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Best Whey Protein Isolate of 2026
Last updated on 03/04/2026
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1
Reflex Nutrition Isolate Pro - 83% Premium Protein from Whey Isolate Protein Powder - Fast Absorption, Low Lactose, Low Fat, Low Sugar Protein Shake - Muscle Gain (Vanilla, 1.8kg, 60 Servings)
Reflex
Why we love it
High protein without extra calories.
Optimal for muscle gain.
Effortlessly blends into shakes.
Main Highlights
Premium Protein Excellence: Reflex Isolate Pro is made from whey isolate stripped of most fats and carbs, ensuring high protein purity - Ideal for increasing protein intake without extra calories and suitable for those with lactose intolerance
Optimal Nutritional Values: Each 30g scoop of whey protein isolate provides 25g of protein, Less than 0.5g of fat and Less than 0.5g of carbs - The ideal choice for those seeking muscle gain and lean mass maintenance with minimal calorie intake (103 kcal per serving)
Effortless Mixing: This whey protein powder blends smoothly into water or milk for silky protein shakes and can be easily incorporated into various culinary creations, serving as a post workout muscle growth aid or a healthy protein snack
Optimised for Rapid Recovery: Reflex grass fed whey protein powder is ultra-filtered for fast absorption, making it as a post workout protein snack - With whey protein isolate, it's the highest purity whey to maximise muscle growth
Manufactured in an informed sport registered facility: Reflex Isolate Pro whey protein supplement is vegetarian-friendly, Halal-certified, free from hormones, and with no added sugars, artificial colours or soy protein - Contains soy derivatives
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9.7
Exceptional
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9.7
Exceptional
Reflex
Reflex Nutrition Isolate Pro - 83% Premium Protein from Whey Isolate Protein Powder - Fast Absorption, Low Lactose, Low Fat, Low Sugar Protein Shake - Muscle Gain (Vanilla, 1.8kg, 60 Servings)
Check Price
Show More
Why we love it
High protein without extra calories.
Optimal for muscle gain.
Effortlessly blends into shakes.
Main Highlights
Premium Protein Excellence: Reflex Isolate Pro is made from whey isolate stripped of most fats and carbs, ensuring high protein purity - Ideal for increasing protein intake without extra calories and suitable for those with lactose intolerance
Optimal Nutritional Values: Each 30g scoop of whey protein isolate provides 25g of protein, Less than 0.5g of fat and Less than 0.5g of carbs - The ideal choice for those seeking muscle gain and lean mass maintenance with minimal calorie intake (103 kcal per serving)
Effortless Mixing: This whey protein powder blends smoothly into water or milk for silky protein shakes and can be easily incorporated into various culinary creations, serving as a post workout muscle growth aid or a healthy protein snack
Optimised for Rapid Recovery: Reflex grass fed whey protein powder is ultra-filtered for fast absorption, making it as a post workout protein snack - With whey protein isolate, it's the highest purity whey to maximise muscle growth
Manufactured in an informed sport registered facility: Reflex Isolate Pro whey protein supplement is vegetarian-friendly, Halal-certified, free from hormones, and with no added sugars, artificial colours or soy protein - Contains soy derivatives
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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
14% Off
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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9.6
Superb
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9.6
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)
14% Off
Check Price
Show More
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
Dymatize ISO 100 Hydrolyzed Gourmet Chocolate 932g - Whey Protein Hydrolysat + Isolat Powder
Dymatize
15% Off
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
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9.6
Superb
Check Price
9.6
Superb
Dymatize
Dymatize ISO 100 Hydrolyzed Gourmet Chocolate 932g - Whey Protein Hydrolysat + Isolat Powder
15% Off
Check Price
Show More
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
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4
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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9.6
Superb
Check Price
9.6
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
5
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
9.5
Superb
Check Price
9.5
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
6
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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9.3
Superb
Check Price
9.3
Superb
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
7
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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9.1
Superb
Check Price
9.1
Superb
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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8
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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9.0
Superb
Check Price
9.0
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
Check Price
Show More
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
Show More
9
Impact Whey Isolate Protein Powder, Natural Chocolate
Myprotein
Why we love it
Great for muscle growth upkeep.
Impressively low in fat, carbs.
Packed with 90% protein ratio.
Main Highlights
One of the purest whey protein powder
Made from milk from pasture cows
Helps to build and repair new muscle
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8.8
Excellent
Check Price
8.8
Excellent
Myprotein
Impact Whey Isolate Protein Powder, Natural Chocolate
Check Price
Show More
Why we love it
Great for muscle growth upkeep.
Impressively low in fat, carbs.
Packed with 90% protein ratio.
Main Highlights
One of the purest whey protein powder
Made from milk from pasture cows
Helps to build and repair new muscle
Show More
10
Applied Nutrition Clear Hydrolysed Beef Protein Isolate Powder, Fruit Juice Style, Dairy Free, Lactose Free, Zero Sugar, Low Fat, 1.8kg - 60 Servings (Blackcurrant Millions)
Applied Nutrition
20% Off
Why we love it
Dairy-free protein for all.
Supports muscle growth efficiently.
Delicious flavors for everyone.
Main Highlights
DAIRY AND LACTOSE-FREE PROTEIN: Ideal for those who are lactose intolerant or avoid dairy, providing a clean, high-quality protein source for muscle growth and recovery. CONTRIBUTES TO THE GROWTH OF MUSCLES MASS: Beef protein specially formulated for its high protein content. With 27.7g of protein per serving, it assists the growth of muscle. Comprehensive amino acid profile provides all essential amino acids for healthy bodily functions. PERFECT MIXING AND AMAZING TASTE: Beef protein comes in 3 different amazing flavours to suit taste preferences: Blue Raspberry, Mixed Berry, Orange & Mango. When added to milk or water, it mixes well for a smooth and delicious drink.
ZERO SUGAR, LOW FAT: Perfect for low-carb and keto diets, this protein powder is free of sugar and low in fat, supporting lean muscle building without unwanted calories.
HALAL CERTIFIED: This protein beef isolate has been produced in a manner that adheres to strict halal guidelines ensuring suitability for those following a halal diet while providing high-quality, clean beef protein isolate.
Applied Nutrition Limited Trio, Acornheld Road, Knowsley, L33 7UG (UK)
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8.8
Excellent
Check Price
8.8
Excellent
Applied Nutrition
Applied Nutrition Clear Hydrolysed Beef Protein Isolate Powder, Fruit Juice Style, Dairy Free, Lactose Free, Zero Sugar, Low Fat, 1.8kg - 60 Servings (Blackcurrant Millions)
20% Off
Check Price
Show More
Why we love it
Dairy-free protein for all.
Supports muscle growth efficiently.
Delicious flavors for everyone.
Main Highlights
DAIRY AND LACTOSE-FREE PROTEIN: Ideal for those who are lactose intolerant or avoid dairy, providing a clean, high-quality protein source for muscle growth and recovery. CONTRIBUTES TO THE GROWTH OF MUSCLES MASS: Beef protein specially formulated for its high protein content. With 27.7g of protein per serving, it assists the growth of muscle. Comprehensive amino acid profile provides all essential amino acids for healthy bodily functions. PERFECT MIXING AND AMAZING TASTE: Beef protein comes in 3 different amazing flavours to suit taste preferences: Blue Raspberry, Mixed Berry, Orange & Mango. When added to milk or water, it mixes well for a smooth and delicious drink.
ZERO SUGAR, LOW FAT: Perfect for low-carb and keto diets, this protein powder is free of sugar and low in fat, supporting lean muscle building without unwanted calories.
HALAL CERTIFIED: This protein beef isolate has been produced in a manner that adheres to strict halal guidelines ensuring suitability for those following a halal diet while providing high-quality, clean beef protein isolate.
Applied Nutrition Limited Trio, Acornheld Road, Knowsley, L33 7UG (UK)
Show More
