Selenium
MaybeAn estimated 0.0% of orders come back. But demand is soft, at -8.8% this quarter, so Selenium is a Maybe.
- Flapen Score
- 62 / 100Top 8% of 14,768 Health & Household niches · +13 vs the category median of 4962
- Market size
- $3.7M/yr1.6M searches / yr
- 90-day growth
- -8.8%search demand this quarter
- Competition
- 51%top-5 click share · 16 brands · 35 sellers
Flapen Score
Selenium against its category
The dotted line is the Health & Household average. Past it, Selenium is stronger. Inside it, weaker.
Market
The Selenium market on Amazon at a glance
Shoppers on Amazon United States searched for Selenium 1.6M times last year and spent an estimated $3.7M. The top 5 brands take 70% of clicks. Flapen scores it 62 out of 100, a Maybe.
01 · Demand
An estimated 13.8% of those searches ended in a purchase.
Shoppers searched for this 1.6M times in the last 12 months. That counts every search on Amazon United States for this niche's terms. An estimated 13.8% of those searches ended in a purchase. Searches in the last 90 days moved -8.8% against the 90 days before. Searches, conversion and average price together put the market at an estimated $3.7M a year.
- Searches, last 12 months
- 1.6M
- Growth, 90 days vs prior 90
- -8.8%
- Conversion, latest week
- 13.8%
- Market size, estimated
- $3.7Ma year
- Peak month
- January1.3× the quietest month
- Top search term
- selenium944K searches a year
02 · Price
A sale here is worth $16.40.
Listings sell for $16.40 on average, from $4.99 to $35.95. Amazon reports units sold in ranges. This niche sold 200K to 250K a year. The average listing sells 8,000 to 10,000 of them. At $16.40 that is $131K to $164K a year per listing.
- Average price
- $16.40inside the $15 to $100 sweet spot
- Price range
- $4.99–$35.95
- Amazon United States median price
- $24.38across 115,062 niches
- Units sold a year
- 200K–250K
- Units per listing a year
- 8,000–10,000
- Revenue per listing a year
- $131K–$164K
- Returns
- 0.0%of orders · Amazon United States median 2.1%
03 · Entry bar
The bar here is reviews.
78% of listings pay for placement with sponsored ads. 100% ship with Prime. On an average day, 0.0% of listings are out of stock. The average listing ranks #84 within Selenium. It carries 4,396 reviews at 4.63 stars, so a new listing needs social proof before a better product.
- Sponsored listings
- 78%
- Prime listings
- 100%
- Out of stock, average day
- 0.0%
- Average rank
- #84in Selenium
- Average rating
- 4.63 starsAmazon United States average 4.42 stars
- Average reviews
- 4,396per listing
- Listings tracked
- 23
04 · Newcomers
Brands here are established.
The brands on the shelf have sold for 83 months on average, so the names here are established.
- Launched, last 12 months
- 0
- Successful launches
- 0Amazon's first-year sales bar
- Average brand age
- 83 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 28, 2026. The live listing can differ.
Top sellers
by estimated 90-day click share
THORNE - Selenium - 200 mcg Selenium Supplement for Antioxidant Support - Supports Thyroid Health Immune Function & Healthy Aging - Third-Party Certified - Gluten Dairy & Soy-Free - 60 Capsules
- Price
- $13.53
- Rating
- 4.7/5
- Reviews
- 4,463
- Age
- 13y ago

Nutricost Selenium 200mcg 240 Vegetarian Capsules L-Selenomethionine
- Price
- $13.79
- Rating
- 4.7/5
- Reviews
- 3,684
- Age
- 8y ago

NOW Supplements Selenium (L-Selenomethionine) 100 mcg Essential Mineral* 100 Tablets
- Price
- $4.99
- Rating
- 4.7/5
- Reviews
- 4,266
- Age
- 22y ago

Bronson Selenium 200 mcg Yeast Free Chelated Amino Acid Complex - Essential Trace Mineral with Superior Absorption 250 Vegetarian Capsules
- Price
- $14.92
- Rating
- 4.7/5
- Reviews
- 14,686
- Age
- 9y ago

Pure Encapsulations Selenium - 200 mcg - for Healthy Cellular Function Immune System & Antioxidant Defenses* - Mineral Supplement - Vegan & Gluten Free - 180 Capsules
- Price
- $35.95
- Rating
- 4.6/5
- Reviews
- 5,733
- Age
- 16y ago
Trending
estimated 90-day click momentum
Now Foods Selenium 200mcg Capsules 300 Count - L Selenomethionine Mineral Supplement for Women & Men - Veg Caps Non-GMO Vegan Friendly Yeast-Free
- Price
- $23.36
- Rating
- 4.6/5
- Reviews
- 7,820
- Age
- 5y ago

BulkSupplements.com Selenium Glycinate Capsules - Selenium Supplement Selenium 200mcg Capsules - Essential Trace Mineral Gluten Free 1 Capsule per Serving 500 Count (Pack of 1)
- Price
- $16.56
- Rating
- 4.6/5
- Reviews
- 170
- Age
- 2y ago

NOW Supplements Selenium (L-Selenomethionine) 100 mcg Essential Mineral* 100 Tablets
- Price
- $4.99
- Rating
- 4.7/5
- Reviews
- 4,266
- Age
- 22y ago

Selenium - 200 mcg Selenomethionine Form 300 Servings - Vegan Glass Bottle Yeast Free - Sublingual Liquid Concentrate - Antioxidant Supports Immunity Thyroid Health (2 oz.)
- Price
- $21.71
- Rating
- 4.5/5
- Reviews
- 1,423
- Age
- 6y ago

Life Extension Super Selenium Complex 200 mcg 3 Forms of Selenium Vitamin E Cellular Health & Longevity Support Gluten-Free Non-GMO Vegetarian 1 Daily 100 Capsules
- Price
- $9.63
- Rating
- 4.6/5
- Reviews
- 6,951
- Age
- 15y ago
Newest
by launch date
Selenium Supplements for Women & Men 200mcg Per Serving 500 Softgels | Made with Coconut Oil | Essential Trace Mineral as L-Selenomethionine | 16+ Month Supply | Non-GMO Gluten Free
- Price
- $21.63
- Rating
- 4.6/5
- Reviews
- 462
- Age
- 1y ago

NEW AGE Selenium Zinc Iodine L Tyrosine Ashwagandha - Supplement for Women and Men with Bladderwrack Turmeric Silica Kelp Schisandra - 120 Count
- Price
- $33.81
- Rating
- 4.5/5
- Reviews
- 1,179
- Age
- 1y ago

BulkSupplements.com Selenium Glycinate Capsules - Selenium Supplement Selenium 200mcg Capsules - Essential Trace Mineral Gluten Free 1 Capsule per Serving 500 Count (Pack of 1)
- Price
- $16.56
- Rating
- 4.6/5
- Reviews
- 170
- Age
- 2y ago

Horbach Selenium Supplement for Women & Men | 200mcg | 120 Tablets
- Price
- $6.75
- Rating
- 4.7/5
- Reviews
- 635
- Age
- 2y ago

Clean Nutra Selenium 300mcg Iodine 500mcg Thyroid Support for Women & Men | L Tyrosine 500mg Ashwagandha Supplement Bladderwrack Turmeric Kelp Schisandra Zinc Pills Capsule Supplements
- Price
- $25.41
- Rating
- 4.5/5
- Reviews
- 3,438
- Age
- 3y ago
Competition
Competition: brands, sellers & click share
The top 5 products take an estimated 51% of clicks. Leaders hold, but buyers still shop past them.
Brands
16 falling
Sellers
35
Est. top-5 brand share
70%
Top 20: 100%
Est. top-5 click share
51%
Top 20: 97%
Open market
24%
- THORNE18%
- Bronson17%
- Pure Encapsulations12%
- NOW Foods12%
- Nutricost11%
- Nature's Bounty6%
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.
- selenium944K/yr
- selenium 200mcg capsules174K/yr
- selenium supplements for women183K/yr
- selenio54K/yr
- selenium 200mcg33K/yr
- selenium supplement60K/yr
- selenio organico para tiroides31K/yr
- selen38K/yr
- selenomethionine29K/yr
- selenio 200mg25K/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.
“it has disgusting smell”
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.
19 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









