Search  for anything...
Dymatize

Dymatize ISO100 Whey Protein Powder Isolate, Birthday Cake, 25g of Protein, 5 Pound, 5.5g BCAAs, Less Than 120 Cal., Gluten Free, 1g Fat, 1g Sugar, 2g Carb (75 Servings)

  • Based on 37,047 reviews
Condition: New
Checking for the best price...
$109.99 Why this price?

Buy Now, Pay Later

As low as $18.33 / mo
  • – 6-month term
  • – No impact on credit to apply
  • – Instant approval decision
  • – Secure and straightforward checkout

Ready to go? Add this product to your cart and select a plan during checkout.

Payment plans are offered through our trusted finance partners Klarna, Affirm, Afterpay, Apple Pay, and PayTomorrow. No-credit-needed leasing options through Acima may also be available at checkout.

Learn more about financing & leasing here.

Selected Option

Free shipping on this product

This item is eligible for return within 30 days of receipt

To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

Availability: In Stock.
Fulfilled by Amazon
Arrives Sunday, Apr 26
Order within 16 hours and 18 minutes
Available payment plans shown during checkout
Protection Plan Protect Your Purchase
Checking for protection plans...

Flavor Name: Birthday Cake


Size: 5 Pound (Pack of 1)


Features

  • OUR BEST-QUALITY PROTEIN: Dymatize ISO100 is our higest-quality protein, and it is designed to support muscle growth through rapid protein absorption. The protein is broken down into small peptides, facilitating faster digestion and absorption.
  • WITH YOU, WE PUSH WHAT IS POSSIBLE: Just like you push to improve, Dymatize pushes protein to the next level. One of the best protein powders in the game, its filtered to remove excess lactose, carbs, fat, and sugar for maximum gains.
  • FOR EVERYONE: This protein powder that is Made in the USA is ideal for everyone. Whether youre at the beginning of your exercise journey, maintaining a healthy lifestyle, gym veteran, or need a quick meal replacement on the go, Dymatize is here.
  • SIMPLE: 25g of protein, 5g of BCAA, 1g of fat, 1g of sugar, gluten free, and less than 120 calories, ISO100 whey protein provides a simple macro
  • YOU MIX YOUR WAY: Mix with water, almond milk, oat milk, or your favorite liquid for a delicious drink. Add it to overnight oats, pancakes, or waffles to give your protein-packed meal to kick start your day.

Description

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.

Is Discontinued By Manufacturer ‏ : ‎ No


Product Dimensions ‏ : ‎ 8.46 x 8.46 x 11.42 inches; 5.07 Pounds


Item model number ‏ : ‎ D50042


Date First Available ‏ : ‎ February 27, 2014


Manufacturer ‏ : ‎ Dymatize Nutrition


Best Sellers Rank: #1,141 in Health & Household (See Top 100 in Health & Household) #16 in Sports Nutrition Whey Protein Powders #2,177 in Sales & Deals


#16 in Sports Nutrition Whey Protein Powders:


#2,177 in Sales & Deals:


Customer Reviews: 4.3 4.3 out of 5 stars (2,890)


Flavor: Birthday Cake


Diet Type: Gluten Free


Product Benefits: Muscle Growth


Protein Source: Whey


Protein: 25 Grams


Total Servings Per Container: 75


Item Weight: 2.3 Kilograms


Unit Count: 80.0 Ounce


Number of Items: 1


Item Dimensions: 8.46 x 8.46 x 11.42 inches


Net Content Volume: 80 Fluid Ounces


Brand Name: Dymatize


Package Type Name: Canister


Age Range Description: Adult


Model Name: Hydrolyzed Protein Powder


UPC: 705016500420


Manufacturer Part Number: D50042


Model Number: D50042


Manufacturer: Dymatize Nutrition


Recommended Uses For Product: Pre-Workout


Allergen Information: Milk, Soy


Material Type Free: Gluten Free


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Sunday, Apr 26

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Similar Products

Top Amazon Reviews

    • Excellent Quality and Mixability!
Flavor Name: Birthday Cake Size: 1.34 Pound (Pack of 1)
This Dymatize Birthday Cake Pebbles ISO100 whey protein is top-notch in quality. It mixes effortlessly with no clumps or gritty texture; and the protein content is exactly what I want. The flavor is definitely sweeter than I usually prefer, but that’s the only minor drawback. Overall, it’s low in sugar and carbs, and gives a clean, satisfying shake every time. Despite the sweetness, still a 5-star product for me! ... show more
Reviewed in the United States on December 8, 2025 by Kat M
    • Taste Great
Flavor Name: Birthday Cake Size: 1.34 Pound (Pack of 1)
I mix half a scoop with almond milk before my morning workout. It seems to help since I don't eat anything before my workout I need the extra energy. I also use Citrulline and Carnitine. It's usually an hour to an hour and 15 minutes 6 days a week. So I like to have protein options, also use chocolate and vanilla slim fast high protein that works great as well. But this stuff really taste better than both of them! And it has more protein. ... show more
Reviewed in the United States on March 22, 2026 by Rick Medugno
    • Strawberry/ banana smoothie !
Flavor Name: Birthday Cake Size: 1.34 Pound (Pack of 1)
Review Image by Shawnta Lipscomb
Mixed in really good to make smoothies . Taste just like fruity pebbles . My kids and I love it . The birthday cake is the best !
Reviewed in the United States on March 9, 2026 by Shawnta Lipscomb
    • Doesn't taste too much, but effective for weight loss
Flavor Name: Birthday Cake Size: 5 Pound (Pack of 1)
I was expecting a much bigger flavor, it was very mild. I wouldn't say birthday cake, more like birthday cupcake lol. It's not bad though, just very very weak taste. I guess protein powder isn't so much for taste but yes you're going to get less calories with ISO100, just a few but it makes a big difference when losing weight. ... show more
Reviewed in the United States on November 8, 2025 by Jessie
    • Fantastic stuff. Really does taste like a birthday cake.
Flavor Name: Birthday Cake Size: 1.34 Pound (Pack of 1)
I don't know how they do it, but it totally tastes like one of those sugar coated vanilla fluffy cookies from the grocery store. It's kind of a cool way to pretend that I am eating a cookie or cake without actually adding that stuff back into my diet again. Sucralose may be the questionable thing that makes it sweet, but... meh, I have decided I don't care too much about it. Maybe 20 years now, they'll show a study that says this powder causes cancer, but I'd rather drink this than eat meat because meat is kinda gross to me (just a personal opinion). This stuff mixes SOOOOO much better than the Orgain pea protein I had been using last year. And it doesn't taste like I'm choking on sawdust in my throat, either. Mixes well with almond milk, so I assume it also mixes well with regular milk. So yeah, sure, I can recommend this. I intend on trying the other types, too. Maybe the donut one, because it's been a couple years since I've had any donuts. ... show more
Reviewed in the United States on July 2, 2024 by Casi
    • Faint Vanilla Mixed with White Cheddar Cheeto Dust 🤢
Flavor Name: Birthday Cake Size: 1.34 Pound (Pack of 1)
I never leave reviews, but I thought it would be helpful for me to do so here. I purchased the Birthday Cake Pebbles protein powder and just tried it for the first time. Let me tell you, when I first opened the container and smelled it, I got my first hint at how this would be. When making a shake and tasting it, I was absolutely disappointed. This does not taste like birthday cake at all. This tastes like a mix of a faint vanilla and white cheddar cheeto dust. I WISH I was lying to you. I will not be purchasing this again. Before this brand, I tried Orgain Organic protein powder birthday cake flavor and it smells and tastes GREAT! Texture not my favorite, but at least it tastes good! This stuff, however, no. It does not. I'm willing to try the regular fruity pebbles flavor, since so many have left reviews for that one, but the Birthday Cake Pebbles I will never get again. ... show more
Reviewed in the United States on January 17, 2026 by David McBride
    • Amazing Tasting Protein!
Flavor Name: Birthday Cake Size: 5 Pound (Pack of 1)
I’ve been using the Fruity Pebbles flavor, which is great, so I decided to try Birthday Cake—and it did not disappoint. It’s absolutely delicious and might be the best-tasting protein powder I’ve ever had. That’s saying a lot, because I thought Fruity Pebbles was already the best.
Reviewed in the United States on March 17, 2026 by Darrell Williams II
    • Great taste, great macros
Flavor Name: Birthday Cake Size: 1.34 Pound (Pack of 1)
Review Image by Miracle
Delicious and I perfect macros for my fitness/nutrition goals. I’ve been using the dymatize brand for 6 months now. I got the fruity pebbles one first and got this one when it ran out. I mix this product with 1 cup Fairlife milk for taste and so that I only have to use half a scoop (stretches the proteins life). It tastes just like the milk that’s left over after eating cereal-especially the fruity pebbles one. For how I make it-Macros come to 140 cal, 25.5g P, 7g C, 0.5g F I also use this in my ninja creami protein ice cream recipe and it tastes like a Wendy’s vanilla frosty! I only wish they made for flavors like lucky charms, etc. It’s not chalky, doesn’t make me feel heavy, no tummy issues. Definitely recommend and I’m excited to try new flavors:) ... show more
Reviewed in the United States on January 6, 2026 by Miracle

Can't find a product?

Find it on Amazon first, then paste the link below.
Checking for best price...