Selenium
FailPrices span $4.81–$13.87, mostly outside the sweet spot, so Selenium is a Fail.
- Flapen Score
- 44 / 100Ranks 1,348 of 2,035 Health & Personal Care niches · −4 vs the category median of 4844
- 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.
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.
Top sellers
by estimated 90-day click share
Selenium Supplements 200mcg - 365 Tablets - 1 Year Supply - Bioavailable Sodium Selenite Form - 1-a-Day - Small in Size (6mm) - Vegan & Non-GMO Selenium Tablets
- Price
- £7.85
- Rating
- 4.5/5
- Reviews
- 3,300
- Age
- 5y ago

Solgar Selenium (Yeast-Free) 200 g Tablets - Pack of 50 - Healthy Hair and Nails - Supports the Immune System - Vegan and Gluten Free
- Price
- £8.03
- Rating
- 4.7/5
- Reviews
- 2,521
- Age
- 15y ago

Selenium Tablets - 365 Vegan Selenium Tablets 200g Per Serving - Supports Normal Immune System & Thyroid Function - 12 Month Supply Made in The UK By New Leaf
- Price
- £8.19
- Rating
- 4.8/5
- Reviews
- 79
- Age
- 9mo ago

Nutravita Selenium Supplements 250mcg ACE with Vitamin A C & E - 400 Vegan Tablets (1+ Year Supply) - Support Normal Function of Immune System & Thyroid - Support Hair Skin & Nails - Made in the UK
- Price
- £4.81
- Rating
- 4.6/5
- Reviews
- 184
- Age
- 11mo ago

Zipvit Selenium 200mcg with Vitamins A C E. 180 Vegan Tablets. Supports Normal Thyroid Skin Hair & Nails Immune System and Antioxidant Protection. 6 Month Supply. UK Supplier.
- Price
- £6.62
- Rating
- 4.6/5
- Reviews
- 2,134
- Age
- 9y ago
Trending
estimated 90-day click momentum
Biotin Hair Growth Supplement - 180 Vegan Tablets Enhanced with Zinc & Selenium Hair Vitamins Complex - Biotin 10000 mcg - Hair Skin and Nails Vitamins for Women & Men UK (Packaging Design May Vary)
- Price
- £5.66
- Rating
- 4.4/5
- Reviews
- 12,621
- Age
- 5y ago

Selenium Tablets - 365 Vegan Selenium Tablets 200g Per Serving - Supports Normal Immune System & Thyroid Function - 12 Month Supply Made in The UK By New Leaf
- Price
- £8.19
- Rating
- 4.8/5
- Reviews
- 79
- Age
- 9mo ago

Nutravita Selenium Supplements 250mcg ACE with Vitamin A C & E - 400 Vegan Tablets (1+ Year Supply) - Support Normal Function of Immune System & Thyroid - Support Hair Skin & Nails - Made in the UK
- Price
- £4.81
- Rating
- 4.6/5
- Reviews
- 184
- Age
- 11mo ago

Selenium 200mcg - 180 Tablets Yeast Free L-Selenomethionine Supplements Natural Immune System & Thyroid - Resealable and Recyclable Pouch by Alpha01
- Price
- £4.93
- Rating
- 4.5/5
- Reviews
- 96
- Age
- 6y ago

Pure Encapsulations Selenium 200ug - Selenomethionine Supplement for Immune and Thyroid Function Support - 60 Vegetarian Capsules
- Price
- £12.26
- Rating
- 4.7/5
- Reviews
- 238
- Age
- 7y ago
Newest
by launch date
Selenium Tablets - 365 Vegan Selenium Tablets 200g Per Serving - Supports Normal Immune System & Thyroid Function - 12 Month Supply Made in The UK By New Leaf
- Price
- £8.19
- Rating
- 4.8/5
- Reviews
- 79
- Age
- 9mo ago

Nutravita Selenium Supplements 250mcg ACE with Vitamin A C & E - 400 Vegan Tablets (1+ Year Supply) - Support Normal Function of Immune System & Thyroid - Support Hair Skin & Nails - Made in the UK
- Price
- £4.81
- Rating
- 4.6/5
- Reviews
- 184
- Age
- 11mo ago

Solaray Selenium 200mcg 90 Vegan Capsules L-Selenomethionine Supplement
- Price
- £6.32
- Rating
- 4.6/5
- Reviews
- 48
- Age
- 1y ago

Selenium 200g - 120 Capsules 4 Month Supply as Selenomethionine the Naturally Occurring Form with Superior bioavailability - Made in the UK
- Price
- £7.87
- Rating
- 4.5/5
- Reviews
- 197
- Age
- 2y ago

Selenium Supplements 200mcg - 365 Tablets - 1 Year Supply - Bioavailable Sodium Selenite Form - 1-a-Day - Small in Size (6mm) - Vegan & Non-GMO Selenium Tablets
- Price
- £7.85
- Rating
- 4.5/5
- Reviews
- 3,300
- Age
- 5y ago
Competition
Competition: brands, sellers & click share
The top 5 products take an estimated 71% of clicks. A locked shelf that new listings rarely crack.
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.
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.
“Did not work”
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
Keep looking
Related niches
Niches in the same category that score near this one. Research these next.
Best Flapen score
The highest-scoring niches we track right now, across every category.
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









