Hemoglobin Supplements
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
Incredible12.3%search→purchase rate — share of searches ending in a sale
Avg price
Great$19.48avg listing price — sweet spot $15–$100
Price range
Great$12.31–$26.74cheapest to priciest tracked listing — scored on the share inside $15–$100
Market size
Good$838K$838K/yr · 351K searches
Growth
Okay+0.1%90-day search growth — must beat 0% to launch
Review moat
Bad4,239.42avg incumbent reviews — the moat a new listing must climb
Quality gap
Bad4.6★avg incumbent rating — lower means beatable quality
Competition
Bad83%top-5 click share — a locked-up shelf
Brand share
Bad100%top-5 brand share — brand-locked demand
Is hemoglobin supplements profitable on Amazon?
According to Flapen's Amazon United States niche tracking, hemoglobin supplements is a $838K/yr Amazon United States market (351K searches/yr). The top 5 brands hold 100% of demand. Demand peaks in Aug–Oct. Verdict: Skip it — 48/100.
Data updated Jul 28, 2026 · scored weekly · How we score niches
hemoglobin supplements market size & sales
Units sold, revenue, conversion and listing quality across the tracked shelf.- Units sold / yr
- 40K–50K
- avg 6,000–8,000/product
- Revenue / yr
- $779K–$974K
- units × avg price
- Conversion rate
- 12.3%
- Avg BSR
- #129
- Page quality
- 0%
- Prime
- 100%
- Sponsored
- 58%
- Out of stock
- 0.0%
- Avg brand age
- 77 months
- Avg seller age
- 157 days
Competition: brands, sellers & click share
The top 5 products capture 83% of clicks — a locked-up shelf that new listings rarely crack.Brands
5 rising
Sellers
562
Top-5 brand share
100%
Top 20: 100%
Top-5 click share
83%
Top 20: 100%
Open market
0%
- NaturesPlus71%
- Feroglobin23%
- Floradix2%
- Vitabiotics2%
- Nature's Plus2%
hemoglobin supplements demand & seasonality
Weekly Amazon search volume, last 104 weeks — +0.1% search growth over the last 90 days.Peak months: Aug, Oct · busiest ÷ quietest = 2.9×
Top hemoglobin supplements search terms shoppers use
The exact queries shoppers type, with yearly volume, growth and conversion.- hemaplex iron supplement107K/yr
- feroglobin55K/yr
- hema plex40K/yr
- hemaplex30K/yr
- feroglobin liquid iron30K/yr
- hemoglobin12K/yr
- hemoglobin booster12K/yr
- hemoglobin supplements13K/yr
- hemoplex iron supplement9K/yr
- hema plex iron pills9K/yr
Top hemoglobin supplements 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 12 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
NaturesPlus Hema-Plex Iron - 60 Fast-Acting Softgels - 85 mg Iron + Vitamin C & Bioflavonoids for Healthy Red Blood Cells - Gluten Free - 20 Servings
NaturesPlus$13.804.7★8,369 rev
NaturesPlus Hema-Plex Iron - 60 Fast-Acting Capsules - 85 mg Chelated Iron + Vitamin C & Bioflavonoids for Healthy Red Blood Cells - Vegan Gluten Free - 30 Servings
NaturesPlus$16.084.7★3,301 rev
Vitabiotics Organic Feroglobin Liquid 500ml
Feroglobin$26.274.6★3,503 rev
Vitabiotics Feroglobin 200ml Plus Liquid
Feroglobin$17.164.7★1,790 rev
NaturesPlus Hema-Plex Iron - 30 Slow-Release Tablets Pack of 2 - Total Blood Health - 85 mg Chelated Iron - with Vitamin C & Bioflavonoids - Non GMO Vegetarian & Gluten Free - 60 Total Servings
NaturesPlus$26.284.7★356 rev
Newest
by launch date
NaturesPlus Hema-Plex Iron - 60 Slow-Release Mini-Tabs - 85 mg Chelated Iron - Total Blood Health - with Vitamin C & Bioflavonoids - Vegan Gluten Free - 30 Servings
NaturesPlus$13.93263 rev
NaturesPlus Hema-Plex Iron - 30 Slow-Release Tablets Pack of 2 - Total Blood Health - 85 mg Chelated Iron - with Vitamin C & Bioflavonoids - Non GMO Vegetarian & Gluten Free - 60 Total Servings
NaturesPlus$26.28356 rev
NaturesPlus Hema-Plex Iron - 60 Fast-Acting Softgels - 2 Pack - 85 mg Iron + Vitamin C & Bioflavonoids for Healthy Red Blood Cells - Vegan Gluten Free - 40 Total Servings
NaturesPlus$26.738,369 rev
Floradix Iron & Herbs - Liquid Herbal Supplement for Energy Support - Iron Supplement with Vitamin C & Vitamin B Complex - Ferrous Gluconate Iron - for Men & Women - 8.5 fl oz
Floradix$26.7419,689 rev
NaturesPlus Hema-Plex Liquid Iron Mixed Berry - 8.5 oz - Iron & Essential Nutrients - Vegan Gluten Free - 25 Servings
Nature's Plus$21.99324 rev
Trending
90-day click momentumNaturesPlus Hema-Plex Iron - 30 Slow-Release Tablets Pack of 2 - Total Blood Health - 85 mg Chelated Iron - with Vitamin C & Bioflavonoids - Non GMO Vegetarian & Gluten Free - 60 Total Servings
NaturesPlus$26.284.7★
Vitabiotics Feroglobin 200ml Plus Liquid
Feroglobin$17.164.7★
NaturesPlus Hema-Plex Iron - 60 Slow-Release Mini-Tabs - 85 mg Chelated Iron - Total Blood Health - with Vitamin C & Bioflavonoids - Vegan Gluten Free - 30 Servings
NaturesPlus$13.934.7★
Vitabiotics Organic Feroglobin Liquid 500ml
Feroglobin$26.274.6★
NaturesPlus Hema-Plex Iron - 60 Mixed Berry Chewables - 85 mg Elemental Iron - Total Blood Health - with Vitamin C & Bioflavonoids - Vegan Gluten Free - 20 Servings
NaturesPlus$12.314.3★
What reviews say buyers love and hate about hemoglobin supplements
What buyers praise and complain about, mined from review topics.What buyers love
“The best iron pills ever”
“This is a quality supplement”
“Good taste”
“Good energy boost”
“Very effective”
“gentle on my stomach”
“haven't had any digestive upsets”
“Best supplement”
“Easy enough to use”
“Felt so much better after a few pills”
What buyers complain about
“Low iron”
“It has a horrible aftertaste”
“leak in box”
“poured the rest of it down my sick”
“I need a stronger dose”
“Made my stomach hurt”
“It didn't work for me”
“Has faint odor and taste”
“Misleading, not adequate for children under 3”
“the instruction paper inside is dirty”
Top return reasons
Common hemoglobin supplements questions
- Is hemoglobin supplements profitable to sell on Amazon United States?
- The niche generates $838K/yr across 12 tracked products. 90-day search growth is +0.1%. Flapen's verdict: Skip it (48/100).
- How competitive is the hemoglobin supplements niche?
- 5 brands and 562 sellers compete. The top 5 products take 83% of clicks and top 5 brands hold 100% of demand.
- What do buyers complain about in hemoglobin supplements?
- Top complaints mined from reviews: Iron, Taste-Overall, Leak-Proof. The return rate is 0.0%.
- When does demand for hemoglobin supplements peak?
- Demand peaks in Aug–Oct; the busiest month runs 2.9× the quietest.
- What does it cost to enter the hemoglobin supplements niche?
- Listings span $12.31–$26.74; the average listing price is $19.48 (sweet spot $15–$100). The average incumbent carries 4,239 reviews — the moat a new listing must climb.