Hydrolyzed 100% Whey Protein Isolate
A delicious, ultra-pure, fast-absorbing whey protein isolate to support muscle growth.*
9.3  out of 10  (2,356 Reviews)
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Product Overview

Dymatize Informed Choice. Trusted by Sport.
Clean & Pure
Muscle Building


Isolate of the year
5 years in a row
typical amounts per serving


Grams of Protein


Grams of BCAAs


Grams of Leucine


Gram of Sugar



Why ISO100?

ISO100® is simply muscle-building fuel. Each serving contains 25 grams of protein and 5.5g of BCAAs including 2.7g of L-Leucine. Known worldwide for quality, taste and purity, ISO100 is produced to our highest quality standards. ISO100 is formulated using a cross-flow micro filtration, multi-step purification process that preserves important muscle-building protein fractions while removing excess carbohydrates, fat, lactose and cholesterol. ISO100 is made with pre-hydrolyzed protein sources to ensure fast digestion and absorption.

  • 25g of Whey Protein Isolate
  • 5.5g of BCAAs proven to help build muscle and aid in recovery
  • 1g of Sugar per serving
No Artificial Colors or Flavors. Sweetened with Stevia
Cinnamon Bun
Dymatize ISO-100. Hydrolyzed. 100% Whey Protein Isolate.
Available in
12 Indulgent Flavors
Peanut Butter - New Flavor
Cinnamon Bun
Cookies and Cream
Fudge Brownie
Gourmet Chocolate
Gourmet Vanilla
Orange Dreamsicle
Smoot Banana
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Ratings & Reviews

Overall Rating
2,356 Ratings
Verified Buyer Rating
1,295 Ratings
Average Flavor Rating
28 Flavors
Top Rated Flavor
Dutch Chocolate
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.
Aug 19, 2019
Verified Buyer
  • 10 Fudge Brownie

Hands down the Fudge Brownie is my flavor-favorite. It mixes smooth and tastes great with just water, or when I crank it up with some ice, a half-cup of frozen strawberries, peanut butter and oats. It's like bodybuilder foreplay.

Aug 15, 2019
  • 10 Chocolate Peanut Butter

I can honestly say that I am not a fan of Chocolate Peanut Butter protein, but this product showed me how wrong I was. Neither of the flavors were over bearing so it was a great mix. I did not buy this product, but a tub was given to me as a prize. Can't beat free stuff, and I will purchase this when I have used it all up. Very good flavor.

Aug 03, 2019
Verified Buyer

Hands down the Best and cleanest protein out there!!!

Jul 24, 2019
Verified Buyer
  • 10 Gourmet Vanilla
Jul 22, 2019
Verified Buyer
  • 10 Chocolate Peanut Butter

This is as good as a Reese’s milkshake but not as heavy on the stomach and without sugar.

Jul 21, 2019
Verified Buyer
  • 10 Orange Dreamsicle

This is probably one of the best protein shakes out there and tastes amazing!

Jul 21, 2019
  • 9 Cookies and Cream
  • 6 Gourmet Vanilla

Although I didn't buy Dymatize ISO100 from as I live in Australia might do in future. I did try two flavors and if you are confused what to go for between these two i'll recommend Cookies and Cream as the Vanilla one was a bit odd for me. I'm currently going with Vanilla as I bought it recently to give it a try but Cookies & Cream all the way!

Jul 20, 2019
Verified Buyer
  • 6 Gourmet Vanilla

Great product, good results, gives the protein you need without carbs and fat. However Gourmet vanilla flavor was a disappointment, its too watery and quite flat on the vanilla taste.

Jul 19, 2019
Verified Buyer
  • 10 Chocolate Peanut Butter
  • 8 Birthday Cake

This protein blends better than any I've used. The Chocolate Peanut Butter is the best flavor I've ever tasted. The Birthday Cake does necessarily taste like birthday cake, but it's still really good.

Jul 17, 2019
  • 9 Orange Dreamsicle
  • 8 Chocolate Peanut Butter

I have been a loyal patron of Optimum Nutrition Protein and products for years. I got a cheap deal on this and decided to try it. Great flavor, consistency, and easy in the gut. Can’t wait to try more flavors.

Jun 29, 2019
Verified Buyer
  • 1 Chocolate Peanut Butter

This protein and flavor has got to be one of the worst I've ever tasted. The only way I can get through a shake is downing it as quickly as I can and chasing it with something right after. The product is difficult to mix and I have to either continuously shake it for minutes or power through the clumps...

Jun 14, 2019
Verified Buyer
  • 1 Cookies and Cream

I have only tried this flavor, it taste awful! It feels too artificially and too sweet. Can't wait for this thing to be over. I might give the natural flavor a try next time.

Jun 12, 2019
Verified Buyer
  • 10 Chocolate Peanut Butter

The Chocolate Peanut Butter is amazing!!! I absolutely love it! It almost makes me crave my protein!!!

Jun 07, 2019
Verified Buyer
  • 10 Chocolate Peanut Butter

Amazing flavor, taste like you're drinking a Nutty bar! Best flavor yet!

Jun 07, 2019
Verified Buyer
  • 6 Orange Dreamsicle

This is a strange mix: thin and watery yet extra sweet. Jury still out on this one but I think I might not buy again. I guess I'm used to another brand that mixes a bit thicker (not heavy thick, but just... more than thin watery mix)

4 Sizes
1.6 Lbs.
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12 Flavors
Birthday Cake
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Price: $29.99  ($1.25 / Serving)
Flavor Rating: 8.6

What's in Dymatize ISO100

1.6 Lbs. Birthday Cake
Serving Size: 1 Scoop (30g)
Servings Per Container: About24
Amount Per Serving
Calories 110       
Calories from Fat 0       
% Daily Value *
Total Fat 0 g 0%
Saturated Fat 0 g 0%
Trans Fat 0 g       
Cholesterol 10 mg 3%
Sodium 160 mg 7%
Potassium 100 mg 3%
Total Carbohydrate 1 g 0%
Dietary Fiber 0 g 0%
Sugars (less than) 1 g       
Protein 25 g 50%
Vitamin A 0%
Vitamin C 0%
Calcium 10%
Iron 0%
* Percent Daily Values are based on a 2,000 calorie diet. Your daily values may be higher or lower depending on your calorie needs.
Hydrolyzed Whey Protein Isolate, Whey Protein Isolate, Natural and Artificial Flavor, Salt, Soy Lecithin, Sucralose, Steviol Glycosides (Stevia)
Gluten Free

Directions For ISO100: Formulated for easy mixing. Add one scoop (included) to 5-6 oz (150ml-180ml) of water, milk or your favorite beverage and mix thoroughly. Enjoy prior to workouts, within 30 minutes after workouts or anytime you desire a high-quality, high-protein drink.

* 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.
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