Skip to Main Content
Sam's Club
Sam's Club
All Departments
All Services
Customer reviews for ISOPURE Whey Protein Isolate, Unflavored, 1.55 lbs. for
ISOPURE Whey Protein Isolate, Unflavored, 1.55 lbs.
4.3 out of 5 stars
stars
126 ratings122 reviews
  1. 5 stars57% (72)
  2. 4 stars27% (34)
  3. 3 stars10% (12)
  4. 2 stars1% (1)
  5. 1 star6% (7)

Member photos

Sort by |
Showing 11-20 of 122 reviews
May 6, 2026
Reviewer name: anonymous
1 out of 5 stars
1 out of 5 stars review

Ripoff!!!

This is 100% rip off. It may be quality protein, but it's twice the price for half as much as the nasty flavored stuff that's full of garbage. there's better stuff available at a much better price elsewhere.

Helpful?70GIW7NABGMB16150765564
Dec 29, 2025
Reviewer name: Ariel
4 out of 5 stars
4 out of 5 stars review

A for effort but doesn't always hit the mark

I'm still trying to figure out if i like this product. Although it's "flavorless", when it's added to anything plain it gives a horrible taste in my opinion. I think in a homemade protein smoothie it would be okay but i would put it in a mason jar with a cold liquid and shake really well before adding it even to a blender. It clumps very easily....anyone saying it mixes with ease is probably sponsored by this product. LOL :P I added it to hot coffee and used a frother which just made it clump and curdle. The product itself seems great as far as ingredients but definitely takes a little figuring out to find something it's good in . I was hoping i could just add it to almond milk or coffee and be good to go but it's definitely not that simple unfortunately.

Helpful?70GIW7NABGMB16150765564
Nov 10, 2025
Reviewer name: A.D.
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

Solid

As billed great supplement. Some tips when adding to coffee - mix separate in shaker with only 4-6oz lukewarm H2O. The mix becomes frothy and adds to coffee without clumping. Overall this has been an awesome addition to daily protein intake. Additionally, though I'm lactose intolerant no issues with my stomach. Already bought more

Review from Glanbia Performance Nutrition, Inc.
Helpful?70GIW7NABGMB16150765564
Oct 17, 2025
Reviewer name: Beth J
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

Great product!

I've been using Isopure Unflavored protein powder for a couple of years. It dissolves easily into beverages (I add it to my chai) and I like adding it to my smoothies, Greek yogurt and oatmeal as a way to get extra protein. I also love the large package size which means less ordering + less packaging waste!

Review from Glanbia Performance Nutrition, Inc.
Helpful?70GIW7NABGMB16150765564
Feb 16, 2026
Reviewer name: AnaG
5 out of 5 stars
5 out of 5 stars review

Taste great

[This review was collected as part of a promotion.] This protein powder mixes easily and is a good source of protein without adding sugar or carbs to my day. I love how easy it is to incorporate it into my day. I also love that there isn't a very distinctive taste.

Review from influenster.com
Helpful?70GIW7NABGMB16150765564
Oct 28, 2026
Reviewer name: anonymous
1 out of 5 stars
1 out of 5 stars review

Almost 30% price increase

Price went up from 30$ to 42.8$ with in 7 months. Good product but not the price hike

Helpful?70GIW7NABGMB16150765564
Oct 3, 2026
Reviewer name: anonymous
3 out of 5 stars
3 out of 5 stars review

Price increase is insane!!!

Is it me or the price just jumped over 20% within 1 week?

Helpful?70GIW7NABGMB16150765564
Feb 22, 2026
Reviewer name: Christine
3 out of 5 stars
3 out of 5 stars review

Doesn’t mix well

Lots of clumping. Doesn’t mix well. To mix in coffee and be able to drink it you’re going to need a blender.

Helpful?70GIW7NABGMB16150765564
Feb 2, 2026
Reviewer name: Kendria
5 out of 5 stars
5 out of 5 stars review

I love it I mix a scoop in my protein shakes it's perfect it makes the best protein shakes I love it being unflavored I can mix whatever I want in it n it turns out great!!!

Helpful?70GIW7NABGMB16150765564
Oct 19, 2025
Reviewer name: Anne
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

Recommend

Good product, smooth taste.

Helpful?70GIW7NABGMB16150765564