Sea Kelp
FailThe top 5 products take 89% of clicks, so Sea Kelp is a Fail.
- Flapen Score
- 41 / 100Ranks 11,806 of 14,768 Health & Household niches · −8 vs the category median of 4941
- Market size
- $78K/yr37K searches / yr
- 90-day growth
- -15.6%search demand this quarter
- Competition
- 89%top-5 click share · 8 brands · 21 sellers
Flapen Score
Sea Kelp against its category
The dotted line is the Health & Household average. Past it, Sea Kelp is stronger. Inside it, weaker.
Market
The Sea Kelp market on Amazon at a glance
Shoppers on Amazon United States searched for Sea Kelp 37K times last year and spent an estimated $78K. The top 5 brands take 89% of clicks. Flapen scores it 41 out of 100, a Fail.
01 · Demand
An estimated 13.9% of those searches ended in a purchase.
Shoppers searched for this 37K times in the last 12 months. That counts every search on Amazon United States for this niche's terms. An estimated 13.9% of those searches ended in a purchase. Searches in the last 90 days moved -15.6% against the 90 days before. Searches, conversion and average price together put the market at an estimated $78K a year.
- Searches, last 12 months
- 37K
- Growth, 90 days vs prior 90
- -15.6%
- Conversion, latest week
- 13.9%
- Market size, estimated
- $78Ka year
- Peak month
- May1.4× the quietest month
- Top search term
- sea kelp iodine supplement16K searches a year
02 · Price
A sale here is worth $15.21.
Listings sell for $15.21 on average, from $5.62 to $33.84. Amazon reports units sold in ranges. This niche sold 4K to 5K a year. The average listing sells 500 to 750 of them. At $15.21 that is $8K to $11K a year per listing.
- Average price
- $15.21inside the $15 to $100 sweet spot
- Price range
- $5.62–$33.84
- Amazon United States median price
- $24.38across 115,062 niches
- Units sold a year
- 4K–5K
- Units per listing a year
- 500–750
- Revenue per listing a year
- $8K–$11K
- Returns
- 0.0%of orders · Amazon United States median 2.1%
03 · Entry bar
The bar here is reviews.
75% 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 #611 within Iodine. It carries 2,281 reviews at 4.66 stars, so a new listing needs social proof before a better product.
- Sponsored listings
- 75%
- Prime listings
- 100%
- Out of stock, average day
- 0.0%
- Average rank
- #611in Iodine
- Average rating
- 4.66 starsAmazon United States average 4.42 stars
- Average reviews
- 2,281per listing
- Listings tracked
- 8
04 · Newcomers
Brands here are established.
The brands on the shelf have sold for 86 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
- 86 months
Products
Top Sea Kelp 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
Dr. Berg Sea Kelp Enhanced Iodine - 200 mcg of Premium Iodine - Seaweed Blend Includes Klamath Blue-Green Algae & Sea Kelp - 90 Capsules
- Price
- $33.84
- Rating
- 4.8/5
- Reviews
- 612
- Age
- 2y ago

Carlyle Sea Kelp Iodine Supplement | 225mcg | 300 Tablets
- Price
- $10.29
- Rating
- 4.6/5
- Reviews
- 2,128
- Age
- 4y ago

Zazzee USDA Organic Kelp Iodine 30:1 Extract 300 mcg per Capsule Vegan
- Price
- $19.40
- Rating
- 4.6/5
- Reviews
- 52
- Age
- 4y ago

Organic Iodine Supplement from Sea Vegetable Complex Whole Food & Raw Form - Iodine Plus Trace Mineral Complex Contains Purest Icelandic Sea Kelp Irish Moss & Bladderwrack (250 mcg)
- Price
- $17.79
- Rating
- 4.7/5
- Reviews
- 1,900
- Age
- 3y ago

Life Extension Sea-Iodine kelp and bladderwrack-derived Iodine Supports Healthy Levels of This Essential Nutrient for Thyroid Health and Beyond Non-GMO Gluten-Free Vegetarian 60 Capsules
- Price
- $5.62
- Rating
- 4.6/5
- Reviews
- 8,248
- Age
- 17y ago
Trending
estimated 90-day click momentum
Zazzee USDA Organic Kelp Iodine 30:1 Extract 300 mcg per Capsule Vegan
- Price
- $19.40
- Rating
- 4.6/5
- Reviews
- 52
- Age
- 4y ago

Nutricost Kelp Tablets 325mcg of Iodine 240 Tablets Gluten-Free
- Price
- $11.83
- Rating
- 4.7/5
- Reviews
- 743
- Age
- 5y ago

Life Extension Sea-Iodine kelp and bladderwrack-derived Iodine Supports Healthy Levels of This Essential Nutrient for Thyroid Health and Beyond Non-GMO Gluten-Free Vegetarian 60 Capsules
- Price
- $5.62
- Rating
- 4.6/5
- Reviews
- 8,248
- Age
- 17y ago

CNP | Icelandic Sea Kelp Capsules 600mg - Iodine Thyroid Support Pills
- Price
- $11.95
- Rating
- 4.7/5
- Reviews
- 536
- Age
- 9y ago

Dr. Berg Sea Kelp Enhanced Iodine - 200 mcg of Premium Iodine - Seaweed Blend Includes Klamath Blue-Green Algae & Sea Kelp - 90 Capsules
- Price
- $33.84
- Rating
- 4.8/5
- Reviews
- 612
- Age
- 2y ago
Newest
by launch date
Dr. Berg Sea Kelp Enhanced Iodine - 200 mcg of Premium Iodine - Seaweed Blend Includes Klamath Blue-Green Algae & Sea Kelp - 90 Capsules
- Price
- $33.84
- Rating
- 4.8/5
- Reviews
- 612
- Age
- 2y ago

Organic Iodine Supplement from Sea Vegetable Complex Whole Food & Raw Form - Iodine Plus Trace Mineral Complex Contains Purest Icelandic Sea Kelp Irish Moss & Bladderwrack (250 mcg)
- Price
- $17.79
- Rating
- 4.7/5
- Reviews
- 1,900
- Age
- 3y ago

Zazzee USDA Organic Kelp Iodine 30:1 Extract 300 mcg per Capsule Vegan
- Price
- $19.40
- Rating
- 4.6/5
- Reviews
- 52
- Age
- 4y ago

Carlyle Sea Kelp Iodine Supplement | 225mcg | 300 Tablets
- Price
- $10.29
- Rating
- 4.6/5
- Reviews
- 2,128
- Age
- 4y ago

Nutricost Kelp Tablets 325mcg of Iodine 240 Tablets Gluten-Free
- Price
- $11.83
- Rating
- 4.7/5
- Reviews
- 743
- Age
- 5y ago
Competition
Competition: brands, sellers & click share
The top 5 products take an estimated 89% of clicks. A locked shelf that new listings rarely crack.
Brands
8 flat
Sellers
21
Est. top-5 brand share
89%
Top 20: 100%
Est. top-5 click share
89%
Top 20: 100%
Open market
6%
- Dr. Berg Nutritionals52%
- Carlyle17%
- Zazzee8%
- Triquetra Health6%
- Life Extension6%
- NOW Foods5%
- Open — no brand owns it (2 brands, 6%)
Demand
Sea Kelp search demand
Weekly searches over the year, seasonality beneath. Pick a range.
No pronounced peak months · busiest ÷ quietest = 1.4×
Search terms
Top Sea Kelp search terms shoppers use
The exact words shoppers type, with estimated yearly volume, growth, and conversion.
- sea kelp iodine supplement16K/yr
- seaweed supplement9K/yr
- dr berg iodine4K/yr
- dr berg sea kelp3K/yr
- sea kelp iodine3K/yr
- dr berg sea kelp enhanced iodine2K/yr
Reviews and returns
What reviews say buyers love and hate about Sea Kelp
We read the reviews and the return reasons for every product selling here.
“BECAUSE I STARTED FEELING MOODY, DEPRESSED AND EMOTIONAL, CRYING FOR NO GOOD REASON”
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 Sea Kelp 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









