Iodine Liquid with Kelp
Skip itA concentrated shelf (top 5 take 86% of clicks) — this niche doesn't clear our bar today.
Returns
Incredible0.0%return rate — above 5% kills the launch gate
Conversion
Incredible16.8%search→purchase rate — share of searches ending in a sale
Avg price
Great$16.01avg listing price — sweet spot $15–$100
Market size
Good$797K$797K/yr · 296K searches
Price range
Good$5.62–$29.85cheapest to priciest tracked listing — scored on the share inside $15–$100
Review moat
Okay3,393.3avg incumbent reviews — the moat a new listing must climb
Quality gap
Bad4.7★avg incumbent rating — lower means beatable quality
Growth
Bad-8.1%90-day search growth — must beat 0% to launch
Brand share
Bad92%top-5 brand share — brand-locked demand
Competition
Bad86%top-5 click share — a locked-up shelf
Is iodine liquid with kelp profitable on Amazon?
According to Flapen's Amazon United States niche tracking, iodine liquid with kelp is a $797K/yr Amazon United States market (296K searches/yr). The top 5 brands hold 92% of demand. Demand peaks in Dec. Verdict: Skip it — 48/100.
Data updated Jul 28, 2026 · scored weekly · How we score niches
iodine liquid with kelp market size & sales
Units sold, revenue, conversion and listing quality across the tracked shelf.- Units sold / yr
- 3K–4K
- avg 250–500/product
- Revenue / yr
- $48K–$64K
- units × avg price
- Conversion rate
- 16.8%
- Avg BSR
- #350
- Page quality
- 0%
- Prime
- 100%
- Sponsored
- 80%
- Out of stock
- 0.0%
- Avg brand age
- 103 months
- Avg seller age
- 167 days
Competition: brands, sellers & click share
The top 5 products capture 86% of clicks — a locked-up shelf that new listings rarely crack.Brands
8 flat
Sellers
508
Top-5 brand share
92%
Top 20: 100%
Top-5 click share
86%
Top 20: 100%
Open market
5%
- Life Extension66%
- Pure Encapsulations11%
- NOW Foods8%
- MARYRUTH'S4%
- Zazzee3%
- Triquetra Health3%
- Open — no brand owns it (2 brands, 5%)
iodine liquid with kelp demand & seasonality
Weekly Amazon search volume, last 86 weeks — -8.1% search growth over the last 90 days.Peak months: Dec · busiest ÷ quietest = 16.9×
Top iodine liquid with kelp search terms shoppers use
The exact queries shoppers type, with yearly volume, growth and conversion.- sea iodine8K/yr
- iodine 150 mcg4K/yr
- iodine rich foods3K/yr
- iodine capsules4K/yr
- sea iodine life extension3K/yr
- kelp iodine liquid34K/yr
- iodine liquid with kelp242K/yr
Top iodine liquid with kelp products & what they sell for
Every tracked product — its share of the shelf, its review moat, and what it sells for.Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.
All 10 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
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
Life Extension$5.624.6★8,248 rev
Life Extension Sea-Iodine Capsules 1000 mcg 150 Veg Caps Natural Iodine Supplement from Kelp and Bladderwack
Life Extension$16.384.6★2,248 rev
Life Extension Sea Iodine 1000 mcg 150 Veg Caps (Pack of 2) - Natural Iodine Supplement from Kelp and Bladderwack
Life Extension$29.854.8★413 rev
Pure Encapsulations Iodine - Supplement to Support The Thyroid & Help Maintain Healthy Cellular Metabolism* - with Premium Potassium Iodide - 120 Capsules
Pure Encapsulations$20.014.7★2,790 rev
NOW Supplements Kelp 150 mcg of Natural Iodine Easier to Swallow Tablet Super Green 200 Tablets
NOW Foods$7.524.6★1,482 rev
Newest
by launch date
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)
Triquetra Health$17.791,900 rev
Nutricost Iodine Natural Iodine from Organic Sea Kelp 325mcg 120 Caps
Nutricost$14.82294 rev
Zazzee USDA Organic Kelp Iodine 30:1 Extract 300 mcg per Capsule Vegan
Zazzee$19.4052 rev
Carlyle Sea Kelp Iodine Supplement | 225mcg | 300 Tablets
Carlyle$10.292,128 rev
Life Extension Sea Iodine 1000 mcg 150 Veg Caps (Pack of 2) - Natural Iodine Supplement from Kelp and Bladderwack
Life Extension$29.85413 rev
Trending
90-day click momentumZazzee USDA Organic Kelp Iodine 30:1 Extract 300 mcg per Capsule Vegan
Zazzee$19.404.6★
MaryRuth Organics Iodine Liquid Drops | Potassium Iodide | 1 Year Supply | 450 Servings | Thyroid Health | USDA Organic| Vegan | Non-GMO | Gluten Free | 1 Fl Oz
MARYRUTH'S$18.374.6★
Pure Encapsulations Iodine - Supplement to Support The Thyroid & Help Maintain Healthy Cellular Metabolism* - with Premium Potassium Iodide - 120 Capsules
Pure Encapsulations$20.014.7★
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
Life Extension$5.624.6★
Nutricost Iodine Natural Iodine from Organic Sea Kelp 325mcg 120 Caps
Nutricost$14.824.7★
What reviews say buyers love and hate about iodine liquid with kelp
What buyers praise and complain about, mined from review topics.What buyers love
“It is a quality capsule”
“Great Value”
“Wonderful and effective”
“It is a good supplement for me”
“As advertised”
“Bonus: sea kelp helps with managing estrogen too so it is a must have for women who are dealing with hormone fluctuations”
“Easy to swallow”
“Good quality clean organic”
“Surprisingly delicious”
“Overall, they seem to be reasonably well-made supplement pills”
What buyers complain about
“our bodies are missing this vital nutrient”
“Only thing to be aware of is the dosage is on the higher side for some people”
“the taste is hard to mask”
“They are small”
“Doesn't seem to do much for me”
“But this formulation contains SUGAR as glycerin”
“CONTAINS GLYCERIN: Nooooooo”
“Didnt see a difference”
“have backed off for a while cause of dizziness”
“After months of suffering they were gone within 3 days of stopping”
Top return reasons
Common iodine liquid with kelp questions
- Is iodine liquid with kelp profitable to sell on Amazon United States?
- The niche generates $797K/yr across 10 tracked products. 90-day search growth is -8.1%. Flapen's verdict: Skip it (48/100).
- How competitive is the iodine liquid with kelp niche?
- 8 brands and 508 sellers compete. The top 5 products take 86% of clicks and top 5 brands hold 92% of demand.
- What do buyers complain about in iodine liquid with kelp?
- Top complaints mined from reviews: Nutritional Content, Dosage, Taste-Overall. The return rate is 0.0%.
- When does demand for iodine liquid with kelp peak?
- Demand peaks in Dec; the busiest month runs 16.9× the quietest.
- What does it cost to enter the iodine liquid with kelp niche?
- Listings span $5.62–$29.85; the average listing price is $16.01 (sweet spot $15–$100). The average incumbent carries 3,393 reviews — the moat a new listing must climb.