Selenomethionine
FailThe top 5 brands take 97% of clicks, so Selenomethionine is a Fail.
- Flapen Score
- 45 / 100Ranks 9,665 of 14,768 Health & Household niches · −4 vs the category median of 4945
- Market size
- $327K/yr87K searches / yr
- 90-day growth
- -5.8%search demand this quarter
- Competition
- 91%top-5 click share · 6 brands · 17 sellers
Flapen Score
Selenomethionine against its category
The dotted line is the Health & Household average. Past it, Selenomethionine is stronger. Inside it, weaker.
Market
The Selenomethionine market on Amazon at a glance
Shoppers on Amazon United States searched for Selenomethionine 87K times last year and spent an estimated $327K. The top 5 brands take 97% of clicks. Demand peaks in Jan. Flapen scores it 45 out of 100, a Fail.
01 · Demand
An estimated 19.7% of those searches ended in a purchase.
Shoppers searched for this 87K times in the last 12 months. That counts every search on Amazon United States for this niche's terms. An estimated 19.7% of those searches ended in a purchase. Searches in the last 90 days moved -5.8% against the 90 days before. Searches, conversion and average price together put the market at an estimated $327K a year.
- Searches, last 12 months
- 87K
- Growth, 90 days vs prior 90
- -5.8%
- Conversion, latest week
- 19.7%
- Market size, estimated
- $327Ka year
- Peak month
- January1.9× the quietest month
- Top search term
- selenomethionine29K searches a year
02 · Price
A sale here is worth $19.10.
Listings sell for $19.10 on average, from $4.99 to $35.95. Amazon reports units sold in ranges. This niche sold 15K to 20K a year. The average listing sells 2,500 to 3,000 of them. At $19.10 that is $48K to $57K a year per listing.
- Average price
- $19.10inside 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
- 15K–20K
- Units per listing a year
- 2,500–3,000
- Revenue per listing a year
- $48K–$57K
- Returns
- 0.0%of orders · Amazon United States median 2.1%
03 · Entry bar
The bar here is reviews.
88% 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 #83 within Selenium. It carries 3,296 reviews at 4.64 stars, so a new listing needs social proof before a better product.
- Sponsored listings
- 88%
- Prime listings
- 100%
- Out of stock, average day
- 0.0%
- Average rank
- #83in Selenium
- Average rating
- 4.64 starsAmazon United States average 4.42 stars
- Average reviews
- 3,296per listing
- Listings tracked
- 8
04 · Newcomers
Brands here are established.
The brands on the shelf have sold for 102 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
- 102 months
Products
Top Selenomethionine 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

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

Pure Encapsulations Selenium - 200 mcg - for Healthy Cellular Function Immune System & Antioxidant Defenses* - Mineral Supplement - Vegan & Gluten Free - 60 Capsules
- Price
- $14.22
- Rating
- 4.6/5
- Reviews
- 5,733
- Age
- 16y ago

Pure Encapsulations Selenium (Citrate) - for Immune System Support & Cellular Health - Antioxidant Supplement - Supports Blood Flow* - Gluten Free & Vegan - 180 Capsules
- Price
- $28.65
- Rating
- 4.8/5
- Reviews
- 963
- Age
- 18y ago

Nutricost Selenium 200mcg 240 Vegetarian Capsules L-Selenomethionine
- Price
- $13.79
- Rating
- 4.7/5
- Reviews
- 3,684
- Age
- 8y ago
Trending
estimated 90-day click momentum
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

Pure Encapsulations Selenium (Citrate) - for Immune System Support & Cellular Health - Antioxidant Supplement - Supports Blood Flow* - Gluten Free & Vegan - 180 Capsules
- Price
- $28.65
- Rating
- 4.8/5
- Reviews
- 963
- Age
- 18y ago

Biotics Research Selenomethionine High Potency Selenium Thyroid Gland Function DNA Production Cognitive Health Potent Antioxidant. 90 Capsules
- Price
- $20.00
- Rating
- 4.5/5
- Reviews
- 103
- Age
- 8y ago

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

Pure Encapsulations Selenium - 200 mcg - for Healthy Cellular Function Immune System & Antioxidant Defenses* - Mineral Supplement - Vegan & Gluten Free - 60 Capsules
- Price
- $14.22
- Rating
- 4.6/5
- Reviews
- 5,733
- Age
- 16y ago
Newest
by launch date
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

Biotics Research Selenomethionine High Potency Selenium Thyroid Gland Function DNA Production Cognitive Health Potent Antioxidant. 90 Capsules
- Price
- $20.00
- Rating
- 4.5/5
- Reviews
- 103
- Age
- 8y ago

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

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

Pure Encapsulations Selenium - 200 mcg - for Healthy Cellular Function Immune System & Antioxidant Defenses* - Mineral Supplement - Vegan & Gluten Free - 60 Capsules
- Price
- $14.22
- Rating
- 4.6/5
- Reviews
- 5,733
- Age
- 16y ago
Competition
Competition: brands, sellers & click share
The top 5 products take an estimated 91% of clicks. A locked shelf that new listings rarely crack.
Brands
6 rising
Sellers
17
Est. top-5 brand share
97%
Top 20: 100%
Est. top-5 click share
91%
Top 20: 100%
Open market
0%
- THORNE56%
- Pure Encapsulations31%
- Nutricost4%
- NOW Foods3%
- BIOTICS RESEARCH3%
- Triquetra Health3%
Demand
Selenomethionine search demand
Weekly searches over the year, seasonality beneath. Pick a range.
Peak months: Jan · busiest ÷ quietest = 1.9×
Search terms
Top Selenomethionine search terms shoppers use
The exact words shoppers type, with estimated yearly volume, growth, and conversion.
- selenomethionine29K/yr
- thorne selenium23K/yr
- pure selenium9K/yr
- thorne selenium 200mcg capsules9K/yr
- pure encapsulations selenium8K/yr
- selenium thorne4K/yr
- selenium pure encapsulations4K/yr
- selenomethionine 200mcg organic1K/yr
Reviews and returns
What reviews say buyers love and hate about Selenomethionine
We read the reviews and the return reasons for every product selling here.
“had an odd odor”
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.
18 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 Selenomethionine 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









