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Best Whey Protein Isolate Powder of 2026
Last updated on 01/04/2026
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1
Optimum Nutrition Platinum Hydro Whey, Hydrolysed Whey Protein Isolate Powder with Essential Amino Acids, Glutamine and BCAA, Milk Chocolate Flavour, 40 Servings, 1.6 kg
Optimum Nutrition
6% Off
Why we love it
Supports your active fitness routine.
Low in sugars and fat.
Easy to mix formula.
Main Highlights
OPTIMUM NUTRITION PLATINUM HYDROWHEY - ADVANCED HYDROLYSED WHEY PROTEIN ISOLATES – Contains 30 g of the fastest digesting protein available
ANY-TIME FORMULA – great before or after exercise, between meals, with a meal, or any time of day where you need extra protein in your nutrition
8.8 g of naturally occurring and added BCAAs
EASY MIXING
THE MOST ADVANCED WHEY PROTEIN FROM ON
LOW in FAT: 0.3 g – 0.4 g, per serving
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9.7
Exceptional
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9.7
Exceptional
Optimum Nutrition
Optimum Nutrition Platinum Hydro Whey, Hydrolysed Whey Protein Isolate Powder with Essential Amino Acids, Glutamine and BCAA, Milk Chocolate Flavour, 40 Servings, 1.6 kg
6% Off
Check Price
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Why we love it
Supports your active fitness routine.
Low in sugars and fat.
Easy to mix formula.
Main Highlights
OPTIMUM NUTRITION PLATINUM HYDROWHEY - ADVANCED HYDROLYSED WHEY PROTEIN ISOLATES – Contains 30 g of the fastest digesting protein available
ANY-TIME FORMULA – great before or after exercise, between meals, with a meal, or any time of day where you need extra protein in your nutrition
8.8 g of naturally occurring and added BCAAs
EASY MIXING
THE MOST ADVANCED WHEY PROTEIN FROM ON
LOW in FAT: 0.3 g – 0.4 g, per serving
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Value for Money
2
DY Nutrition - Shadowhey Isolate 100% Whey Protein Powder 2kg | 25g Protein per Serving | 66 Servings | 7.3g of BCAAs | Cold Processing Filtered | Premium Absorption Lactose Free (Vanilla Caramel)
DY Nutrition
Why we love it
Pure, high-quality protein intake.
Awarded Best Protein Powder.
Promotes lean muscle mass.
Main Highlights
Pure Cold Pressed Whey Protein Isolate: DY Nutrition Shadowhey Isolate contains 25 grams of 100% pure, cold-processed whey protein isolate for maximum bioavailability. Cold processing filtration helps preserve the proteins Amino acid profile, producing the highest quality protein available.
Why Isolate? When compared against the other whey protein types (concentrate and Hydrolysate) whey protein isolate has the highest amount of protein per serving. Whey isolate is considered to be lactose free, carbohydrate free, and fat free, making it a perfect choice for performance athletes and people looking to add lean muscle mass.
Decades of Proven Performance: Whey protein has a legacy of effectiveness in sports research spanning decades and Shadowhey Isolate Protein Powder has been specifically designed for rapid absorption delivering an industry leading 25g of protein per 30g scoop with over 7.3g of Branch chain amino acids and all nine essential amino acids.
Easy Mixing, Optimal Absorption: Our DY Nutrition Shadowhey Isolate is 100% pure, sugar free, lactose free and highly bioavailable. It comes in 7 premium flavours and mixes effortlessly into your pre or post-workout shake. It's also perfect as a base for any other homemade high protein recipes such as overnight oats, pancakes and flapjacks.
Award Winning, Quality Assured & GMP Certified: Rest easy knowing our Shadowhey Isolate protein powder is produced to the highest quality standards and GMP certified. In fact, Shadowhey Isolate was even awarded as Winner by Men's Fitness UK for the Best Protein Powder at the 2022 Nutrition awards.
Dorian Yates Approved: Formulated by bodybuilding legend and six-time Mr Olympia, Dorian Yates. “Whey isolate is the bodybuilder’s go-to source for high quality, rapidly-digested protein in its purest form. Shadow Whey Isolate is exactly what you’d expect: a microfiltered source of whey isolate, with minimal fat and no sugar. If you’re after the finest quality whey isolate, Shadowhey is your answer” Dorian Yates
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9.5
Superb
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9.5
Superb
DY Nutrition
DY Nutrition - Shadowhey Isolate 100% Whey Protein Powder 2kg | 25g Protein per Serving | 66 Servings | 7.3g of BCAAs | Cold Processing Filtered | Premium Absorption Lactose Free (Vanilla Caramel)
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Why we love it
Pure, high-quality protein intake.
Awarded Best Protein Powder.
Promotes lean muscle mass.
Main Highlights
Pure Cold Pressed Whey Protein Isolate: DY Nutrition Shadowhey Isolate contains 25 grams of 100% pure, cold-processed whey protein isolate for maximum bioavailability. Cold processing filtration helps preserve the proteins Amino acid profile, producing the highest quality protein available.
Why Isolate? When compared against the other whey protein types (concentrate and Hydrolysate) whey protein isolate has the highest amount of protein per serving. Whey isolate is considered to be lactose free, carbohydrate free, and fat free, making it a perfect choice for performance athletes and people looking to add lean muscle mass.
Decades of Proven Performance: Whey protein has a legacy of effectiveness in sports research spanning decades and Shadowhey Isolate Protein Powder has been specifically designed for rapid absorption delivering an industry leading 25g of protein per 30g scoop with over 7.3g of Branch chain amino acids and all nine essential amino acids.
Easy Mixing, Optimal Absorption: Our DY Nutrition Shadowhey Isolate is 100% pure, sugar free, lactose free and highly bioavailable. It comes in 7 premium flavours and mixes effortlessly into your pre or post-workout shake. It's also perfect as a base for any other homemade high protein recipes such as overnight oats, pancakes and flapjacks.
Award Winning, Quality Assured & GMP Certified: Rest easy knowing our Shadowhey Isolate protein powder is produced to the highest quality standards and GMP certified. In fact, Shadowhey Isolate was even awarded as Winner by Men's Fitness UK for the Best Protein Powder at the 2022 Nutrition awards.
Dorian Yates Approved: Formulated by bodybuilding legend and six-time Mr Olympia, Dorian Yates. “Whey isolate is the bodybuilder’s go-to source for high quality, rapidly-digested protein in its purest form. Shadow Whey Isolate is exactly what you’d expect: a microfiltered source of whey isolate, with minimal fat and no sugar. If you’re after the finest quality whey isolate, Shadowhey is your answer” Dorian Yates
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3
PINK SUN Whey Protein Isolate Powder Unflavoured 1kg (92% Protein) Soy Free Grass Fed Gluten Free No Additives Vegetarian Undenatured Non GM Unsweetened Natural Whey UK 1000g
PINK SUN
Why we love it
Premium quality ensures exceptional results.
Suitable for many diets.
Ultra-filtered for pure protein.
Main Highlights
Premium quality, SOY FREE, undenatured whey protein isolate powder 1kg
From grass-fed hormone-free cows' milk with 92% protein
Ultra-filtered to remove carbohydrate, fat and lactose
Unflavoured natural taste - no added sugar or artificial sweeteners
Gluten free, suitable for vegetarian and wholefood diets
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9.4
Superb
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9.4
Superb
PINK SUN
PINK SUN Whey Protein Isolate Powder Unflavoured 1kg (92% Protein) Soy Free Grass Fed Gluten Free No Additives Vegetarian Undenatured Non GM Unsweetened Natural Whey UK 1000g
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Why we love it
Premium quality ensures exceptional results.
Suitable for many diets.
Ultra-filtered for pure protein.
Main Highlights
Premium quality, SOY FREE, undenatured whey protein isolate powder 1kg
From grass-fed hormone-free cows' milk with 92% protein
Ultra-filtered to remove carbohydrate, fat and lactose
Unflavoured natural taste - no added sugar or artificial sweeteners
Gluten free, suitable for vegetarian and wholefood diets
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4
Applied Nutrition Critical Whey Protein Powder – 24g Protein per Serving, High Protein Powder, Protein Shake with BCAAs & Glutamine Packaging May Vary (2Kg - 61 Servings) (White Choco Hazelnut)
Applied Nutrition
17% Off
Why we love it
Promotes muscle building and maintenance.
Quick and easy preparation.
Assures highest quality for athletes.
Main Highlights
24G PROTEIN PER SERVING - Critical Whey delivers 24g of high-quality protein per shake to support lean muscle growth, repair, and recovery as part of your fitness journey.
ADVANCED WHEY BLEND - A fast absorbing formula made with whey protein concentrate, isolate, and hydrolysed whey for both rapid and sustained release protein.
RICH IN BCAAs & GLUTAMINE - Naturally high in essential amino acids to aid recovery, reduce fatigue, and support endurance.
INFORMED TESTED FOR QUALITY - Every flavour is Informed Protein Tested, with selected flavours (Strawberry Milkshake, Chocolate Milkshake, Vanilla Ice Cream) also Informed Sport Certified for athletes.
CAFFEINE FLAVOURS AVAILABLE - Caramel Latte and Frappuccino combine 24g protein with added caffeine for extra focus and energy - perfect for mornings or busy days.
DELICIOUS & EASY TO MIX – Available in a wide range of great-tasting flavours, each 825g tub provides 25 smooth, easy-mixing shakes for convenient daily protein support.
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9.3
Superb
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9.3
Superb
Applied Nutrition
Applied Nutrition Critical Whey Protein Powder – 24g Protein per Serving, High Protein Powder, Protein Shake with BCAAs & Glutamine Packaging May Vary (2Kg - 61 Servings) (White Choco Hazelnut)
17% Off
Check Price
Show More
Why we love it
Promotes muscle building and maintenance.
Quick and easy preparation.
Assures highest quality for athletes.
Main Highlights
24G PROTEIN PER SERVING - Critical Whey delivers 24g of high-quality protein per shake to support lean muscle growth, repair, and recovery as part of your fitness journey.
ADVANCED WHEY BLEND - A fast absorbing formula made with whey protein concentrate, isolate, and hydrolysed whey for both rapid and sustained release protein.
RICH IN BCAAs & GLUTAMINE - Naturally high in essential amino acids to aid recovery, reduce fatigue, and support endurance.
INFORMED TESTED FOR QUALITY - Every flavour is Informed Protein Tested, with selected flavours (Strawberry Milkshake, Chocolate Milkshake, Vanilla Ice Cream) also Informed Sport Certified for athletes.
CAFFEINE FLAVOURS AVAILABLE - Caramel Latte and Frappuccino combine 24g protein with added caffeine for extra focus and energy - perfect for mornings or busy days.
DELICIOUS & EASY TO MIX – Available in a wide range of great-tasting flavours, each 825g tub provides 25 smooth, easy-mixing shakes for convenient daily protein support.
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5
Optimum Nutrition ON Gold Standard 100% Isolate Pure Whey Protein, Naturally Occurring BCAAs and Glutamine, Pre and Post Workout, Vanilla Flavour, 31 Servings, 930 g
Optimum Nutrition
13% Off
Why we love it
High in quality whey protein.
Support muscle growth and maintenance.
Low in sugar and fat.
Main Highlights
Gold Standard whey protein powder contains 25g (83 percent) of high quality 100 percent 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 and 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
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9.2
Superb
Check Price
9.2
Superb
Optimum Nutrition
Optimum Nutrition ON Gold Standard 100% Isolate Pure Whey Protein, Naturally Occurring BCAAs and Glutamine, Pre and Post Workout, Vanilla Flavour, 31 Servings, 930 g
13% Off
Check Price
Show More
Why we love it
High in quality whey protein.
Support muscle growth and maintenance.
Low in sugar and fat.
Main Highlights
Gold Standard whey protein powder contains 25g (83 percent) of high quality 100 percent 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 and 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
Show More
6
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
Optimum Nutrition
13% Off
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
Show More
9.1
Superb
Check Price
9.1
Superb
Optimum Nutrition
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
13% Off
Check Price
Show More
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
Show More
7
Myprotein Impact Whey Protein Powder | 22g Premium Protein Per Serving | Builds Lean Muscle & Aids Recovery | Vanilla 1KG | Vegetarian Low Fat & Carbs | Trusted by Athletes
Myprotein
Why we love it
Great protein to calorie ratio.
Quality assured by Labdoor.
Incredible flavor variety.
Main Highlights
Build, Recover, Repeat – Packed with 22g of high-quality whey protein per serving, Impact Whey Protein fuels muscle growth, maintenance, and recovery, helping you stay one step ahead of your goals
Clean, Certified, Trusted – With Informed Choice certification, every scoop is independently tested for purity, giving athletes confidence in every sip. No hidden nastiest—just premium quality protein you can trust
Leaner Gains, No Extra Baggage – With just 114 calories, 1.9g of fat, and 1.8g of carbs per serving, this is high-protein nutrition without the unnecessary extras, keeping your goals on track
Power Up Your Recovery – Each serving delivers 5g of naturally occurring BCAAs, essential for muscle repair and reducing post-workout soreness, so you can train harder, recover faster, and come back stronger
From The UK’s No.1 Protein Brand – Trusted by millions worldwide, Impact Whey Protein has been a bestseller for over 20 years. Designed by expert nutritionists, it’s the protein choice for elite athletes and everyday fitness enthusiasts alike
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9.1
Superb
Check Price
9.1
Superb
Myprotein
Myprotein Impact Whey Protein Powder | 22g Premium Protein Per Serving | Builds Lean Muscle & Aids Recovery | Vanilla 1KG | Vegetarian Low Fat & Carbs | Trusted by Athletes
Check Price
Show More
Why we love it
Great protein to calorie ratio.
Quality assured by Labdoor.
Incredible flavor variety.
Main Highlights
Build, Recover, Repeat – Packed with 22g of high-quality whey protein per serving, Impact Whey Protein fuels muscle growth, maintenance, and recovery, helping you stay one step ahead of your goals
Clean, Certified, Trusted – With Informed Choice certification, every scoop is independently tested for purity, giving athletes confidence in every sip. No hidden nastiest—just premium quality protein you can trust
Leaner Gains, No Extra Baggage – With just 114 calories, 1.9g of fat, and 1.8g of carbs per serving, this is high-protein nutrition without the unnecessary extras, keeping your goals on track
Power Up Your Recovery – Each serving delivers 5g of naturally occurring BCAAs, essential for muscle repair and reducing post-workout soreness, so you can train harder, recover faster, and come back stronger
From The UK’s No.1 Protein Brand – Trusted by millions worldwide, Impact Whey Protein has been a bestseller for over 20 years. Designed by expert nutritionists, it’s the protein choice for elite athletes and everyday fitness enthusiasts alike
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8
Bulk Pure Whey Protein Isolate Powder Shake, Vanilla, Packaging May Vary, 1000 g
Bulk
Why we love it
High-quality protein for training enhancement.
Low in sugar and fat.
Available 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.
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8.9
Excellent
Check Price
8.9
Excellent
Bulk
Bulk Pure Whey Protein Isolate Powder Shake, Vanilla, Packaging May Vary, 1000 g
Check Price
Show More
Why we love it
High-quality protein for training enhancement.
Low in sugar and fat.
Available 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.
Show More
9
Optimum Nutrition Gold Standard 100% Whey Muscle Building and Recovery Protein Powder With Naturally Occurring Glutamine and BCAA Amino Acids, Unflavoured, 30 Servings, 900 g
Optimum Nutrition
13% Off
Why we love it
Supports muscle gain and recovery.
Low in sugar and fat.
Taste variety and easy preparation.
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
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8.7
Excellent
Check Price
8.7
Excellent
Optimum Nutrition
Optimum Nutrition Gold Standard 100% Whey Muscle Building and Recovery Protein Powder With Naturally Occurring Glutamine and BCAA Amino Acids, Unflavoured, 30 Servings, 900 g
13% Off
Check Price
Show More
Why we love it
Supports muscle gain and recovery.
Low in sugar and fat.
Taste variety and easy preparation.
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
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10
Applied Nutrition ISO XP Whey Isolate - Whey Protein Isolate Powder, ISO-XP Funky Yummy Flavours (1kg - 40 Servings) (Choco Honeycomb)
Applied Nutrition
Why we love it
High protein content per serving.
Delicious flavors for everyone.
Free from sugar and fats.
Main Highlights
HIGH LEVELS OF PROTEIN: Our ISO-XP protein powder contains whey isolate. That’s 22.5 grams of protein per serving! ISO Funky Flavours protein shakes are also free from sugar, carbs, fat, soy and gluten. You can use up to 2 scoops per protein drink.
Delicious Flavours to Suit Every Taste - Available in Choco Honeycomb, Choco Caramel, Choco Peanut, Vanilla, Strawberry, Banana, Cafe Latte, and more, offering great taste with premium nutrition.
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8.7
Excellent
Check Price
8.7
Excellent
Applied Nutrition
Applied Nutrition ISO XP Whey Isolate - Whey Protein Isolate Powder, ISO-XP Funky Yummy Flavours (1kg - 40 Servings) (Choco Honeycomb)
Check Price
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Why we love it
High protein content per serving.
Delicious flavors for everyone.
Free from sugar and fats.
Main Highlights
HIGH LEVELS OF PROTEIN: Our ISO-XP protein powder contains whey isolate. That’s 22.5 grams of protein per serving! ISO Funky Flavours protein shakes are also free from sugar, carbs, fat, soy and gluten. You can use up to 2 scoops per protein drink.
Delicious Flavours to Suit Every Taste - Available in Choco Honeycomb, Choco Caramel, Choco Peanut, Vanilla, Strawberry, Banana, Cafe Latte, and more, offering great taste with premium nutrition.
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