phd
Worth a lookShows low returns (0.1%), but brand-locked demand (top 5 brands take 99% of clicks) keeps it on the watch list.
Returns
Incredible0.1%return rate — above 5% kills the launch gate
Avg price
Great£19.25avg listing price — sweet spot $15–$100
Price range
Great£9.10–£35.49cheapest to priciest tracked listing — scored on the share inside $15–$100
Conversion
Good6.7%search→purchase rate — share of searches ending in a sale
Quality gap
Good4.3★avg incumbent rating — lower means beatable quality
Market size
Good£550K£550K/yr · 428K searches
Review moat
Good1,320.35avg incumbent reviews — the moat a new listing must climb
Competition
Okay62%top-5 click share — leaders hold, buyers still browse
Growth
Bad-16.9%90-day search growth — must beat 0% to launch
Brand share
Bad99%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
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.No pronounced peak months · busiest ÷ quietest = 1.9×
Top phd search terms
- diet protein powder100K/yr
- diet whey protein powder77K/yr
- phd diet whey68K/yr
- phd protein powder40K/yr
- diet whey25K/yr
- diet protein18K/yr
- phd diet whey protein powder17K/yr
- protein powder diet13K/yr
- diet whey protein12K/yr
- phd16K/yr
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.
All 23 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share![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£19.214.4★4,084 rev
PhD Nutrition Diet Whey Lean Protein Powder Belgian Chocolate 1 Kg Bag Vegetarian
PhD£19.994.3★4,473 rev
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£9.254.3★460 rev
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£9.134.4★271 rev
PhD Nutrition Diet Whey High Protein Lean Matrix Belgian Chocolate Whey Protein Powder High Protein 80 Servings Per 2 kg Bag
PhD£33.844.4★2,340 rev
Newest
by launch date
PhD Whey Protein Powder - High Protein Shake with Bacillus Coagulans - Supports Muscle Growth and Maintenance - Chocolate - 1kg
PhD£24.67740 rev
PhD Whey Protein Powder - High Protein Shake with Bacillus Coagulans - Supports Muscle Growth and Maintenance - Chocolate - 500g
PhD£13.72740 rev
PhD Whey Protein Powder - High Protein Shake with Bacillus Coagulans - Supports Muscle Growth and Maintenance - Vanilla - 500g
PhD£14.25740 rev
PhD Whey Protein Powder - High Protein Shake with Bacillus Coagulans - Supports Muscle Growth and Maintenance - Vanilla - 1kg
PhD£23.86740 rev
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£9.62188 rev
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£9.104.3★
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£33.803.9★
SCI-MX Diet Whey Protein Powder + Vitamins & Green Tea CLA & L-Carnitine - Strawberry Low Sugar 22g Protein + 110 Calories per Serving 800g
SCI-MX£14.114.4★
PhD Nutrition Diet Plant Vegan Protein Powder Plant Based Strawberries and Cream High Plant Protein 40 Servings Per 1 kg Bag.
PhD£18.564.0★
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£35.494.4★
What buyers say about phd
What buyers praise and complain about, mined from review topics.What buyers love
“it tastes delicious”
“Great protein powder”
“Creamy flavour and mixes well”
“Reliable seller of a quality item”
“Good value for money”
“Sweet drink”
“Mixes really well”
“Brilliant product, has worked wonders for me on my weight loss journey, easy to use, does exactly what it says on the packet”
“The powder does mix well”
“Easy to use”
What buyers complain about
“Taste like crap”
“slightly weak flavour”
“The texture is also a bit gritty”
“very watery when made as per the instructions”
“Also not great for anyone with IBS”
“Sickly sweet”
“Too thick”
“Beware new and improved”
“Why put in artificial sweeteners”
“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.