September 14, 2025

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10 Best whey isolate protein powders of 2025

Save up to 36% off

Best Choice

1

Sports Research
Sports Research Whey Protein - Sports Nutrition Whey Isolate Protein Powder for Lean Muscle Building & Workout Recovery - 5 lb Bag Bulk Protein Powder 25g per Serving - Dutch Chocolate, 56 Servings
Main highlights

High Protein Content
Each serving offers 25g of protein and 6.9g of BCAAs, supporting lean muscle growth.

Versatile Usage
Perfect for shakes, smoothies, baking, or as a protein boost in coffee.

Excellent Mixability
Highly praised for its smooth texture and lack of graininess.
9.8

Exceptional

Our Rating

9.5
Flavor

9.3
worth the money

9.3
quality of ingredients
How do we rank?

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Based on millions of stores and reviews

Shoppers influence our rankings
Analyzing top stores
Value for Money

2

NOW Foods
NOW Foods Sports Nutrition, Whey Protein Isolate, 25 g With BCAAs, Unflavored Powder, 5-Pound

36% Off
Main highlights

High-Quality Protein with BCAAs
NOW Sports Whey Protein Isolate offers 25g of bioavailable protein and BCAAs per serving, ensuring purity and effectiveness for all athletic levels.

Ideal for Smoothies and Cooking
Perfect for smoothies or cooking, this unflavored powder enhances protein intake without changing taste, suitable for fitness and culinary enthusiasts.

Praised for Seamless Blending
Customers love its ability to blend smoothly into drinks and recipes, leaving no gritty texture or aftertaste.
Key specs
- Source:Whey Protein Isolate
- Protein:25 g per serving
- Usage:Mix in smoothie
- BCAAs:N/A
- Flavor:Unflavored
9.5

Excellent

Our Rating

8.0
quality of ingredients

8.0
Powerful blending

8.0
Flavor
3

Optimum Nutrition
Optimum Nutrition Gold Standard 100% Isolate, Protein Powder, Chocolate Bliss, 3 Pounds, 44 Servings. Whey Protein Isolate (Packaging May Vary)

19% Off
Main highlights

Key Features and Benefits
High-quality, hydrolyzed whey protein isolate with 25g protein, 5.5g BCAAs, only 1g carbs, ensuring muscle growth and quick recovery.

Ideal Use Cases
Perfect for athletes, bodybuilders, and fitness enthusiasts seeking rapid muscle recovery, post-workout nutrition, or a low-carb protein source.

Customer Reviews Summary
Most reviews praise its easy digestibility, effectiveness in muscle recovery, and minimal carbohydrate content.
Key specs
- Source:Whey Protein Isolate
- Protein:25 Grams per Serving
- Usage:N/A
- BCAAs:5.5 Grams per Serving
- Flavor:N/A
9.3

Excellent

Our Rating

9.3
quality of ingredients

9.1
Powerful blending

8.9
Flavor
4

Dymatize
Dymatize ISO100 Whey Protein Powder Isolate, Gourmet Vanilla, 25g of Protein, 20 Servings, 5.5g BCAAs, Less Than 120 Cal., Gluten Free, 1g Fat, 1g Sugar, 2g Carb
Main highlights

Fast Absorbing Hydrolyzed Protein
Scientifically formulated with fast-digesting hydrolyzed whey protein isolate for quick muscle recovery.

Ideal for Post-Workout
Perfect for post-workout recovery, providing 25g protein and 5.5g BCAAs per serving.

Smooth Texture Praised
Customers love its smooth, creamy texture and easy mixability.
Key specs
- Source:Hydrolyzed whey
- Protein:25 grams
- Usage:Fast-digesting protein
- BCAAs:5.5 grams
- Flavor:Gourmet Vanilla
9.0

Excellent

Our Rating

9.1
quality of ingredients

8.7
Powerful blending

8.2
worth the money
5

Optimum Nutrition
Optimum Nutrition Gold Standard 100% Whey Protein Powder, Vanilla Ice Cream, 2 Pound (Packaging May Vary)

26% Off
Main highlights

High Protein Content
Provides 24 grams of blended protein per serving, supporting muscle growth and recovery.

Ideal for Fitness Enthusiasts
Perfect for athletes and fitness enthusiasts seeking muscle recovery and lean mass support.

Praised for Taste
Customers love the smooth, creamy taste of Vanilla Ice Cream flavor.
Key specs
- Source:Whey protein
- Protein:24 grams
- Usage:Support lean muscle mass
- BCAAs:Over 5 grams
- Flavor:Double rich chocolate
8.9

Very Good

Our Rating

9.9
Flexibility

9.3
Powerful blending

9.3
quality of ingredients
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6

Isopure
Isopure Zero Carb 100% Pure Whey Isolate Protein Powder, Lactose Free, Gluten Free, With Vitamins, Unflavored, 25g Protein Per Serving, 3 Lbs, 47 Servings (Packaging May Vary)

15% Off
Main highlights

High_Quality_Protein_Source
Provides 25g of whey protein isolate per serving, supporting muscle growth and maintenance.

Versatile_Usage
Ideal for mixing into coffee, water, or smoothies for a convenient protein boost.

Smooth_Texture_and_Taste
Praised for its tasteless, smooth blend with no clumps or aftertaste.
8.8

Very Good

Our Rating

9.3
quality of ingredients

8.4
Flexibility

8.0
worth the money
7

NAKED

NAKED Whey Isolate Protein - Only 2 Ingredients, 30g Grass-Fed Protein, Unflavored, Undenatured, No GMO, No Soy, Gluten-Free, No Preservatives - 28 Servings
8.7

Very Good

Our Rating
8

Nutricost
Nutricost Whey Protein Isolate (Unflavored) 2LBS
Main highlights

Key Features and Benefits
High-quality, unflavored whey protein isolate with 30g protein per serving, made in a GMP compliant, FDA registered facility.

Ideal Use Cases
Perfect for athletes, bodybuilders, and fitness enthusiasts needing a pure protein source for muscle recovery and growth.

Customer Reviews Highlight
Most praised for its purity and lack of flavor, making it versatile for mixing with various foods and beverages.
Key specs
- Source:Whey Protein Isolate
- Protein:30 Grams per serving
- Usage:1 Scoop per serving
- BCAAs:N/A
- Flavor:Unflavored
8.6

Very Good

Our Rating

9.5
Powerful blending

9.1
quality of ingredients

8.9
worth the money
9

Transparent Labs
Transparent Labs Grass-Fed Whey Protein Isolate - Naturally Flavored, Gluten Free Whey Protein Powder with 28g of Protein per Serving & 9 Amino Acids - 30 Servings, Milk Chocolate

10% Off
Main highlights

High Protein Content
Transparent Labs offers 28g of protein per serving, sourced from grass-fed American cattle, ensuring high protein-by-weight ratio with minimal sugar or fat.

Ideal for Muscle Recovery
Perfect for enhancing recovery and promoting muscle growth, this protein is light on the stomach and easily digestible.

Customer Praised Flavor
Customers love the milk chocolate flavor, noting its smooth taste and lack of overwhelming sweetness.
Key specs
- Source:100% grass-fed whey
- Protein:28g per serving
- Usage:Enhance recovery, increase strength
- BCAAs:Contains all nine
- Flavor:Naturally flavored
8.4

Good

Our Rating
10

Six Star
Six Star Whey Protein Powder Plus - Muscle Building & Recovery Formula with Whey Isolate Powder, BCAAs, 30g Protein, Immune Support - Post-Workout Supplement - Triple Chocolate, 1.8 lbs

24% Off
Main highlights

High Protein Content
Provides 30g of ultra-pure whey protein per serving, ideal for muscle recovery and growth.

Versatile Use
Perfect for post-workout recovery or as a daily protein supplement for both men and women.

Smooth Mixing
Highly praised for its ability to mix smoothly without clumps in a blender bottle.
Key specs
- Source:Whey protein
- Protein:30g
- Usage:Post-workout or anytime
- BCAAs:13.4g per 2 scoops
- Flavor:N/A
8.2

Good

Our Rating

9.1
Powerful blending

8.7
worth the money

8.7
quality of ingredients

10 Best whey isolate protein powders of 2025

1

Sports Research Whey Protein - Sports Nutrition Whey Isolate Protein Powder for Lean Muscle Building & Workout Recovery - 5 lb Bag Bulk Protein Powder 25g per Serving - Dutch Chocolate, 56 Servings

9.5

9.3

9.3

How do we rank?

How do we rank?

Analyzing top stores

2

NOW Foods Sports Nutrition, Whey Protein Isolate, 25 g With BCAAs, Unflavored Powder, 5-Pound

8.0

8.0

8.0

3

Optimum Nutrition Gold Standard 100% Isolate, Protein Powder, Chocolate Bliss, 3 Pounds, 44 Servings. Whey Protein Isolate (Packaging May Vary)

9.3

9.1

8.9

4

Dymatize ISO100 Whey Protein Powder Isolate, Gourmet Vanilla, 25g of Protein, 20 Servings, 5.5g BCAAs, Less Than 120 Cal., Gluten Free, 1g Fat, 1g Sugar, 2g Carb

9.1

8.7

8.2

5

Optimum Nutrition Gold Standard 100% Whey Protein Powder, Vanilla Ice Cream, 2 Pound (Packaging May Vary)

9.9

9.3

9.3

6

Isopure Zero Carb 100% Pure Whey Isolate Protein Powder, Lactose Free, Gluten Free, With Vitamins, Unflavored, 25g Protein Per Serving, 3 Lbs, 47 Servings (Packaging May Vary)

9.3

8.4

8.0

7

NAKED Whey Isolate Protein - Only 2 Ingredients, 30g Grass-Fed Protein, Unflavored, Undenatured, No GMO, No Soy, Gluten-Free, No Preservatives - 28 Servings

8

Nutricost Whey Protein Isolate (Unflavored) 2LBS

9.5

9.1

8.9

9

Transparent Labs Grass-Fed Whey Protein Isolate - Naturally Flavored, Gluten Free Whey Protein Powder with 28g of Protein per Serving & 9 Amino Acids - 30 Servings, Milk Chocolate

10

Six Star Whey Protein Powder Plus - Muscle Building & Recovery Formula with Whey Isolate Powder, BCAAs, 30g Protein, Immune Support - Post-Workout Supplement - Triple Chocolate, 1.8 lbs

9.1

8.7

8.7

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