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Phd

Maybe

An estimated 0.1% of orders come back. But the top 5 brands take 99% of clicks, so Phd is a Maybe.

Flapen Score
53
53 / 100
Top 29% of 2,035 Health & Personal Care niches · +5 vs the category median of 48
Market size
£550K/yr428K searches / yr
90-day growth
-16.9%search demand this quarter
Competition
62%top-5 click share · 6 brands · 37 sellers

Flapen Score

Phd against its category

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

53Maybe
Big MarketTrendingHigh ConversionOpen MarketLow ReturnsPrice rangeAvg priceNo Dominant BrandLow Review BarrierQuality Gap
This niche Category average

Market

The Phd market on Amazon at a glance

Shoppers on Amazon United Kingdom searched for Phd 428K times last year and spent an estimated £550K. The top 5 brands take 99% of clicks. Flapen scores it 53 out of 100, a Maybe.

01 · Demand

An estimated 6.7% of those searches ended in a purchase.

Shoppers searched for this 428K times in the last 12 months. That counts every search on Amazon United Kingdom for this niche's terms. An estimated 6.7% of those searches ended in a purchase. Searches in the last 90 days moved -16.9% against the 90 days before. Searches, conversion and average price together put the market at an estimated £550K a year.

Searches, last 12 months
428K
Growth, 90 days vs prior 90
-16.9%
Conversion, latest week
6.7%
Market size, estimated
£550Ka year
Peak month
February1.9× the quietest month
Top search term
diet protein powder100K searches a year

02 · Price

A sale here is worth £19.25.

Listings sell for £19.25 on average, from £9.10 to £35.49. Amazon reports units sold in ranges. This niche sold 20K to 25K a year. The average listing sells 500 to 750 of them. At £19.25 that is £10K to £14K a year per listing.

Average price
£19.25inside the $15 to $100 sweet spot
Price range
£9.10–£35.49
Amazon United Kingdom median price
£12.12across 27,606 niches
Units sold a year
20K–25K
Units per listing a year
500–750
Revenue per listing a year
£10K–£14K
Returns
0.1%of orders · Amazon United Kingdom median 0.6%

03 · Entry bar

The bar here is low.

78% of listings pay for placement with sponsored ads. 96% ship with Prime. On an average day, 2.6% of listings are out of stock. The average listing ranks #46 within Diet & Nutrition. It carries 1,320 reviews at 4.33 stars, so a new listing needs social proof before a better product.

Sponsored listings
78%
Prime listings
96%
Out of stock, average day
2.6%
Average rank
#46in Diet & Nutrition
Average rating
4.33 starsAmazon United Kingdom average 4.36 stars
Average reviews
1,320per listing
Listings tracked
23

04 · Newcomers

Brands here are settling in.

The brands on the shelf have sold for 58 months on average, so the names here are settling in.

Launched, last 12 months
0
Successful launches
0Amazon's first-year sales bar
Average brand age
58 months

Products

Top Phd 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 62% of clicks. Leaders hold, but buyers still shop past them.

£0£55K£110K£165K£220K101001K10K Review Count Sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

Brands

6 falling

Sellers

37

Est. top-5 brand share

99%

Top 20: 100%

Est. 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

Phd search demand

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

13K8KSpike '24Spike '25Prime Day '25Spike '26SepDecMarJunAugNovMarMay

No pronounced peak months · busiest ÷ quietest = 1.9×

Search terms

Top Phd search terms shoppers use

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

  • 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

Reviews and returns

What reviews say buyers love and hate about Phd

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

28%of positive reviews mention “Taste-Overall”
35%of negative reviews mention “Taste-Overall”
0.1%of orders come back
“Taste like crap”
A buyer, on “Taste-Overall”35% 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.

15 topics

NegativePositive

FAQ

Common Phd 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