---
title: "Phd — £550K/yr Amazon UK Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/uk/health-personal-care/phd"
last_updated: "2026-07-31T17:10:14.202Z"
locale: en
meta:
description: "Niche score 53/100 · £550K/yr market. Brand-locked demand (top 5 brands take 99% of clicks) keeps it on the watch list. Data updated Jul 2026."
"og:description": "Niche score 53/100 · £550K/yr market. Brand-locked demand (top 5 brands take 99% of clicks) keeps it on the watch list. Data updated Jul 2026."
"og:title": "Phd — £550K/yr Amazon UK Niche (2026) - Flapen"
---
# **phd**
**Worth a look**
Shows low returns (0.1%), but brand-locked demand (top 5 brands take 99% of clicks) keeps it on the watch list.
Market size 62Growth 17Conversion 72Competition 39Returns 100Price range 77Avg price 86Brand share 4Review moat 54Quality gap 70
**Returns**
**Incredible****0.1%**
return rate — above 5% kills the launch gate
**Avg price**
**Great****£19.25**
avg listing price — sweet spot $15–$100
**Price range**
**Great****£9.10–£35.49**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Conversion**
**Good****6.7%**
search→purchase rate — share of searches ending in a sale
**Quality gap**
**Good****4.3★**
avg incumbent rating — lower means beatable quality
**Market size**
**Good****£550K**
£550K/yr · 428K searches
**Review moat**
**Good****1,320.35**
avg incumbent reviews — the moat a new listing must climb
**Competition**
**Okay****62%**
top-5 click share — leaders hold, buyers still browse
**Growth**
**Bad****-16.9%**
90-day search growth — must beat 0% to launch
**Brand share**
**Bad****99%**
top-5 brand share — brand-locked demand
According to Flapen's Amazon United Kingdom niche tracking, phd is a £550K/yr Amazon United Kingdom market (428K searches/yr). The top 5 brands hold 99% of demand. Verdict: Worth a look — 53/100.
Data updated Jul 24, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **phd market data**
- **Units sold / yr**
- **20K–25K**
- avg 500–750/product
- **Revenue / yr**
- **£385K–£481K**
- units × avg price
- **Conversion rate**
- **6.7%**
- **Avg BSR**
- **#46**
- **Page quality**
- **0%**
- **Prime**
- **96%**
- **Sponsored**
- **78%**
- **Out of stock**
- **2.6%**
- **Avg brand age**
- **58 months**
- **Avg seller age**
- **154 days**
## **Competition & brand share**
The top 5 products take 62% of clicks — established leaders, but buyers still shop beyond them.
**Brands**
**6 **▼falling
**Sellers**
**37**
**Top-5 brand share**
**99%**
Top 20: 100%
**Top-5 click share**
**62%**
Top 20: 96%
**Open market**
**0%**
- PhD64% - Applied Nutrition27% - USN3% - The Bulk Protein Company2% - SCI-MX2% - Myprotein1% - Open — no brand owns it (0%)
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — -16.9% search growth over the last 90 days.
13K8KSpike '24Spike '25Prime Day '25Spike '26 seasonSepDecMarJunAugNovMarMay
No pronounced peak months · busiest ÷ quietest = 1.9×
[**Open Trend **](https://flapen.com/research/uk/health-personal-care/phd/trend)
## **Top phd search terms**
- **diet protein powder**100K/yr-2.5%3.8% conv. - **diet whey protein powder**77K/yr-18.7%4.3% conv. - **phd diet whey**68K/yr-1.4%9.4% conv. - **phd protein powder**40K/yr-19.1%6.1% conv. - **diet whey**25K/yr-20.9%4.4% conv. - **diet protein**18K/yr-19.6%3.9% conv. - **phd diet whey protein powder**17K/yr-24.3%10.5% conv. - **protein powder diet**13K/yr-31.1%3.9% conv. - **diet whey protein**12K/yr-8.4%4.0% conv. - **phd**16K/yr-36.4%2.6% conv. [**All search terms **](https://flapen.com/research/uk/health-personal-care/phd/search-terms)
## **Top phd 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%10%£55K20%£110K30%£165K40%£220K101001K10K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 23 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1![PhD Nutrition Diet Whey Lean Protein Powder | Vanilla Crème Whey Protein Powder 1 kg Bag [ Packaging May Vary ]](https://m.media-amazon.com/images/I/41pHGr2doiL.jpg)**PhD Nutrition Diet Whey Lean Protein Powder | Vanilla Crème Whey Protein Powder 1 kg Bag \[ Packaging May Vary \]**PhD**£19.21**4.4★4,084 rev](https://www.amazon.co.uk/dp/B003AXAG7G) [2**PhD Nutrition Diet Whey Lean Protein Powder Belgian Chocolate 1 Kg Bag Vegetarian**PhD**£19.99**4.3★4,473 rev](https://www.amazon.co.uk/dp/B003AX6DRS) [3**Applied Nutrition Diet Whey - High Protein Powder Supplement Low Carb & Sugar for Weight Management with CLA L Carnitine Green Tea (450g - 18 Servings) (Vanilla)**Applied Nutrition**£9.25**4.3★460 rev](https://www.amazon.co.uk/dp/B084WP6Y51) [4**Applied Nutrition Diet Whey - High Protein Powder Supplement Low Carb & Sugar for Weight Management with CLA L Carnitine Green Tea (450g - 18 Servings) (Strawberry Milkshake)**Applied Nutrition**£9.13**4.4★271 rev](https://www.amazon.co.uk/dp/B084WR73HC) [5**PhD Nutrition Diet Whey High Protein Lean Matrix Belgian Chocolate Whey Protein Powder High Protein 80 Servings Per 2 kg Bag**PhD**£33.84**4.4★2,340 rev](https://www.amazon.co.uk/dp/B000KOSIX2)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**PhD Whey Protein Powder - High Protein Shake with Bacillus Coagulans - Supports Muscle Growth and Maintenance - Chocolate - 1kg**PhD**£24.67**740 rev1y ago](https://www.amazon.co.uk/dp/B0FG89W793) [**PhD Whey Protein Powder - High Protein Shake with Bacillus Coagulans - Supports Muscle Growth and Maintenance - Chocolate - 500g**PhD**£13.72**740 rev1y ago](https://www.amazon.co.uk/dp/B0FG87H6JB) [**PhD Whey Protein Powder - High Protein Shake with Bacillus Coagulans - Supports Muscle Growth and Maintenance - Vanilla - 500g**PhD**£14.25**740 rev1y ago](https://www.amazon.co.uk/dp/B0FG8BRCPM) [**PhD Whey Protein Powder - High Protein Shake with Bacillus Coagulans - Supports Muscle Growth and Maintenance - Vanilla - 1kg**PhD**£23.86**740 rev1y ago](https://www.amazon.co.uk/dp/B0FG8G8GVW) [**Applied Nutrition Diet Whey - High Protein Powder Supplement Low Carb & Sugar for Weight Management with CLA L Carnitine Green Tea (450g - 18 Servings) (Salted Caramel)**Applied Nutrition**£9.62**188 rev3y ago](https://www.amazon.co.uk/dp/B0BSXKFLG3)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Applied Nutrition Diet Whey - High Protein Powder Supplement Low Carb & Sugar for Weight Management with CLA L Carnitine Green Tea (450g - 18 Servings) (Chocolate Dessert)**Applied Nutrition**£9.10**4.3★**▲ 68%**](https://www.amazon.co.uk/dp/B0846WCFSF) [**Serious Shredz 4kg Diet Whey Protein Powder Contains L-Carnitine L-Tartrate and Green Tea Extract Supports Lean Muscle Growth 133 Servings The Bulk Protein Company (Double Chocolate)**The Bulk Protein Company**£33.80**3.9★**▲ 46%**](https://www.amazon.co.uk/dp/B08S34763L) [**SCI-MX Diet Whey Protein Powder + Vitamins & Green Tea CLA & L-Carnitine - Strawberry Low Sugar 22g Protein + 110 Calories per Serving 800g**SCI-MX**£14.11**4.4★**▲ 41%**](https://www.amazon.co.uk/dp/B0B1F914X5) [**PhD Nutrition Diet Plant Vegan Protein Powder Plant Based Strawberries and Cream High Plant Protein 40 Servings Per 1 kg Bag.**PhD**£18.56**4.0★**▲ 40%**](https://www.amazon.co.uk/dp/B08PDTJ6X6) [**PhD Nutrition Diet Whey Low Calorie Protein Powder Low Carb High Protein Lean Matrix Vanilla Crème Diet Whey Protein Powder High Protein 80 Servings Per 2 kg Bag**PhD**£35.49**4.4★**▲ 23%**](https://www.amazon.co.uk/dp/B004EM26HU)
**~~View all trending →~~**
## **What buyers say about phd**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Taste-Overall**28%
*“it tastes delicious”*
**Nutritional Content**16%
*“Great protein powder”*
**Flavor**9%
*“Creamy flavour and mixes well”*
**Quality-Overall**8%
*“Reliable seller of a quality item”*
**Value For Money**5%
*“Good value for money”*
**Sweetness**3%
*“Sweet drink”*
**Blend/Ratio**3%
*“Mixes really well”*
**Weight Loss**2%
*“Brilliant product, has worked wonders for me on my weight loss journey, easy to use, does exactly what it says on the packet”*
**Solubility**2%
*“The powder does mix well”*
**Ease Of Use**2%
*“Easy to use”*
### **What buyers complain about **
**Taste-Overall**35%
*“Taste like crap”*
**Flavor**7%
*“slightly weak flavour”*
**Texture/Consistency-Overall**5%
*“The texture is also a bit gritty”*
**Dilute/Watery**5%
*“very watery when made as per the instructions”*
**Nutritional Content**4%
*“Also not great for anyone with IBS”*
**Sweetness**3%
*“Sickly sweet”*
**Thickness**3%
*“Too thick”*
**Quality-Overall**2%
*“Beware new and improved”*
**Artificial Sweeteners**2%
*“Why put in artificial sweeteners”*
**Mixing/Blending**2%
*“DOES NOT MIX”*
## **Common questions**
- **Is phd profitable to sell on Amazon United Kingdom?**
- The niche generates £550K/yr across 23 tracked products. 90-day search growth is -16.9%. Flapen's verdict: Worth a look (53/100).
- **How competitive is the phd niche?**
- 6 brands and 37 sellers compete. The top 5 products take 62% of clicks and top 5 brands hold 99% of demand.
- **What do buyers complain about in phd?**
- Top complaints mined from reviews: Taste-Overall, Flavor, Texture/Consistency-Overall. The return rate is 0.1%.
- **When does demand for phd peak?**
- Demand is steady year-round — the busiest month runs 1.9× the quietest.
- **What does it cost to enter the phd niche?**
- Listings span £9.10–£35.49; the average listing price is £19.25 (sweet spot $15–$100). The average incumbent carries 1,320 reviews — the moat a new listing must climb.
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