What customers complain about in protein powder reviews
Taste is the most common complaint in protein powder reviews: 7,126 negative mentions, 41.7% of the 17,095 negative mentions that Amazon counts for 8 widely reviewed protein powders. Quality (2,289) and mixing and clumping (2,285) follow. Adlicio read the counts on 12 November 2026.
Updated
At a glance
Products read
8
Ratings on those products
279,609
Topic mentions counted
69,997
Negative mentions
17,095 (24% of all mentions)
Top complaint
Taste (7,126)
Most one-sided topic
Quantity: 80% of its mentions are negative
Source
Amazon review highlights, read with Adlicio on 12 November 2026
Ranked
The most common protein powder complaints, ranked
The most common protein powder complaints, ranked
Complaint topic
Negative mentions
Share of all negative mentions
Negative share of the topic
Products
Taste
7,126
41.7%
28%
8 of 8
Quality
2,289
13.4%
14%
4 of 8
Mixing and clumping
2,285
13.4%
30%
8 of 8
Texture
2,147
12.6%
44%
8 of 8
Value for money
1,387
8.1%
27%
6 of 8
Digestibility
513
3%
32%
5 of 8
Quantity
352
2.1%
80%
2 of 8
Effectiveness
320
1.9%
11%
3 of 8
Ingredients
252
1.5%
12%
4 of 8
Fullness
156
0.9%
20%
1 of 8
5 smaller topics are not in the table. They add up to 268 negative mentions (1.6%).
In buyers' words
What the complaints sound like
Lines from Amazon reviews of these products, as written. Amazon shortens them with "...".
“...Have to stir it up every time you want to take a drink. Also very chalky and gritty in your mouth. I 100% do NOT recommend.”
“Doesn’t mix well, clumps and has a weird aftertaste. I tried mixing it with cold and hot water and even let it sit for ten minutes. Still not great....”
On every product page, Amazon groups what reviewers write into topics and counts how many reviews mention each topic in a positive or a negative way. Adlicio read those counts for 8 protein powders on 12 November 2026 and added them up. Nothing is estimated.
The products are 8 widely reviewed protein powders on Amazon US, each with at least 2,000 ratings. This is a sample, not every product in the category.
Amazon shows at most 8 topics for a product, so a topic that is missing for a product is not counted for it. One review can count under more than one topic.
Amazon names the same topic in different ways. These were put together: Taste (Taste, Unflavored, Vanilla); Mixing and clumping (Blendability, Clumping, Mixability); Texture (Consistency, Texture); Protein quality (Protein content, Protein quality).
Get this for your own product
Connect Adlicio to Claude or ChatGPT, paste an Amazon product link and get its complaint topics with counts and review lines for each topic. It works the same way for a competitor's product.
What do customers complain about most in protein powder reviews?+
Taste. It has 7,126 negative mentions, 41.7% of all negative mentions across 8 widely reviewed protein powders on Amazon (November 2026). Quality has 2,289 and mixing and clumping has 2,285.
Which protein powder complaint is the most one-sided?+
Quantity. 80% of the reviews that mention it are negative (352 of 442).
Where do these numbers come from?+
From Amazon's review highlights. For each product, Amazon groups what reviewers write into topics and counts the positive and the negative mentions. Adlicio read those counts on 12 November 2026 and added them up for 8 products.
Can I get the same data for my own product?+
Yes. Connect Adlicio to Claude or ChatGPT and paste the product's Amazon link. The answer has the topics with their counts and review lines for each topic. Amazon research needs the Starter plan or higher.
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