Best Whey Isolate Protein of 2025

Last updated on 10/10/2025

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Most Relevant

Best Choice

Optimum Nutrition Gold Standard Whey Muscle Building and Recovery Protein Powder With Naturally Occurring Glutamine and Amino Acids, Vanilla Ice Cream, 76 Servings, 2.28kg, Packaging May Vary

Optimum Nutrition Gold Standard Whey Muscle Building and Recovery Protein Powder With Naturally Occurring Glutamine and Amino Acids, Vanilla Ice Cream, 76 Servings, 2.28kg, Packaging May Vary

Optimum Nutrition

4% OffFree Shipping

Why we love it

Supports muscle gain and recovery.
Informed Choice certified formula.
Variety of delicious flavours.

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

9.8

Exceptional

9.8

Exceptional

Optimum Nutrition

Optimum Nutrition Gold Standard Whey Muscle Building and Recovery Protein Powder With Naturally Occurring Glutamine and Amino Acids, Vanilla Ice Cream, 76 Servings, 2.28kg, Packaging May Vary

4% OffFree Shipping

Why we love it

Supports muscle gain and recovery.
Informed Choice certified formula.
Variety of delicious flavours.

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

Value for Money

Applied Nutrition Critical Whey Protein Powder – 24g Protein per Serving, High Protein Powder, Protein Shake with BCAAs & Glutamine – Muscle Growth & Recovery (2Kg - 61 Servings)(White Choco Hazelnut)

Applied Nutrition Critical Whey Protein Powder – 24g Protein per Serving, High Protein Powder, Protein Shake with BCAAs & Glutamine – Muscle Growth & Recovery (2Kg - 61 Servings)(White Choco Hazelnut)

Applied Nutrition

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.

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.

Nutrisport Whey Protein Isolate Chocolate 5Kg

Nutrisport Whey Protein Isolate Chocolate 5Kg

Nutrisport

Why we love it

Low fat and lactose-free.
Contains anticatabolic amino acids.
Easily digested, high nutritional value.

Main Highlights

Low fat and lactose
Ingredients:Cross flow microfiltered whey protein isolate (milk), flavour (nature identical), sweetener (sodium cyclamate), stabiliser, pea fibre.Highest levels of anticataboilc amino acids
Pure cross flow microfiltered
Aspartame free
Highest biological value and easily digested

Nutrisport Whey Protein Isolate Chocolate 5Kg

Why we love it

Low fat and lactose-free.
Contains anticatabolic amino acids.
Easily digested, high nutritional value.

Main Highlights

Low fat and lactose
Ingredients:Cross flow microfiltered whey protein isolate (milk), flavour (nature identical), sweetener (sodium cyclamate), stabiliser, pea fibre.Highest levels of anticataboilc amino acids
Pure cross flow microfiltered
Aspartame free
Highest biological value and easily digested

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 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% OffFree Shipping

Why we love it

Supports your active fitness routine.
Low in sugars and fat.
Easy to mix formula.

Main Highlights

Pure hydrolysed whey protein isolate powder designed to support your strength training, CrossFit routine, gym workout, and fitness sessions
Each serving contains 30 g of the FASTEST DIGESTING PROTEIN for the growth and maintenance of muscle mass*
Carefully formulated with 9.5 g of both naturally occurring BCAAs and added amino acids
Hydrolysed whey protein isolates deliver the PUREST FORM OF WHEY PROTEIN with minimal amounts of fat and sugars; ONLY 1 g OF SUGARS OR LESS and no more than 0.5 g of fat per serving
An EASY TO MIX, the any-time protein formula that provides an extra source of protein throughout the day, in three varieties: Milk Chocolate, Super Strawberry, and Vanilla Bean
For a tasty protein shake add 1 scoop of the whey isolate to 260 ml of water and shake, stir, or blend well
*Source: Official Journal of the European Union - COMMISSION REGULATION (EU) No 432/2012

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% OffFree Shipping

Why we love it

Supports your active fitness routine.
Low in sugars and fat.
Easy to mix formula.

Main Highlights

Pure hydrolysed whey protein isolate powder designed to support your strength training, CrossFit routine, gym workout, and fitness sessions
Each serving contains 30 g of the FASTEST DIGESTING PROTEIN for the growth and maintenance of muscle mass*
Carefully formulated with 9.5 g of both naturally occurring BCAAs and added amino acids
Hydrolysed whey protein isolates deliver the PUREST FORM OF WHEY PROTEIN with minimal amounts of fat and sugars; ONLY 1 g OF SUGARS OR LESS and no more than 0.5 g of fat per serving
An EASY TO MIX, the any-time protein formula that provides an extra source of protein throughout the day, in three varieties: Milk Chocolate, Super Strawberry, and Vanilla Bean
For a tasty protein shake add 1 scoop of the whey isolate to 260 ml of water and shake, stir, or blend well
*Source: Official Journal of the European Union - COMMISSION REGULATION (EU) No 432/2012

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 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

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

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

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

PBN Premium Body Nutrition - Whey Isolate Protein Powder, Chocolate - 75 Servings, 2.27 kg (Pack of 1)

PBN Premium Body Nutrition - Whey Isolate Protein Powder, Chocolate - 75 Servings, 2.27 kg (Pack of 1)

Premium Body Nutrition

Free Shipping

Why we love it

High-quality Whey Protein isolate.
Promotes muscle growth maintenance.
Supports bone health.

Main Highlights

Chocolate - Whey Protein-ISOLATE with 87Percentage+ Protein, 2.27 kg, jar with a delicious Banana flavour
A jar with a delicious Banana flavour
Protein contributes to growth in muscle mass and to the maintenance of normal bones.
1-Protein contributes to a growth in muscle mass.
2-Protein contributes to the maintenance of normal bones.

Premium Body Nutrition

PBN Premium Body Nutrition - Whey Isolate Protein Powder, Chocolate - 75 Servings, 2.27 kg (Pack of 1)

Free Shipping

Why we love it

High-quality Whey Protein isolate.
Promotes muscle growth maintenance.
Supports bone health.

Main Highlights

Chocolate - Whey Protein-ISOLATE with 87Percentage+ Protein, 2.27 kg, jar with a delicious Banana flavour
A jar with a delicious Banana flavour
Protein contributes to growth in muscle mass and to the maintenance of normal bones.
1-Protein contributes to a growth in muscle mass.
2-Protein contributes to the maintenance of normal bones.

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 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

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

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

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

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

Dymatize

5% OffFree Shipping

Why we love it

Powerful physique support.
Digests easily.
Quality, gluten-free protein.

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

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

5% OffFree Shipping

Why we love it

Powerful physique support.
Digests easily.
Quality, gluten-free protein.

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

Impact Whey Isolate Protein Powder, Natural Chocolate

Impact Whey Isolate Protein Powder, Natural Chocolate

Myprotein

3% OffFree Shipping

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

Impact Whey Isolate Protein Powder, Natural Chocolate

3% OffFree Shipping

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

Myprotein Clear Whey Protein Isolate Powder - Peach Tea - 488g - 20 Servings - Cool and Refreshing Whey Protein Shake Alternative - 20g Protein and 4g BCAA per Serving

Myprotein Clear Whey Protein Isolate Powder - Peach Tea - 488g - 20 Servings - Cool and Refreshing Whey Protein Shake Alternative - 20g Protein and 4g BCAA per Serving

Myprotein

29% OffFree Shipping

Why we love it

Light and refreshing protein supplement.
Packed with 20g protein, BCAAs, glutamine.
Informed Choice certified quality.

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 4,5g 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 Clear Whey Protein Isolate Powder - Peach Tea - 488g - 20 Servings - Cool and Refreshing Whey Protein Shake Alternative - 20g Protein and 4g BCAA per Serving

29% OffFree Shipping

Why we love it

Light and refreshing protein supplement.
Packed with 20g protein, BCAAs, glutamine.
Informed Choice certified quality.

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 4,5g 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.

We scanned 844 products

We reviewed these offers relevant to the Whey Isolate Protein 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, Applied Nutrition, Nutrisport, Premium Body Nutrition, PINK SUN, Dymatize, 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 Whey Isolate Protein in the market, we considered we took a deep dive into 4221 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 Gold Standard Whey Muscle Building and Recovery Protein Powder With Naturally Occurring Glutamine and Amino Acids, Vanilla Ice Cream, 76 Servings, 2.28kg, Packaging May Vary. We love many things about this product by Optimum Nutrition. What sets it apart from the competition is Supports muscle gain and recovery. , Informed Choice certified formula, Variety of delicious flavours.
The best value product for most shoppers and where user satisfaction is continuously the highest is Applied Nutrition Critical Whey Protein Powder – 24g Protein per Serving, High Protein Powder, Protein Shake with BCAAs & Glutamine – Muscle Growth & Recovery (2Kg - 61 Servings)(White Choco Hazelnut) by Applied Nutrition based on online reviews by bloggers, experts and online shoppers.
The biggest bargain at the moment for Whey Isolate Protein and the best cost-to-value ratio is Myprotein Clear Whey Protein Isolate Powder - Peach Tea - 488g - 20 Servings - Cool and Refreshing Whey Protein Shake Alternative - 20g Protein and 4g BCAA per Servingat Myprotein with a 29% discount.
Our list of the best Whey Isolate Protein 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.