---
title: "Iron and Vitamin D — $9K/mo Amazon US Product Research"
canonical_url: "https://flapen.com/research/us/health-household/iron-and-vitamin-d"
last_updated: "2026-08-12T11:47:06.147Z"
locale: en
meta:
description: "Amazon product research for iron and vitamin d: $9K/mo market, demand, competition, pricing, reviews & the verdict. Know if it's worth selling — Flapen."
"og:description": "Amazon product research for iron and vitamin d: $9K/mo market, demand, competition, pricing, reviews & the verdict. Know if it's worth selling — Flapen."
"og:title": "Iron and Vitamin D — $9K/mo Amazon US Product Research"
---
# **Iron and Vitamin D**
**Skip it**
Brand-locked demand (top 5 brands take 100% of clicks) — this niche doesn't clear our bar today.
Market size 25Growth 23Conversion 95Competition 7Returns 100Price range 22Avg price 52Brand share 0Review moat 20Quality gap 21
**Returns**
**Incredible****0.0%**
return rate — above 5% kills the launch gate
**Conversion**
**Incredible****12.2%**
search→purchase rate — share of searches ending in a sale
**Avg price**
**Good****$12.23**
avg 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–$17.89**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Quality gap**
**Bad****4.7★**
avg incumbent rating — lower means beatable quality
**Review moat**
**Bad****13,794.71**
avg incumbent reviews — the moat a new listing must climb
**Competition**
**Bad****92%**
top-5 click share — a locked-up shelf
**Brand share**
**Bad****100%**
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 ~~](https://flapen.com/research/methodology)
## **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.
2K1KSpike '26 seasonAprMayJunJulAugSepOctNovDecJanFebMarAprMayJunJul
No pronounced peak months · busiest ÷ quietest = 1.5×
[**Open Trend **](https://flapen.com/research/us/health-household/iron-and-vitamin-d/trend)
## **Top iron and vitamin d search terms shoppers use**
The exact queries shoppers type, with yearly volume, growth and conversion.
- **iron and vitamin d**12K/yr+8.7%2.5% conv. - **natures bounty iron**13K/yr-0.6%17.5% conv. - **natures bounty iron 65 mg**8K/yr-12.4%29.8% conv. - **vitamin d and iron supplement**8K/yr-11.4%3.4% conv. - **vitamin d and iron**6K/yr+7.6%2.9% conv. - **olly omega 3**6K/yr-22.3%6.6% conv. - **iron and vitamin d supplement**4K/yr+35.5%3.2% conv. - **olly womens multivitamin omega 3**5K/yr-16.4%12.2% conv. - **nature bounty iron**3K/yr-0.8%12.5% conv. - **iron natures bounty**4K/yr-31.9%21.3% conv. [**All search terms **](https://flapen.com/research/us/health-household/iron-and-vitamin-d/search-terms)
## **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.
0%15%$15K30%$31K45%$46K60%$61K101001K10K100K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 7 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**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**$4.84**4.7★35,936 rev](https://www.amazon.com/dp/B006QQRY2O) [2**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**$17.41**4.6★7,945 rev](https://www.amazon.com/dp/B08LQTJKHR) [3**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**$6.42**4.7★1,068 rev](https://www.amazon.com/dp/B0061GLELG) [4**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**$13.10**4.6★92 rev](https://www.amazon.com/dp/B0DTTKCHH2) [5**Natures Bounty Iron 65 mg Tablets 100 Tablets 100 Each 3-Pack**Nature's Bounty**$17.89**4.7★35,936 rev](https://www.amazon.com/dp/B00E4MIIYA)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**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**$13.10**92 rev6mo ago](https://www.amazon.com/dp/B0DTTKCHH2) [**Iron Supplement for Women - Iron 65mg (Ferrous Sulfate 325mg) - 60 Caps**NUTRAHARMONY**$17.76**2,124 rev2y ago](https://www.amazon.com/dp/B0D47FBQP6) [**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**$17.41**7,945 rev5y ago](https://www.amazon.com/dp/B08LQTJKHR) [**Natures Bounty Iron 65 mg Tablets 100 Tablets 100 Each 3-Pack**Nature's Bounty**$17.89**35,936 rev13y ago](https://www.amazon.com/dp/B00E4MIIYA) [**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**$6.42**1,068 rev14y ago](https://www.amazon.com/dp/B0061GLELG)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**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**$13.10**4.6★**▲ 163%**](https://www.amazon.com/dp/B0DTTKCHH2) [**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**$6.42**4.7★**▲ 87%**](https://www.amazon.com/dp/B0061GLELG) [**Iron Supplement for Women - Iron 65mg (Ferrous Sulfate 325mg) - 60 Caps**NUTRAHARMONY**$17.76**4.6★**— 3%**](https://www.amazon.com/dp/B0D47FBQP6) [**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**$4.84**4.7★**— 5%**](https://www.amazon.com/dp/B006QQRY2O) [**Natures Bounty Iron 65 mg Tablets 100 Tablets 100 Each 3-Pack**Nature's Bounty**$17.89**4.7★**— 8%**](https://www.amazon.com/dp/B00E4MIIYA)
**~~View all trending →~~**
## **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 **
**Iron**16%
*“Excellent Iron supplement”*
**Vitamin**15%
*“Easy choice for multi vitamin”*
**Quality-Overall**12%
*“It has been a reliable product for me”*
**Value For Money**7%
*“Good value for price”*
**Advertised Vs Actual Product**5%
*“Exactly as described”*
**Acid Regulator/Stomach Ache Relief**4%
*“They help settle my stomach”*
**Ease Of Chewing/Swallowing**4%
*“he says that it isnt too hard to swallow not too big”*
**Energy Level**4%
*“Give me Energy”*
**Efficiency**4%
*“easing into it is a good idea”*
**Ease Of Use**3%
*“Convenient to use”*
### **What buyers complain about **
**Iron**13%
*“I had very low iron levels”*
**Taste-Overall**10%
*“Strong metallic taste”*
**Acid Regulator/Stomach Ache Relief**8%
*“Hurt my stomach horribly”*
**Side Effects**5%
*“Side Effects”*
**Vitamin**5%
*“I am also severely lacking Vitamin D so it is hard to tell which is helping”*
**Smell**3%
*“bad smell”*
**Advertised Vs Actual Product**3%
*“False advertisement”*
**Dosage**3%
*“65mg in a serving is a MASSIVE dose”*
**Value For Money**2%
*“Waste of money”*
**Ease Of Use**2%
*“Impossible to open”*
### **Top return reasons **
**Size-Overall**25%
**Ingredients-Overall**17%
**Advertised Vs Actual Product**17%
**Accuracy-Overall**8%
**Product Condition**8%
**Side Effects**8%
**Acid Regulator/Stomach Ache Relief**8%
**Iron**4%
**Smell**4%
## **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.
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