Gold Standard 100% Isolate
Optimum Nutrition

Gold Standard 100% Isolate

With 25g of isolate protein to support muscle growth and weight management*
1g carbs, less than 1g fat, gluten-free, and banned substance tested
7.2  out of 10  (22 Reviews)
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Order and automatically receive 22% Off in your cart on Gold Standard 100% Isolate, 1.58 Lbs.!

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Product Overview

Gold Standard 100% Isolate Containers & Bags
ON Logo

Gold Standard® 100% Isolate

25g Protein per serving
1g Carbohydrates per serving
5.5g Naturally occurring BCAAs

Hydrolyzed & Ultra-Filtered Whey Protein Isolate

  • 1g Carbs & Less Than 1g Fat in All Flavors Including Decadent Chocolate Bliss
  • Amazing Taste With 100 - 110 Calories Per Shake
  • 11.4 Grams of Naturally Occurring Essential Amino Acids
  • Gluten Free & Banned Substance Tested
  • Every Batch Manufactured & Tested at ON's State-of-the-Art Facilities that are GMP Registered and GMP for Sport by NSF. We Reject More Whey Protein Than Some Companies Make in One Year!
Gold Standard 100% Isolate Container

Gold Standard 100% Isolate™

To create Gold Standard 100% Isolate™, we start by selecting only the highest quality whey protein which undergoes a series of sophisticated filtration processes to 'isolate' out excess fat, cholesterol, and sugar. A portion of this Whey Protein Isolate is then hydrolyzed - broken down into smaller chains of amino acids. The final product is a fast digesting complete protein containing no more than 1 gram of carbohydrates, less than 1 gram of fat and more than 80% of pure protein per serving. We put in the hard work to assure superior quality, so you can focus on achieving ambitious performance goals.

Ultra-Filtered For Exceptional Purity

Filtration Process Diagram

Using a series of sophisticated separation processes, excess fat, cholesterol, sugars, and other materials are removed so that less than 1 gram of total fat and 1 gram of carbohydrates remain in each serving of Gold Standard 100% Isolate™

Gold Standard 100% Isolate™ At A Glance

Gold Standard 100% Isolate Containers
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1 gram of carbs and less than 1 gram of fat per serving to help build muscle & increase strength*

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First thing in the morning, before or after exercise

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Formulated and developed at the Optimum Nutrition U.S. Research & Development Center

Uncompromising Quality

In addition to testing each ingredient that arrives at our factory to verify precise specifications, Optimum Nutrition tests every product at different stages of production. This dedicated uncompromising commitment to quality assurance is what distinguishes us as a company.

History & Heritage

Optimum Nutrition is legendary for both quality and innovation. In addition to producing the world's best selling whey protein powder, Optimum Nutrition introduced the weight-training world to slow-digesting nighttime protein with Gold Standard 100% Casein™ and created the anytime energy category in sports nutrition with Essential AmiN.O. Energy™.*

Ratings & Reviews

Gold Standard 100% Isolate
Overall Rating
22 Ratings
Verified Buyer Rating
9 Ratings
Average Flavor Rating
5 Flavors
Top Rated Flavor
Slow Churned Caramel Ice Cream
By clicking the button above, you agree to entering the Reviews section. Products in the Store are not intended to diagnose, treat, cure, or prevent any disease.
Jan 31, 2020
Verified Buyer
No written review.
Nov 06, 2019
  • 10 Chocolate Bliss

I really enjoyed the Chocolate Bliss flavor. It tastes like chocolate wafers and mixes really well. If you are slightly lactose intolerant, this product is great as it does not upset your stomach as much (unlike some of the other products)

Jun 10, 2019
  • 10 Chocolate Bliss

Great macros, easy mixing and easily the best tasting chocolate protein on the market.

Apr 30, 2019
Verified Buyer

I am a big fan of Gold Standard so I am quite disappointed with the Birthday Cake flavor. I gave it two changes...It has zero flavor. Now to figure out what to do with the remaining 10 servings :(

Apr 23, 2019

Bought this in chocolate. Used two scoops instead of one to eight ounces of water. Could barely taste chocolate at all. At best, tasted like someone passed a chocolate bar over it.

Mar 20, 2019
Verified Buyer

Easy to mix and take down. Little water down taste, but still legit.

Jan 17, 2019
Verified Buyer

Easy to mix, dissolves pretty quickly, the birthday cake is terrible though, tastes nothing like other proteins (almost taste like bad milk) and it foams really bad for some reason. The strawberry flavor doesn't have any problems at all so I'm not sure why this one is so bad. Other than the one flavor, helps with recovery, its smooth, its decent.

Jan 10, 2019
Verified Buyer

Nice and clean taste. Easy to mix with soya & milk.

Nov 05, 2018

You know those yogurt commercials where a lady eats a yogurt and starts dancing because it tastes so good for so few calories? I always thought those commercials were absurdly unrealistic, until I tried ON Gold Standard 100% Isolate. I mixed the birthday cake flavor with some plain non-fat Greek yogurt, and not only did it blend SO smoothly, it tasted like straight up cheesecake batter. A+, 10/10 in my book.

Oct 22, 2018
  • 10 Chocolate Bliss

Excellent composition and flavor.

Oct 18, 2018
Verified Buyer

Very tasty protein, mixes nicely with water or milk. Has the protein without all the calories.

Oct 15, 2018
Verified Buyer

The flavor is bland, just plain vanilla. Reminds me of back in the 90's of the taste of the protein powders then. I would rather eat my government issued MRE's over this one.

Oct 15, 2018
Verified Buyer

Not a fan. Compared to other whey protein isolates I've taken this one mixes really foamy and I have to wait for the shake to settle 5-10 min before consuming. I'll be going back to dymatize. Strawberry Cream: terrible, very chalky tasting Rich Vanilla: bearable

Sep 21, 2018
  • 10 Chocolate Bliss

This product tastes great, whoever It caused me stomach problems!

Sep 16, 2018
  • 8 Chocolate Bliss

Throw your Gold Standard Whey and the trash and pick this up instead. This is exact what you need post training and isn't 50/50 concentrate bullcrap like Gold Standard Whey. Mixes great, and very good macros.

3 Sizes
1.58 Lbs.
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1 Flavor
Chocolate Bliss
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Price: $32.99  ($1.37 / Serving)
On Backorder
Flavor Rating: 8.8


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1g carbs, less than 1g fat, gluten-free, and banned substance tested

What's in Optimum Nutrition Gold Standard 100% Isolate

Serving Size: About 1 Scoop (31g)
24 Servings Per Container
Amount Per Serving
Calories 110       
% Daily Value*
Total Fat .5 g 1%
Cholesterol 5 mg 2%
Sodium 190 mg 8%
Total Carbohydrate 1 g 0%
Protein 25 g 50%
Calcium 150 mg 10%
Iron .5 mg 2%
Potassium 240 mg 6%
Not a significant source of saturated fat, trans fat, dietary fiber, total sugars, added sugars and vitamin D.
* The % Daily Value tells you how much a nutrient in a serving of food contributes to a daily diet. 2,000 calories a day is used for general nutrition advice.
Partially Hydrolyzed Whey Protein Isolate, Whey Protein Isolate, Cocoa (Processed With Alkali), Natural And Artificial Flavor, Lecithin, Salt, Sucralose.
CONTAINS: Milk and Soy.

Directions For Gold Standard 100% Isolate:

Mix 1 scoop (31g) with 6 to 8 fluid ounces of cold water. 

Suggested Use: For healthy adults, consume enough protein to meet daily protein requirements with a combination of high protein foods and protein supplements throughout the day as part of a balanced diet and exercise program.


* These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.