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Selenium

Fail

Prices span $4.81–$13.87, mostly outside the sweet spot, so Selenium is a Fail.

Flapen Score
44
44 / 100
Ranks 1,348 of 2,035 Health & Personal Care niches · −4 vs the category median of 48
Market size
£207K/yr176K searches / yr
90-day growth
-13.6%search demand this quarter
Competition
71%top-5 click share · 12 brands · 16 sellers

Flapen Score

Selenium against its category

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

44Fail
Big MarketTrendingHigh ConversionOpen MarketLow ReturnsPrice rangeAvg priceNo Dominant BrandLow Review BarrierQuality Gap
This niche Category average

Market

The Selenium market on Amazon at a glance

Shoppers on Amazon United Kingdom searched for Selenium 176K times last year and spent an estimated £207K. The top 5 brands take 71% of clicks. Flapen scores it 44 out of 100, a Fail.

01 · Demand

An estimated 15.0% of those searches ended in a purchase.

Shoppers searched for this 176K times in the last 12 months. That counts every search on Amazon United Kingdom for this niche's terms. An estimated 15.0% of those searches ended in a purchase. Searches in the last 90 days moved -13.6% against the 90 days before. Searches, conversion and average price together put the market at an estimated £207K a year.

Searches, last 12 months
176K
Growth, 90 days vs prior 90
-13.6%
Conversion, latest week
15.0%
Market size, estimated
£207Ka year
Peak month
September1.3× the quietest month
Top search term
selenium109K searches a year

02 · Price

A sale here is worth £7.83.

Listings sell for £7.83 on average, from £4.81 to £13.87. Amazon reports units sold in ranges. This niche sold 25K to 30K a year. The average listing sells 1,500 to 2,000 of them. At £7.83 that is £12K to £16K a year per listing.

Average price
£7.83under the $15 to $100 sweet spot
Price range
£4.81–£13.87
Amazon United Kingdom median price
£12.12across 27,606 niches
Units sold a year
25K–30K
Units per listing a year
1,500–2,000
Revenue per listing a year
£12K–£16K
Returns
0.0%of orders · Amazon United Kingdom median 0.6%

03 · Entry bar

The bar here is reviews.

83% of listings pay for placement with sponsored ads. 100% ship with Prime. On an average day, 7.7% of listings are out of stock. The average listing ranks #7 within Minerals. It carries 2,010 reviews at 4.59 stars, so a new listing needs social proof before a better product.

Sponsored listings
83%
Prime listings
100%
Out of stock, average day
7.7%
Average rank
#7in Minerals
Average rating
4.59 starsAmazon United Kingdom average 4.36 stars
Average reviews
2,010per listing
Listings tracked
12

04 · Newcomers

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

2 products launched here in the last 12 months. 0 of them cleared the first-year sales bar, our mark for a successful launch. The brands on the shelf have sold for 66 months on average, so the names here are established.

Launched, last 12 months
2
Successful launches
0Amazon's first-year sales bar
Average brand age
66 months

Products

Top Selenium 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 25, 2026. The live listing can differ.

Competition

Competition: brands, sellers & click share

The top 5 products take an estimated 71% of clicks. A locked shelf that new listings rarely crack.

£0£21K£41K£62K£83K101001K10K100K Review Count Sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

Brands

12 rising

Sellers

16

Est. top-5 brand share

71%

Top 20: 100%

Est. top-5 click share

71%

Top 20: 100%

Open market

22%

  • WeightWorld34%
  • Solgar13%
  • NEW LEAF PRODUCTS10%
  • Nutravita7%
  • Zipvit7%
  • Horbäach6%

Demand

Selenium search demand

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

4K3KSpike '25SepDecMarJunAugNovMarMay

No pronounced peak months · busiest ÷ quietest = 1.3×

Search terms

Top Selenium search terms shoppers use

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

  • selenium109K/yr
  • selenium supplements52K/yr
  • selenium 200mcg5K/yr
  • selenomethionine3K/yr
  • selen4K/yr
  • selenium supplement3K/yr

Reviews and returns

What reviews say buyers love and hate about Selenium

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

21%of positive reviews mention “Hair Growth”
15%of negative reviews mention “Functionality-Overall”
<0.1%of orders come back, a rate Amazon rounds to zero
“Did not work”
A buyer, on “Functionality-Overall”15% 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.

16 topics

NegativePositive

FAQ

Common Selenium 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