Selenium 100 Mcg
FailDemand is soft, at -10.1% this quarter, so Selenium 100 Mcg is a Fail.
- Flapen Score
- 49 / 100Ranks 7,059 of 14,768 Health & Household niches · on the category median49
- Market size
- $177K/yr70K searches / yr
- 90-day growth
- -10.1%search demand this quarter
- Competition
- 59%top-5 click share · 12 brands · 551 sellers
Flapen Score
Selenium 100 Mcg against its category
The dotted line is the Health & Household average. Past it, Selenium 100 Mcg is stronger. Inside it, weaker.
Market
The Selenium 100 Mcg market on Amazon at a glance
Shoppers on Amazon United States searched for Selenium 100 Mcg 70K times last year and spent an estimated $177K. The top 5 brands take 85% of clicks. Demand peaks in Sep–Oct–Nov–Dec. Flapen scores it 49 out of 100, a Fail.
01 · Demand
An estimated 15.6% of those searches ended in a purchase.
Shoppers searched for this 70K times in the last 12 months. That counts every search on Amazon United States for this niche's terms. An estimated 15.6% of those searches ended in a purchase. Searches in the last 90 days moved -10.1% against the 90 days before. Searches, conversion and average price together put the market at an estimated $177K a year.
- Searches, last 12 months
- 70K
- Growth, 90 days vs prior 90
- -10.1%
- Conversion, latest week
- 15.6%
- Market size, estimated
- $177Ka year
- Peak month
- October13.0× the quietest month
- Top search term
- selenium 100 mcg38K searches a year
02 · Price
A sale here is worth $16.17.
Listings sell for $16.17 on average, from $4.99 to $39.34. Amazon reports units sold in ranges. This niche sold 10K to 13K a year. The average listing sells 500 to 750 of them. At $16.17 that is $8K to $12K a year per listing.
- Average price
- $16.17inside the $15 to $100 sweet spot
- Price range
- $4.99–$39.34
- Amazon United States median price
- $24.38across 115,062 niches
- Units sold a year
- 10K–13K
- Units per listing a year
- 500–750
- Revenue per listing a year
- $8K–$12K
- Returns
- 0.0%of orders · Amazon United States median 2.1%
03 · Entry bar
The bar here is reviews.
67% 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 #124 within Selenium. It carries 2,694 reviews at 4.63 stars, so a new listing needs social proof before a better product.
- Sponsored listings
- 67%
- Prime listings
- 100%
- Out of stock, average day
- 0.0%
- Average rank
- #124in Selenium
- Average rating
- 4.63 starsAmazon United States average 4.42 stars
- Average reviews
- 2,694per listing
- Listings tracked
- 21
04 · Newcomers
Brands here are established.
The brands on the shelf have sold for 120 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
- 120 months
Products
Top Selenium 100 Mcg 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
NOW Foods Supplements Selenium (L-Selenomethionine) 100 mcg Essential Mineral* 250 Tablets
- Price
- $9.27
- Rating
- 4.7/5
- Reviews
- 4,266
- Age
- 22y ago

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

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

Nutricost Selenium Supplement 100mcg 240 Capsules Vegetarian Gluten-Free
- Price
- $12.73
- Rating
- 4.6/5
- Reviews
- 284
- Age
- 4y ago

Amazing Formulas Selenium Supplement | 100 Mcg Per Serving | 250 Tablets | Non-GMO | Gluten Free | Made in USA
- Price
- $9.80
- Rating
- 4.6/5
- Reviews
- 110
- Age
- 3y ago
Trending
estimated 90-day click momentum
Designs for Health Thyrommune - Thyroid Support Supplement with Selenium (Selenomethionine) + Myo-Inositol - Vegan & Gluten-Free (60 Capsules)
- Price
- $27.63
- Rating
- 4.5/5
- Reviews
- 161
- Age
- 4y ago

NOW Foods Supplements Selenium (L-Selenomethionine) 200 mcg Essential Mineral* 90 Veg Capsules
- Price
- $6.50
- Rating
- 4.6/5
- Reviews
- 679
- Age
- 21y ago

Amazing Formulas Selenium Supplement | 100 Mcg Per Serving | 250 Tablets | Non-GMO | Gluten Free | Made in USA
- Price
- $9.80
- Rating
- 4.6/5
- Reviews
- 110
- Age
- 3y 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

Nutricost Selenium Supplement 100mcg 240 Capsules Vegetarian Gluten-Free
- Price
- $12.73
- Rating
- 4.6/5
- Reviews
- 284
- Age
- 4y ago
Newest
by launch date
Amazing Formulas Selenium Supplement | 100 Mcg Per Serving | 250 Tablets | Non-GMO | Gluten Free | Made in USA
- Price
- $9.80
- Rating
- 4.6/5
- Reviews
- 110
- Age
- 3y ago

Nutricost Selenium Supplement 100mcg 240 Capsules Vegetarian Gluten-Free
- Price
- $12.73
- Rating
- 4.6/5
- Reviews
- 284
- Age
- 4y ago

Designs for Health Thyrommune - Thyroid Support Supplement with Selenium (Selenomethionine) + Myo-Inositol - Vegan & Gluten-Free (60 Capsules)
- Price
- $27.63
- Rating
- 4.5/5
- Reviews
- 161
- Age
- 4y ago

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

Now Selenium 200mcg Capsules 300 Count (Pack of 2) - L Selenomethionine Mineral Supplement for Women & Men - Veg Caps Non-GMO Vegan Friendly Yeast-Free
- Price
- $39.34
- Rating
- 4.7/5
- Reviews
- 106
- Age
- 6y ago
Competition
Competition: brands, sellers & click share
The top 5 products take an estimated 59% of clicks. Leaders hold, but buyers still shop past them.
Brands
12 rising
Sellers
551
Est. top-5 brand share
85%
Top 20: 100%
Est. top-5 click share
59%
Top 20: 99%
Open market
10%
- NOW Foods56%
- Nutricost10%
- Amazing Nutrition7%
- Pure Encapsulations6%
- THORNE5%
- SOLARAY5%
- Open — no brand owns it (6 brands, 10%)
Demand
Selenium 100 Mcg search demand
Weekly searches over the year, seasonality beneath. Pick a range.
Peak months: Sep, Oct, Nov, Dec · busiest ÷ quietest = 13.0×
Search terms
Top Selenium 100 Mcg search terms shoppers use
The exact words shoppers type, with estimated yearly volume, growth, and conversion.
- selenium 100 mcg38K/yr
- selenium 100mcg6K/yr
- now selenium 200 mcg6K/yr
- now selenium8K/yr
- selenium now4K/yr
- selenio 100mg3K/yr
- selenium 1003K/yr
- now foods selenium 200 mcg2K/yr
Reviews and returns
What reviews say buyers love and hate about Selenium 100 Mcg
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 100 Mcg 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









