Iron Supplement
Worth a lookShows a $16.6M/yr market, but a failed launch gate (market size, growth, or returns) keeps it on the watch list.
Market size
Incredible$16.6M$16.6M/yr · 6.4M searches
Returns
Incredible0.0%return rate — above 5% kills the launch gate
Conversion
Incredible12.9%search→purchase rate — share of searches ending in a sale
Avg price
Great$20.10avg listing price — sweet spot $15–$100
Price range
Great$3.92–$87.14cheapest to priciest tracked listing — scored on the share inside $15–$100
Brand share
Good72%top-5 brand share — brands hold most of the demand
Competition
Okay57%top-5 click share — leaders hold, buyers still browse
Growth
Bad-0.2%90-day search growth — must beat 0% to launch
Quality gap
Bad4.6★avg incumbent rating — lower means beatable quality
Review moat
Bad11,779.77avg incumbent reviews — the moat a new listing must climb
Is iron supplement profitable on Amazon?
According to Flapen's Amazon United States niche tracking, iron supplement is a $16.6M/yr Amazon United States market (6.4M searches/yr). The top 5 brands hold 72% of demand. Verdict: Worth a look — 63/100.
Data updated Jul 28, 2026 · scored weekly · How we score niches
iron supplement market size & sales
Units sold, revenue, conversion and listing quality across the tracked shelf.- Units sold / yr
- 800K–1.0M
- avg 40,000–50,000/product
- Revenue / yr
- $16.1M–$20.1M
- units × avg price
- Conversion rate
- 12.9%
- Avg BSR
- #67
- Page quality
- 0%
- Prime
- 100%
- Sponsored
- 85%
- Out of stock
- 0.0%
- Avg brand age
- 76 months
- Avg seller age
- 151 days
Competition: brands, sellers & click share
The top 5 products take 57% of clicks — established leaders, but buyers still shop beyond them.Brands
21 rising
Sellers
730
Top-5 brand share
72%
Top 20: 99%
Top-5 click share
57%
Top 20: 92%
Open market
24%
- Nature Made25%
- Nature's Bounty24%
- THORNE10%
- MegaFood8%
- NUTRAHARMONY5%
- Pure Encapsulations4%
iron supplement demand & seasonality
Weekly Amazon search volume, last 104 weeks — -0.2% search growth over the last 90 days.No pronounced peak months · busiest ÷ quietest = 1.2×
Top iron supplement search terms shoppers use
The exact queries shoppers type, with yearly volume, growth and conversion.- iron supplement3.3M/yr
- iron supplement for women1.4M/yr
- iron pills370K/yr
- iron supplements for men215K/yr
- iron vitamins85K/yr
- iron supplements136K/yr
- iron pills for women128K/yr
- iron tablets103K/yr
- iron 65mg64K/yr
- hierro para mujeres con anemia93K/yr
Top iron supplement 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 24 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Nature Made Iron 65 mg (325 mg Ferrous Sulfate) Tablets 180 Tablets
Nature Made$6.134.7★55,047 rev
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
THORNE - Iron Bisglycinate - 25 mg Iron Supplement for Enhanced Absorption Without Gastrointestinal Side Effects* - NSF Certified for Sport - Gluten-Free - 60 Servings
THORNE$15.644.7★8,578 rev
Iron Supplement for Women - Iron 65mg (Ferrous Sulfate 325mg) - 60 Caps
NUTRAHARMONY$17.764.6★2,124 rev
Pure Encapsulations Iron-C - 15 mg - 175 mg Vitamin C - Red Blood Cell Support* - Energy Production - Highly Bioavailable Iron Pill - for Women & Men - Gluten Free & Vegan - 60 Capsules
Pure Encapsulations$13.434.7★3,138 rev
Newest
by launch date
Sports Research Blood Balance Iron Supplement 36mg 90 Liquid Caps
Sports Research$24.76182 rev
Ritual Iron Bisglycinate Supplement 60mg - 48-Hour Dosing - 15 Capsules
Ritual$23.82305 rev
OLLY Delightful Iron Chewable Tablet Iron Supplement from AB Fortis Fruit Punch Flavored 30 or 20 Day Supply - 60 Count
OLLY$12.901,137 rev
Naked Iron 65mg 325mg Ferrous Bisglycinate - High Potency Iron Supplement for Iron Deficiency Cellular Energy Support Promotes Healthy Red Blood Cell Production Non-GMO Gluten-Free 60 Capsules
NAKED$13.01821 rev
Iron Supplement for Women - Iron 65mg (Ferrous Sulfate 325mg) - 60 Caps
NUTRAHARMONY$17.762,124 rev
Trending
90-day click momentum
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★
Sports Research Blood Balance Iron Supplement 36mg 90 Liquid Caps
Sports Research$24.764.7★
Ritual Iron Bisglycinate Supplement 60mg - 48-Hour Dosing - 15 Capsules
Ritual$23.824.5★
Iron Supplement for Women - Iron 65mg (Ferrous Sulfate 325mg) - 60 Caps
NUTRAHARMONY$17.764.6★
NATURELO Vegan Iron Supplement with Vitamin C and Organic Whole Foods - Gentle Iron Pills for Women & Men with Iron Deficiency Including Pregnancy Anemia and Vegan Diets - 90 Mini Capsules
NATURELO$21.454.6★
What reviews say buyers love and hate about iron supplement
What buyers praise and complain about, mined from review topics.What buyers love
“Great iron pills”
“This is a high quality product which has been of significant help in my case”
“No constipation or stomach upset”
“Great vitamin”
“very affordable”
“Works as stated”
“Boost energy”
“Easy to digest”
“No weird after taste”
“it seems to be doing good”
What buyers complain about
“No iron in them”
“Disgusting taste”
“Horrible stomach pain”
“Made me nauseous”
“it is mildly constipating for me”
“extremely expensive”
“It was hard to remove”
“65mg in a serving is a MASSIVE dose”
“I couldn't function”
“Megadose of unwanted vitamins such as B12”
Top return reasons
Common iron supplement questions
- Is iron supplement profitable to sell on Amazon United States?
- The niche generates $16.6M/yr across 26 tracked products. 2 of 2 products launched in the last 360 days are still selling. 90-day search growth is -0.2%. Flapen's verdict: Worth a look (63/100).
- How competitive is the iron supplement niche?
- 21 brands and 730 sellers compete. The top 5 products take 57% of clicks and top 5 brands hold 72% of demand.
- What do buyers complain about in iron supplement?
- Top complaints mined from reviews: Iron, Taste-Overall, Acid Regulator/Stomach Ache Relief. The return rate is 0.0%.
- When does demand for iron supplement peak?
- Demand is steady year-round — the busiest month runs 1.2× the quietest.
- What does it cost to enter the iron supplement niche?
- Listings span $3.92–$87.14; the average listing price is $20.10 (sweet spot $15–$100). The average incumbent carries 11,780 reviews — the moat a new listing must climb.