Iron and Vitamin D
Skip itBrand-locked demand (top 5 brands take 100% of clicks) — this niche doesn't clear our bar today.
Returns
Incredible0.0%return rate — above 5% kills the launch gate
Conversion
Incredible12.2%search→purchase rate — share of searches ending in a sale
Avg price
Good$12.23avg listing price — sweet spot $15–$100
Market size
Okay$102K$102K/yr · 69K searches
Growth
Bad-4.4%90-day search growth — must beat 0% to launch
Price range
Bad$4.84–$17.89cheapest to priciest tracked listing — scored on the share inside $15–$100
Quality gap
Bad4.7★avg incumbent rating — lower means beatable quality
Review moat
Bad13,794.71avg incumbent reviews — the moat a new listing must climb
Competition
Bad92%top-5 click share — a locked-up shelf
Brand share
Bad100%top-5 brand share — brand-locked demand
Is iron and vitamin d profitable on Amazon?
According to Flapen's Amazon United States niche tracking, iron and vitamin d is a $102K/yr Amazon United States market (69K searches/yr). The top 5 brands hold 100% of demand. Verdict: Skip it — 35/100.
Data updated Jul 28, 2026 · scored weekly · How we score niches
iron and vitamin d market size & sales
Units sold, revenue, conversion and listing quality across the tracked shelf.- Units sold / yr
- 10K–13K
- avg 1,000–1,250/product
- Revenue / yr
- $122K–$153K
- units × avg price
- Conversion rate
- 12.2%
- Avg BSR
- #95
- Page quality
- 0%
- Prime
- 100%
- Sponsored
- 86%
- Out of stock
- 0.0%
- Avg brand age
- 77 months
- Avg seller age
- 151 days
Competition: brands, sellers & click share
The top 5 products capture 92% of clicks — a locked-up shelf that new listings rarely crack.Brands
5 flat
Sellers
85
Top-5 brand share
100%
Top 20: 100%
Top-5 click share
92%
Top 20: 100%
Open market
0%
- Nature's Bounty67%
- OLLY18%
- Doctor's Recipes6%
- Nature Made5%
- NUTRAHARMONY4%
iron and vitamin d demand & seasonality
Weekly Amazon search volume, last 69 weeks — -4.4% search growth over the last 90 days.No pronounced peak months · busiest ÷ quietest = 1.5×
Top iron and vitamin d search terms shoppers use
The exact queries shoppers type, with yearly volume, growth and conversion.- iron and vitamin d12K/yr
- natures bounty iron13K/yr
- natures bounty iron 65 mg8K/yr
- vitamin d and iron supplement8K/yr
- vitamin d and iron6K/yr
- olly omega 36K/yr
- iron and vitamin d supplement4K/yr
- olly womens multivitamin omega 35K/yr
- nature bounty iron3K/yr
- iron natures bounty4K/yr
Top iron and vitamin d 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 7 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Natures Bounty Iron 65mg 325 mg Ferrous Sulfate Cellular Energy Support Promotes Normal Red Blood Cell Production 1 Serving Per Day Gluten Free 100 Vegetarian Tablets
Nature's Bounty$4.844.7★35,936 rev
OLLY Ultra Strength Womens Multi Softgels Overall Health and Immune Support Omega-3s Iron Vitamins A D C E B12 Daily Multivitamin 30 Day Supply - 60 Count
OLLY$17.414.6★7,945 rev
Natures Bounty Gentle Iron 28 mg Capsules with Vitamin C Folic Acid Vitamin B-12 Iron Supplement Non-GMO Gluten-Free 90 Count
Nature's Bounty$6.424.7★1,068 rev
Doctors Recipes Iron Supplement for Women & Men Iron 65 mg with Vitamin C D3 B6 B12 Folate Beet Root Pumpkin Seeds for Energy & Red Blood Cell Support 90 Tablets
Doctor's Recipes$13.104.6★92 rev
Natures Bounty Iron 65 mg Tablets 100 Tablets 100 Each 3-Pack
Nature's Bounty$17.894.7★35,936 rev
Newest
by launch dateDoctors Recipes Iron Supplement for Women & Men Iron 65 mg with Vitamin C D3 B6 B12 Folate Beet Root Pumpkin Seeds for Energy & Red Blood Cell Support 90 Tablets
Doctor's Recipes$13.1092 rev
Iron Supplement for Women - Iron 65mg (Ferrous Sulfate 325mg) - 60 Caps
NUTRAHARMONY$17.762,124 rev
OLLY Ultra Strength Womens Multi Softgels Overall Health and Immune Support Omega-3s Iron Vitamins A D C E B12 Daily Multivitamin 30 Day Supply - 60 Count
OLLY$17.417,945 rev
Natures Bounty Iron 65 mg Tablets 100 Tablets 100 Each 3-Pack
Nature's Bounty$17.8935,936 rev
Natures Bounty Gentle Iron 28 mg Capsules with Vitamin C Folic Acid Vitamin B-12 Iron Supplement Non-GMO Gluten-Free 90 Count
Nature's Bounty$6.421,068 rev
Trending
90-day click momentumDoctors Recipes Iron Supplement for Women & Men Iron 65 mg with Vitamin C D3 B6 B12 Folate Beet Root Pumpkin Seeds for Energy & Red Blood Cell Support 90 Tablets
Doctor's Recipes$13.104.6★
Natures Bounty Gentle Iron 28 mg Capsules with Vitamin C Folic Acid Vitamin B-12 Iron Supplement Non-GMO Gluten-Free 90 Count
Nature's Bounty$6.424.7★
Iron Supplement for Women - Iron 65mg (Ferrous Sulfate 325mg) - 60 Caps
NUTRAHARMONY$17.764.6★
Natures Bounty Iron 65mg 325 mg Ferrous Sulfate Cellular Energy Support Promotes Normal Red Blood Cell Production 1 Serving Per Day Gluten Free 100 Vegetarian Tablets
Nature's Bounty$4.844.7★
Natures Bounty Iron 65 mg Tablets 100 Tablets 100 Each 3-Pack
Nature's Bounty$17.894.7★
What reviews say buyers love and hate about iron and vitamin d
What buyers praise and complain about, mined from review topics.What buyers love
“Excellent Iron supplement”
“Easy choice for multi vitamin”
“It has been a reliable product for me”
“Good value for price”
“Exactly as described”
“They help settle my stomach”
“he says that it isnt too hard to swallow not too big”
“Give me Energy”
“easing into it is a good idea”
“Convenient to use”
What buyers complain about
“I had very low iron levels”
“Strong metallic taste”
“Hurt my stomach horribly”
“Side Effects”
“I am also severely lacking Vitamin D so it is hard to tell which is helping”
“bad smell”
“False advertisement”
“65mg in a serving is a MASSIVE dose”
“Waste of money”
“Impossible to open”
Top return reasons
Common iron and vitamin d questions
- Is iron and vitamin d profitable to sell on Amazon United States?
- The niche generates $102K/yr across 7 tracked products. 1 of 1 products launched in the last 360 days are still selling. 90-day search growth is -4.4%. Flapen's verdict: Skip it (35/100).
- How competitive is the iron and vitamin d niche?
- 5 brands and 85 sellers compete. The top 5 products take 92% of clicks and top 5 brands hold 100% of demand.
- What do buyers complain about in iron and vitamin d?
- Top complaints mined from reviews: Iron, Taste-Overall, Acid Regulator/Stomach Ache Relief. The return rate is 0.0%.
- When does demand for iron and vitamin d peak?
- Demand is steady year-round — the busiest month runs 1.5× the quietest.
- What does it cost to enter the iron and vitamin d niche?
- Listings span $4.84–$17.89; the average listing price is $12.23 (sweet spot $15–$100). The average incumbent carries 13,795 reviews — the moat a new listing must climb.