ATHLETES: Every ingredient within this product is carefully selected and monitored through our quality management system to bring you the highest level of assurance. Final products are produced and packaged in an ISO 22000, BRC, GMP and Halal accredited laboratory.
VARIETY OF FANTASTIC FLAVOURS: You can pick from multiple available flavours for your protein milkshake. Never again will you have to drink tasteless protein supplements.
GREAT SOURCE OF PROTEIN: Applied Nutrition Critical Whey powder is a wonderful source of protein. The combination of Whey Protein Concentrate, Whey Protein Isolate and Hydrolysed Whey Protein makes the perfect muscle building supplement.

Isopure Unflavoured Whey Protein Isolate Powder, High in Protein with 25 g per Serve, Low in Sugar, No Artificial Flavours or Sweeteners, Made with Only 2 Ingredients, 435 g

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Why We Love It

Pure ingredients for pure nutrition.
High protein to fuel your day.
Versatile for any recipe.

Main Highlights

MADE WITH INGREDIENTS YOU NEED, NOTHING YOU DON'T: Only 2 ingredients, including 100% pure whey protein isolate because when it comes to looking and feeling good, LESS IS MORE
25 G HIGH PROTEIN PER SERVING: Delivers 25g protein from 100% Whey Protein Isolate to complement your daily routine and support your protein intake
LOW SUGAR AND LOW FAT: Isopure Unflavoured Whey Isolate delivers high-quality protein with minimal sugar and fat - an effortless way to boost your intake without unecessary extras
NO ARTIFICIAL FLAVOURS OR SWEETENERS*: Enjoy an unflavoured protein powder with simple ingredients and no artificial flavours, just great-tasting nutrition
EASY TO BLEND, BAKE, OR COOK: Blend into smoothies, use in baking to make protein brownies, or add to recipes for a protein-rich meal; however you take it, Isopure Whey Protein Isolate fits effortlessly into your lifestyle; *Contains Steviol Glycosides from Stevia, with no artificial sweeteners

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

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Why We Love It

Award-winning protein shake for training.
Packed with nutrients and protein.
Low-fat, low-sugar delicious flavours.

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

Myprotein Clear Whey Isolate Orange Mango, 522 g

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Why We Love It

Light, refreshing and protein-rich.
Packed with BCAAs and glutamine.
Zero guilt, low-calorie hydration.

Main Highlights

Light and refreshing. Ideal product in the protein supplements category for warmer weather due to the juice-like flavour and consistency - no milky taste or texture
Fruity flavours mean the product tastes great, but it also contains 20g of protein per serving, along with 4g BCAAs and 3g of glutamine; making this one of the most complete clear whey drinks around
Clear Whey Isolate is not just another protein shake. With high-quality hydrolysed whey protein isolate and a light and refreshing alternative — this is more like juice than a milky protein shake.
Clear Whey from Myprotein is Informed Choice certified. With Informed Choice, you can feel confidentthat ourClear Whey Isolateis manufactured to the highest standards.
With just 0.1g of fat, 0.3g of sugar, and less than 90 calories per shake, it’s the perfect way to stay hydrated throughout the day — without undoing all of your hard work.

MyProtein Impact Whey Protein Powder – Vanilla Flavour– 1kg, 22g of Protein per Serving, Supports Muscle Building, Recovery & Lean Muscle Maintenance - 33 Servings

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Why We Love It

Great protein to calorie ratio.
Quality assured by Labdoor.
Incredible flavor variety.

Main Highlights

High-Quality Protein Source: Delivers 23g of premium protein per serving, helping to fuel your muscles and support your fitness goals with each shake.
Low-Calorie & Nutrient-Rich: Only 114 calories per serving, with just 1.9g of fat and 1.8g of carbs, making it a perfect choice for those who want to boost their protein intake without excess calories.
Rich in Essential Amino Acids: Includes essential amino acids and BCAAs, crucial for muscle recovery and growth, providing the nutrients your body needs to repair and build muscle.
Wide Variety of Flavours: Over 40 delicious flavours to choose from, including popular favourites like Chocolate Brownie, Cookies & Cream, and Peach Tea, ensuring you never get bored of your protein shake.
Informed Choice Certified: Backed by Informed Choice certification, giving you confidence that this product is regularly tested and free from banned substances, meeting global sports nutrition quality standards.

8.9

Excellent

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We scanned 169 products

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

For the best Isopure Protein Powder in the market, we considered we took a deep dive into 846 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 SERIOUS PROTEIN – Protein Powder – 4kg – Low Carb – Supports Lean Muscle Growth – Recovery Supplement - The Bulk Protein Company - 133 Servings (Chocolate). We love many things about this product by The Bulk Protein Company. What sets it apart from the competition is Aids in muscle growth, Low calorie protein source, Great taste, excellent value.
The best value product for most shoppers and where user satisfaction is continuously the highest is Dymatize ISO 100 Hydrolyzed Gourmet Chocolate 932g - Whey Protein Hydrolysat + Isolat Pulver by Dymatize based on online reviews by bloggers, experts and online shoppers.
The biggest bargain at the moment for Isopure Protein Powder and the best cost-to-value ratio is 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 Varyat Optimum Nutrition with a 25% discount.
Our list of the best Isopure Protein Powder 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 Isopure Protein Powder in The UK

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We scanned 169 products

We concluded that: