Hydrolyzed 100% Whey Protein Isolate
A delicious, ultra-pure, fast-absorbing whey protein isolate to support muscle growth.*
9.3  out of 10  (2,349 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
2,349 Ratings
Verified Buyer Rating
1,290 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.
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)

Jun 05, 2019
Verified Buyer
  • 9 Orange Ice Cream

Excellent taste, but very poorly soluble. I drink this product for several years and tried different tastes, for the first time it does not completely dissolve even in a shaker.

Jun 04, 2019
Verified Buyer
  • 10 Chocolate Peanut Butter
May 28, 2019
  • 9 Gourmet Vanilla
  • 5 Birthday Cake
  • 5 Cookies and Cream

I wish it had digestive enzymes and flavors were less sweet

May 25, 2019
  • 10 Peanut Butter

Peanut butter flavor was delicious

May 22, 2019
Verified Buyer
  • 10 Chocolate Peanut Butter

Dymatize ISO-100 is the best tasting and mixing protein I’ve used. Closest flavor to a Reese’s cup I’ve found. Absolutely love this flavor.

May 12, 2019
Verified Buyer
  • 10 Gourmet Chocolate

i used to buy 5lb iso100 every month but they changed their formula and dumbed down their product. its no longer only protein hydroslate, they have other less clean protein mixed in. The worst part for me is that it is no longer lactose free.

May 08, 2019
Verified Buyer
  • 10 Dutch Chocolate

So I wanted to try a protein without Sucralose which is hard to find. I ordered this based on the reviews and its a very good protein! The taste is fantastic. You immediately notice the natural taste and lack of "over sweetened" after taste. I would binge on sugar after using protein with Sucralose because my body spike insulin and then realize there's no **** sugar! Try this protein if you have this type of reaction.

Apr 24, 2019
Verified Buyer
  • 10 Chocolate Peanut Butter
  • 10 Cookies and Cream
  • 8 Cinnamon Bun
  • 9 Birthday Cake

This has been my go to protein for a couple years. Unbeatable nutrition profile, fast absorbing and low carb which is perfect for post workout shake, and the best Chocolate Peanut Butter flavor around in my opinion. Totally worth the extra money.

Apr 22, 2019
Verified Buyer
  • 9 Cookies and Cream

Protein tastes great and blends well

Apr 19, 2019
Verified Buyer
  • 10 Chocolate Peanut Butter

I very much loved the product, mixes good, tastes good, and smells wonderful. I bought for a friend as well, and his opinion is the same as mine. Would definitely order this again...

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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