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Casein Protein Powder

Maybe

An estimated 0.1% of orders come back. But the top 5 brands take 95% of clicks, so Casein Protein Powder is a Maybe.

Flapen Score
54
54 / 100
Top 25% of 2,035 Health & Personal Care niches · +6 vs the category median of 48
Market size
£206K/yr301K searches / yr
90-day growth
-16.7%search demand this quarter
Competition
37%top-5 click share · 12 brands · 59 sellers

Flapen Score

Casein Protein Powder against its category

The dotted line is the Health & Personal Care average. Past it, Casein Protein Powder is stronger. Inside it, weaker.

54Maybe
Big MarketTrendingHigh ConversionOpen MarketLow ReturnsPrice rangeAvg priceNo Dominant BrandLow Review BarrierQuality Gap
This niche Category average

Market

The Casein Protein Powder market on Amazon at a glance

Shoppers on Amazon United Kingdom searched for Casein Protein Powder 301K times last year and spent an estimated £206K. The top 5 brands take 95% of clicks. Demand peaks in Mar–Apr–May. Flapen scores it 54 out of 100, a Maybe.

01 · Demand

An estimated 2.6% of those searches ended in a purchase.

Shoppers searched for this 301K times in the last 12 months. That counts every search on Amazon United Kingdom for this niche's terms. An estimated 2.6% of those searches ended in a purchase. Searches in the last 90 days moved -16.7% against the 90 days before. Searches, conversion and average price together put the market at an estimated £206K a year.

Searches, last 12 months
301K
Growth, 90 days vs prior 90
-16.7%
Conversion, latest week
2.6%
Market size, estimated
£206Ka year
Peak month
March2.7× the quietest month
Top search term
casein protein powder72K searches a year

02 · Price

A sale here is worth £26.64.

Listings sell for £26.64 on average, from £9.58 to £56.89. Amazon reports units sold in ranges. This niche sold 13K to 15K a year. The average listing sells 100 to 250 of them. At £26.64 that is £3K to £7K a year per listing.

Average price
£26.64inside the $15 to $100 sweet spot
Price range
£9.58–£56.89
Amazon United Kingdom median price
£12.12across 27,606 niches
Units sold a year
13K–15K
Units per listing a year
100–250
Revenue per listing a year
£3K–£7K
Returns
0.1%of orders · Amazon United Kingdom median 0.6%

03 · Entry bar

The bar here is reviews.

43% of listings pay for placement with sponsored ads. 90% ship with Prime. On an average day, 20.4% of listings are out of stock. The average listing ranks #118 within Diet & Nutrition. It carries 1,600 reviews at 4.30 stars, so a new listing needs social proof before a better product.

Sponsored listings
43%
Prime listings
90%
Out of stock, average day
20.4%
Average rank
#118in Diet & Nutrition
Average rating
4.30 starsAmazon United Kingdom average 4.36 stars
Average reviews
1,600per listing
Listings tracked
40

04 · Newcomers

1 of last year's 2 launches cleared the first-year sales bar.

2 products launched here in the last 12 months. 1 of them cleared the first-year sales bar, our mark for a successful launch. The brands on the shelf have sold for 72 months on average, so the names here are established.

Launched, last 12 months
2
Successful launches
1Amazon's first-year sales bar
Average brand age
72 months

Products

Top Casein Protein Powder products & what they sell for

The products selling here, as shoppers see them on Amazon. Shelf share and sales are our estimates.

Prices and ratings read from Amazon on Jul 24, 2026. The live listing can differ.

Competition

Competition: brands, sellers & click share

The top 5 products take an estimated 37% of clicks, no more. An open shelf where new products get seen.

£0£6K£12K£19K£25K101001K10K Review Count Sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

Brands

12 rising

Sellers

59

Est. top-5 brand share

95%

Top 20: 100%

Est. top-5 click share

37%

Top 20: 83%

Open market

4%

  • Premium Body Nutrition46%
  • Optimum Nutrition18%
  • Applied Nutrition15%
  • Bulk14%
  • BULK POWDERS2%
  • Dymatize1%
  • Open — no brand owns it (6 brands, 4%)

Demand

Casein Protein Powder search demand

Weekly searches over the year, seasonality beneath. Pick a range.

7K5KSpike '25Spike '26SepDecMarJunAugNovMarMay

Peak months: Mar, Apr, May · busiest ÷ quietest = 2.7×

Search terms

Top Casein Protein Powder search terms shoppers use

The exact words shoppers type, with estimated yearly volume, growth, and conversion.

  • casein protein powder72K/yr
  • pbn protein powder81K/yr
  • casein protein25K/yr
  • casein26K/yr
  • pbn whey protein23K/yr
  • pbn13K/yr
  • casein powder8K/yr
  • pbn protein6K/yr
  • micellar casein6K/yr
  • pbn whey protein powder4K/yr

Reviews and returns

What reviews say buyers love and hate about Casein Protein Powder

We read the reviews and the return reasons for every product selling here.

19%of positive reviews mention “Taste-Overall”
22%of negative reviews mention “Taste-Overall”
0.1%of orders come back
“not as tasty”
A buyer, on “Taste-Overall”22% of negative reviews mention the same topic

Every topic

Every topic buyers talk about, one row each.

Red shows the share of negative reviews and green the share of positive reviews, biggest topic first. Open a row to read what they wrote.

12 topics

NegativePositive

FAQ

Common Casein Protein Powder questions

Answered from the same tracked data.

Figures on this page are estimates modeled from public Amazon pages and third-party keyword data. Amazon does not supply them, and no connected seller's data is used. How we handle Amazon data