---
title: "Ferrous Sulfate 325mg — $1.3M/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/health-household/ferrous-sulfate-325mg"
last_updated: "2026-08-09T15:04:27.325Z"
locale: en
meta:
description: "Niche score 49/100 · $1.3M/yr market · 799K searches/yr · $12.48 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 49/100 · $1.3M/yr market · 799K searches/yr · $12.48 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Ferrous Sulfate 325mg — $1.3M/yr Amazon US Niche (2026) - Flapen"
---
# **ferrous sulfate 325mg**
**Skip it**
A concentrated shelf (top 5 take 88% of clicks) — this niche doesn't clear our bar today.
Market size 82Growth 36Conversion 95Competition 10Returns 100Price range 51Avg price 54Brand share 23Review moat 20Quality gap 21
**Returns**
**Incredible****0.0%**
return rate — above 5% kills the launch gate
**Conversion**
**Incredible****12.7%**
search→purchase rate — share of searches ending in a sale
**Market size**
**Great****$1.3M**
$1.3M/yr · 799K searches
**Avg price**
**Good****$12.48**
avg listing price — sweet spot $15–$100
**Price range**
**Good****$4.84–$25.51**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Growth**
**Okay****+8.5%**
90-day search growth — must beat 0% to launch
**Brand share**
**Bad****91%**
top-5 brand share — brand-locked demand
**Quality gap**
**Bad****4.7★**
avg incumbent rating — lower means beatable quality
**Review moat**
**Bad****12,747.11**
avg incumbent reviews — the moat a new listing must climb
**Competition**
**Bad****88%**
top-5 click share — a locked-up shelf
According to Flapen's Amazon United States niche tracking, ferrous sulfate 325mg is a $1.3M/yr Amazon United States market (799K searches/yr). The top 5 brands hold 91% of demand. Demand peaks in Aug–Sep. Verdict: Skip it — 49/100.
Data updated Jul 28, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **ferrous sulfate 325mg market data**
- **Units sold / yr**
- **100K–125K**
- avg 15,000–20,000/product
- **Revenue / yr**
- **$1.2M–$1.6M**
- units × avg price
- **Conversion rate**
- **12.7%**
- **Avg BSR**
- **#106**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **78%**
- **Out of stock**
- **0.0%**
- **Avg brand age**
- **82 months**
- **Avg seller age**
- **157 days**
## **Competition & brand share**
The top 5 products capture 88% of clicks — a locked-up shelf that new listings rarely crack.
**Brands**
**8 **▲rising
**Sellers**
**131**
**Top-5 brand share**
**91%**
Top 20: 100%
**Top-5 click share**
**88%**
Top 20: 100%
**Open market**
**6%**
- P Puregen Labs46% - Nature Made19% - Nature's Bounty12% - Vitamatic10% - THORNE4% - NUTRAHARMONY4% - Open — no brand owns it (2 brands, 6%)
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — +8.5% search growth over the last 90 days.
100K60K seasonSepDecMarJunAugNovMarMay
Peak months: Aug, Sep · busiest ÷ quietest = 5.0×
[**Open Trend **](https://flapen.com/research/us/health-household/ferrous-sulfate-325mg/trend)
## **Top ferrous sulfate 325mg search terms**
- **ferrous sulfate 325mg**355K/yr+11.8%15.3% conv. - **ferrous sulfate**143K/yr+4.9%6.9% conv. - **iron ferrous sulfate**40K/yr+12.1%2.4% conv. - **ferrous sulfate 325 mg**43K/yr+6.5%12.2% conv. - **325 mg iron supplement**31K/yr-1.8%9.9% conv. - **iron 325mg**26K/yr+7.0%10.7% conv. - **sulfato ferroso**23K/yr+16.4%3.0% conv. - **iron 325mg ferrous sulfate**16K/yr+10.3%12.6% conv. - **iron supplement 325mg**17K/yr+0.4%11.1% conv. - **ferosul iron tablets 325mg**13K/yr+1.1%3.3% conv. [**All search terms **](https://flapen.com/research/us/health-household/ferrous-sulfate-325mg/search-terms)
## **Top ferrous sulfate 325mg products on Amazon**
Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.
0%15%$189K30%$379K45%$568K60%$758K1001K10K100K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 9 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**Puregen Labs Ferrous Sulfate 325 mg (65 mg Elemental Iron) High Potency Iron Supplement | No Artificial Color Additives - 200 Tablets**P Puregen Labs**$10.02**4.7★3,990 rev](https://www.amazon.com/dp/B0CPKF8BC2) [2**Nature Made Iron 65 mg (325 mg Ferrous Sulfate) Tablets 180 Tablets**Nature Made**$6.13**4.7★55,047 rev](https://www.amazon.com/dp/B003PGJLRO) [3**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) [4**Vitamatic Ferrous Sulfate 325 mg with Vitamin C 100 mg (65 mg Elemental Iron) Coated Tablets High Potency Iron Supplement No Artificial Colors Made in USA**Vitamatic**$14.48**4.7★1,069 rev](https://www.amazon.com/dp/B0D2Q4BF6H) [5**THORNE - Advanced Iron Complex - Complete Blood Support Formula* - Elemental Iron Folate B and C Vitamins for Optimal Absorption - Chelated Iron Supplement - Gluten Dairy & Soy-Free - 60 Capsules**THORNE**$25.51**4.6★4,282 rev](https://www.amazon.com/dp/B0797PJQMT)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**The Vitamin Kitchen Ferrous Sulfate 325 mg (65 mg Elemental Iron) High Potency Iron Supplement - High Potency Iron Pills for Red Blood Cells - No Artificial Color Additives - 220 Tablets Made in USA**The Vitamin Kitchen**$7.24**269 rev1y ago](https://www.amazon.com/dp/B0F7GY98D9) [**Iron Supplement for Women - Iron 65mg (Ferrous Sulfate 325mg) - 60 Caps**NUTRAHARMONY**$17.76**2,124 rev2y ago](https://www.amazon.com/dp/B0D47FBQP6) [**Vitamatic Ferrous Sulfate 325 mg with Vitamin C 100 mg (65 mg Elemental Iron) Coated Tablets High Potency Iron Supplement No Artificial Colors Made in USA**Vitamatic**$14.48**1,069 rev2y ago](https://www.amazon.com/dp/B0D2Q4BF6H) [**Puregen Labs Ferrous Sulfate 325 mg (65 mg Elemental Iron) High Potency Iron Supplement | No Artificial Color Additives - 200 Tablets**P Puregen Labs**$10.02**3,990 rev2y ago](https://www.amazon.com/dp/B0CPKF8BC2) [**Nature Made Iron 65 mg (from Ferrous Sulfate) Tablets for Red Blood Cell Formation (365 ct.).**Nature Made**$15.93**2,789 rev2y ago](https://www.amazon.com/dp/B0CLP13YQ6)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Vitamatic Ferrous Sulfate 325 mg with Vitamin C 100 mg (65 mg Elemental Iron) Coated Tablets High Potency Iron Supplement No Artificial Colors Made in USA**Vitamatic**$14.48**4.7★**▲ 35%**](https://www.amazon.com/dp/B0D2Q4BF6H) [**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★**▲ 31%**](https://www.amazon.com/dp/B006QQRY2O) [**Nature Made Iron 65 mg (from Ferrous Sulfate) Tablets for Red Blood Cell Formation (365 ct.).**Nature Made**$15.93**4.8★**▲ 30%**](https://www.amazon.com/dp/B0CLP13YQ6) [**The Vitamin Kitchen Ferrous Sulfate 325 mg (65 mg Elemental Iron) High Potency Iron Supplement - High Potency Iron Pills for Red Blood Cells - No Artificial Color Additives - 220 Tablets Made in USA**The Vitamin Kitchen**$7.24**4.6★**▲ 23%**](https://www.amazon.com/dp/B0F7GY98D9) [**THORNE - Advanced Iron Complex - Complete Blood Support Formula* - Elemental Iron Folate B and C Vitamins for Optimal Absorption - Chelated Iron Supplement - Gluten Dairy & Soy-Free - 60 Capsules**THORNE**$25.51**4.6★**— 8%**](https://www.amazon.com/dp/B0797PJQMT)
**~~View all trending →~~**
## **What buyers say about ferrous sulfate 325mg**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Iron**21%
*“Excellent Iron supplement”*
**Quality-Overall**14%
*“Excellent Product”*
**Value For Money**9%
*“Great deal”*
**Advertised Vs Actual Product**8%
*“As advertised”*
**Vitamin**6%
*“Great vitamin”*
**Efficiency**4%
*“It's effective”*
**Ease Of Use**4%
*“Convenient to use”*
**Energy Level**3%
*“Boost energy”*
**Ease Of Chewing/Swallowing**3%
*“Easy to Swallow”*
**Acid Regulator/Stomach Ache Relief**3%
*“No tummy upset”*
### **What buyers complain about **
**Iron**19%
*“I had very low iron levels”*
**Taste-Overall**12%
*“Weird taste”*
**Acid Regulator/Stomach Ache Relief**8%
*“Hurt my stomach horribly”*
**Side Effects**5%
*“Made me extremely dizzy”*
**Regulates Digestion**3%
*“Causes constipation”*
**Quality-Overall**2%
*“Piece of garbage”*
**Value For Money**2%
*“Expensive”*
**Advertised Vs Actual Product**2%
*“False advertisement”*
**Ingredients-Overall**2%
*“Bad filler ingredients”*
**Vitamin**2%
*“These are the worse vitamins that Ive EVER taken”*
### **Top return reasons **
**Iron**24%
**Acid Regulator/Stomach Ache Relief**20%
**Regulates Digestion**9%
**Functionality-Overall**7%
**Advertised Vs Actual Product**7%
**Smell**6%
**Ingredients-Overall**4%
**Quality-Overall**4%
**Side Effects**4%
**Dosage**4%
## **Common questions**
- **Is ferrous sulfate 325mg profitable to sell on Amazon United States?**
- The niche generates $1.3M/yr across 9 tracked products. 90-day search growth is +8.5%. Flapen's verdict: Skip it (49/100).
- **How competitive is the ferrous sulfate 325mg niche?**
- 8 brands and 131 sellers compete. The top 5 products take 88% of clicks and top 5 brands hold 91% of demand.
- **What do buyers complain about in ferrous sulfate 325mg?**
- Top complaints mined from reviews: Iron, Taste-Overall, Acid Regulator/Stomach Ache Relief. The return rate is 0.0%.
- **When does demand for ferrous sulfate 325mg peak?**
- Demand peaks in Aug–Sep; the busiest month runs 5.0× the quietest.
- **What does it cost to enter the ferrous sulfate 325mg niche?**
- Listings span $4.84–$25.51; the average listing price is $12.48 (sweet spot $15–$100). The average incumbent carries 12,747 reviews — the moat a new listing must climb.
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