---
title: "Casein Protein Powder — £206K/yr Amazon UK Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/uk/health-personal-care/casein-protein-powder"
last_updated: "2026-07-31T09:27:40.026Z"
locale: en
meta:
description: "Niche score 54/100 · £206K/yr market. Brand-locked demand (top 5 brands take 95% of clicks) keeps it on the watch list. Data updated Jul 2026."
"og:description": "Niche score 54/100 · £206K/yr market. Brand-locked demand (top 5 brands take 95% of clicks) keeps it on the watch list. Data updated Jul 2026."
"og:title": "Casein Protein Powder — £206K/yr Amazon UK Niche (2026) - Flapen"
---
# **casein protein powder**
**Worth a look**
Shows low returns (0.1%), but brand-locked demand (top 5 brands take 95% of clicks) keeps it on the watch list.
Market size 40Growth 17Conversion 32Competition 78Returns 100Price range 86Avg price 95Brand share 12Review moat 49Quality gap 75
**Returns**
**Incredible****0.1%**
return rate — above 5% kills the launch gate
**Avg price**
**Incredible****£26.64**
avg listing price — sweet spot $15–$100
**Price range**
**Great****£9.58–£56.89**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Competition**
**Great****37%**
top-5 click share — an open shelf
**Quality gap**
**Great****4.3★**
avg incumbent rating — lower means beatable quality
**Review moat**
**Okay****1,600.1**
avg incumbent reviews — the moat a new listing must climb
**Market size**
**Okay****£206K**
£206K/yr · 301K searches
**Conversion**
**Okay****2.6%**
search→purchase rate — share of searches ending in a sale
**Growth**
**Bad****-16.7%**
90-day search growth — must beat 0% to launch
**Brand share**
**Bad****95%**
top-5 brand share — brand-locked demand
According to Flapen's Amazon United Kingdom niche tracking, casein protein powder is a £206K/yr Amazon United Kingdom market (301K searches/yr). The top 5 brands hold 95% of demand. Demand peaks in Mar–Apr–May. Verdict: Worth a look — 54/100.
Data updated Jul 24, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **casein protein powder market data**
- **Units sold / yr**
- **13K–15K**
- avg 100–250/product
- **Revenue / yr**
- **£333K–£400K**
- units × avg price
- **Conversion rate**
- **2.6%**
- **Avg BSR**
- **#118**
- **Page quality**
- **0%**
- **Prime**
- **90%**
- **Sponsored**
- **43%**
- **Out of stock**
- **20.4%**
- **Avg brand age**
- **72 months**
- **Avg seller age**
- **160 days**
## **Competition & brand share**
Clicks spread well past the top 5 (37% combined) — an open shelf where new products get seen.
**Brands**
**12 **▲rising
**Sellers**
**59**
**Top-5 brand share**
**95%**
Top 20: 100%
**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 & seasonality**
Weekly Amazon search volume, last 104 weeks — -16.7% search growth over the last 90 days.
7K5KSpike '25Spike '26 seasonSepDecMarJunAugNovMarMay
Peak months: Mar, Apr, May · busiest ÷ quietest = 2.7×
[**Open Trend **](https://flapen.com/research/uk/health-personal-care/casein-protein-powder/trend)
## **Top casein protein powder search terms**
- **casein protein powder**72K/yr-5.3%4.6% conv. - **pbn protein powder**81K/yr-30.8%2.6% conv. - **casein protein**25K/yr-6.7%2.9% conv. - **casein**26K/yr-16.4%4.4% conv. - **pbn whey protein**23K/yr-24.0%1.9% conv. - **pbn**13K/yr-24.7%2.2% conv. - **casein powder**8K/yr+13.2%3.9% conv. - **pbn protein**6K/yr+8.3%2.0% conv. - **micellar casein**6K/yr+32.4%3.8% conv. - **pbn whey protein powder**4K/yr+22.1%2.6% conv. [**All search terms **](https://flapen.com/research/uk/health-personal-care/casein-protein-powder/search-terms)
## **Top casein protein powder products on Amazon**
Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.
0%3%£6K6%£12K9%£19K12%£25K101001K10K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 24 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**PBN - Premium Body Nutrition Micellar Casein Chocolate 1kg Pouch**Premium Body Nutrition**£12.67**4.2★1,117 rev](https://www.amazon.co.uk/dp/B07KZ6PJK7) [2**Optimum Nutrition Gold Standard Casein Slow Digesting Protein Powder with Zinc Magnesium and Naturally Occurring Glutamine and Amino Acids Cookies & Cream 28 Servings 0.92 kg Packaging May Vary**Optimum Nutrition**£31.69**4.5★473 rev](https://www.amazon.co.uk/dp/B00QMSSHWC) [3**Applied Nutrition Casein Protein Powder - Micellar Casein Supplement Slow Release Protein (900g - 30 Servings) (Vanilla Cream)**Applied Nutrition**£20.28**4.4★66 rev](https://www.amazon.co.uk/dp/B0CB3V3TSR) [4**PBN - Premium Body Nutrition Micellar Casein 2kg Strawberry**Premium Body Nutrition**£25.15**4.1★269 rev](https://www.amazon.co.uk/dp/B07ZV17XFL) [5**PBN - Premium Body Nutrition Micellar Casein 2kg Vanilla**Premium Body Nutrition**£23.08**4.3★694 rev](https://www.amazon.co.uk/dp/B07ZV17JDT)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Applied Nutrition Casein Protein Powder - Micellar Casein Supplement Slow Release Protein (1.8kg - 60 Servings) (Chocolate Cream)**Applied Nutrition**£38.35**58 rev1y ago](https://www.amazon.co.uk/dp/B0DQVBD2PS) [**Applied Nutrition Casein Protein Powder - Micellar Casein Supplement Slow Release Protein (900g - 30 Servings) (Vanilla Cream)**Applied Nutrition**£20.28**66 rev3y ago](https://www.amazon.co.uk/dp/B0CB3V3TSR) [**Applied Nutrition Casein Protein Powder - Micellar Casein Supplement Slow Release Protein (900g - 30 Servings) (Chocolate Cream)**Applied Nutrition**£21.33**58 rev3y ago](https://www.amazon.co.uk/dp/B0CB3TRPJR) [**Bulk Micellar Casein Protein Powder Vanilla 500g**Bulk**£12.48**390 rev4y ago](https://www.amazon.co.uk/dp/B07NZ71RFJ) [**PBN - Premium Body Nutrition Micellar Casein Chocolate 1kg Pouch**Premium Body Nutrition**£12.67**1,117 rev6y ago](https://www.amazon.co.uk/dp/B07KZ6PJK7)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**PBN - Premium Body Nutrition Micellar Casein Vanilla 1kg Pouch**Premium Body Nutrition**£13.60**4.4★**▲ 233%**](https://www.amazon.co.uk/dp/B07KZ6YYDG) [**PBN - Premium Body Nutrition Whey Protein Powder 2.27kg Cookies & Cream**Premium Body Nutrition**£29.74**4.4★**▲ 233%**](https://www.amazon.co.uk/dp/B08L76DNNR) [**PBN - Premium Body Nutrition - Whey-Isolate Protein Powder 1kg Cookies & Cream - 33 Servings**Premium Body Nutrition**£22.71**4.2★**▲ 232%**](https://www.amazon.co.uk/dp/B07W9DZBLR) [**Applied Nutrition Casein Protein Powder - Micellar Casein Supplement Slow Release Protein (1.8kg - 60 Servings) (Chocolate Cream)**Applied Nutrition**£38.35**4.3★**▲ 152%**](https://www.amazon.co.uk/dp/B0DQVBD2PS) [**PBN - Premium Body Nutrition Micellar Casein Chocolate 1kg Pouch**Premium Body Nutrition**£12.67**4.2★**▲ 119%**](https://www.amazon.co.uk/dp/B07KZ6PJK7)
**~~View all trending →~~**
## **What buyers say about casein protein powder**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Taste-Overall**19%
*“ABSOLUTELY DELICIOUS”*
**Nutritional Content**18%
*“Excellent protein powders”*
**Quality-Overall**10%
*“Excellent product”*
**Value For Money**10%
*“Good value for money”*
**Flavor**8%
*“Love the vanilla flavour”*
**Blend/Ratio**7%
*“and it blends pretty well”*
**Solubility**4%
*“Mixes easily”*
**Sweetness**2%
*“Extremely sweet”*
**Advertised Vs Actual Product**2%
*“It seemed to do the job”*
**Texture/Consistency-Overall**2%
*“appears a good consistency”*
### **What buyers complain about **
**Taste-Overall**22%
*“not as tasty”*
**Nutritional Content**8%
*“Nutritional information incorrect”*
**Flavor**7%
*“Absolutely disgusting, banana flavour”*
**Texture/Consistency-Overall**7%
*“Unpleasant Texture”*
**Sweetness**3%
*“Sugar 0”*
**Quality-Overall**3%
*“However, the Vanilla's quality is very bad”*
**Value For Money**2%
*“very expensive”*
**Smell**2%
*“Disgusting chemical smell made it not edible”*
**Advertised Vs Actual Product**2%
*“False advertising”*
**Salt Content**1%
*“nearly 3gms of salt per serving - phots are blurred so cant see untill you twice it”*
## **Common questions**
- **Is casein protein powder profitable to sell on Amazon United Kingdom?**
- The niche generates £206K/yr across 40 tracked products. 1 of 2 products launched in the last 360 days are still selling. 90-day search growth is -16.7%. Flapen's verdict: Worth a look (54/100).
- **How competitive is the casein protein powder niche?**
- 12 brands and 59 sellers compete. The top 5 products take 37% of clicks and top 5 brands hold 95% of demand.
- **What do buyers complain about in casein protein powder?**
- Top complaints mined from reviews: Taste-Overall, Nutritional Content, Flavor. The return rate is 0.1%.
- **When does demand for casein protein powder peak?**
- Demand peaks in Mar–Apr–May; the busiest month runs 2.7× the quietest.
- **What does it cost to enter the casein protein powder niche?**
- Listings span £9.58–£56.89; the average listing price is £26.64 (sweet spot $15–$100). The average incumbent carries 1,600 reviews — the moat a new listing must climb.
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