Slow Fe Market Report: Sales Volume, Market Share, Leading Brands & Market Trends
Slow Fe sales on Amazon US totaled 288,300 units in July 2026 (▲ 1.3% vs. the prior month), generating an estimated $4,604,075 in revenue across the 50 top-ranked ASINs for this search term. Demand is heavily concentrated at the top of the ranking — the ten best performers capture 65.2% of unit volume and 55.3% of revenue, while a typical listing is priced at $20.18. The keyword itself pulled 19,859 Amazon queries over the same period (▼ 0.5% MoM).
Zooming out to the 12-month window ending July 2026, the slow fe Top 50 moved 2,811,650 units and $44,686,894 in cumulative sales — an average of 234,304 units and $3,723,908 per month. Monthly throughput topped out at 288,300 units in July 2026 and dipped to 121,100 in May 2026, leaving the latest reading 14.2% higher than August 2025.
Slow Fe Sales Trend (Trailing 12 Months)
Based on the top 50 ASINs by monthly sales for this keyword
2025/08
2025/09
2025/10
2025/11
2025/12
2026/01
2026/02
2026/03
2026/04
2026/05
2026/06
2026/07
Monthly Sales 2026/07
288.3K
▲ 1.3% MoM
Monthly Revenue 2026/07
$4.6M
▼ 0.2% MoM
Top 10 Market Share 2026/07
65.2%
Slow Fe Market Share & Sales Concentration on Amazon US — July 2026
The most-sold slow fe listing on Amazon US in July 2026 is ASIN B003PGJLRO (Brand: Nature Made), which sold 50,000 units at $7.06 apiece — equal to 17.3% of every unit tracked in this report.
The Top 10 ASINs account for 188,000 units and $2,546,300 in July 2026 — 65.2% of unit volume and 55.3% of revenue among all 50 ranked ASINs in this report.
Sales Volume of Top ASINs for 'Slow Fe' on Amazon
July 2026
Is 65.2% Top 10 share highly concentrated?
Ask AI to evaluate competition, market structure, and entry opportunities using ’s tracked Amazon sales, ranking, and keyword data.
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Top 5 Volume Share breakdown
B003PGJLRO
Nature Made Iron 65 mg (325 mg Ferrous Sulfate) Tablets, 180 Tablets | Iron Supplements for Men and Women with an Iron Deficiency, Dietary Supplement for Red Blood Cell Support, 180 Day Supply
50K
▲ 0.0%vs. prior month
$327K
latest month
12-month trend
B0797GZDZL
THORNE Iron Bisglycinate, 25 mg Iron Supplement, 60 Capsules | Enhanced Absorption Without Gastrointestinal Side Effects*, Chelated Iron Capsules, Gluten-Free, NSF Certified for Sport
50K
▲ 25.0%vs. prior month
$790K
latest month
12-month trend
B00140Z5DW
Vitron-C Iron Supplement Plus Vitamin C, Immunity Support, 60 Ct | Supports Immunity and Boosts Energy, High Potency Iron, Support Red Blood Cell Production, Dye Free Tablets
20K
▲ 0.0%vs. prior month
$250.2K
latest month
12-month trend
B000F4ZRCC
MegaFood Blood Builder Iron Supplement, Energy Support, Vegan, 90 Tablets | Increase Iron Levels Without Side Effects, Improves Energy Levels, B12, Folic Acid and Vitamin C for Absorption, 90 Servings
10K
▲ 0.0%vs. prior month
$268.4K
latest month
12-month trend
B00582WT6I
21st Century Slow Release Iron 45mg Tablets, Gentle on Stomach, 60 Count | High-Potency Ferrous Sulfate, Compare VS. Slow FE® & Healthy Red Blood Cells, Gluten Free, No Added Yeast, For Women & Men
10K
▲ 0.0%vs. prior month
$49.9K
latest month
12-month trend
B0061GLELG
Nature's Bounty Gentle Iron 28 mg Capsules, 90 Count | With Vitamin C, Folic Acid, Vitamin B-12, Non-GMO, Gluten-Free
10K
▲ 0.0%vs. prior month
$49.9K
latest month
12-month trend
Unlock to view all Top 50 ASIN competitors and their sales contributions
Best Slow Fe Brands on Amazon US — Top 3 Brand Sales Concentration (July 2026)
Nature Made is the best-performing slow fe brand in July 2026, moving 50,000 units across 1 ASIN for 26.6% of Top 10 volume. THORNE follows with 50,000 units (26.6%), ahead of Vitron-C on 20,000 units (10.6%).
With 10 brands splitting the Top 10 and 63.8% of volume sitting with three of them, this is a concentrated shelf — the leaders hold multiple listings or one very high-velocity ASIN, so a new entrant competes against established review moats rather than an open field. Average selling prices among the leaders run from $7.06 to $16.00, which frames the price band a competing listing has to justify.
Brand share of Top 10 volume
Nature Made
1 ASIN in Top 10
26.6%
Units
50K
Revenue
$327K
Avg. price
$7.06
B003PGJLRO
$7.06·★4.7·55.5K revsNature Made Iron 65 mg (325 mg Ferrous Sulfate) Tablets, 180 Tablets | Iron Supplements for Men and Women with an Iron Deficiency, Dietary Supplement for Red Blood Cell Support, 180 Day Supply
Units sold50K
THORNE
1 ASIN in Top 10
26.6%
Units
50K
Revenue
$790K
Avg. price
$16.00
B0797GZDZL
$16.00·★4.7·8.8K revsTHORNE Iron Bisglycinate, 25 mg Iron Supplement, 60 Capsules | Enhanced Absorption Without Gastrointestinal Side Effects*, Chelated Iron Capsules, Gluten-Free, NSF Certified for Sport
Units sold50K
Vitron-C
1 ASIN in Top 10
10.6%
Units
20K
Revenue
$250.2K
Avg. price
$11.82
B00140Z5DW
$11.82·★4.6·31.5K revsVitron-C Iron Supplement Plus Vitamin C, Immunity Support, 60 Ct | Supports Immunity and Boosts Energy, High Potency Iron, Support Red Blood Cell Production, Dye Free Tablets
Units sold20K
Trending Slow Fe Products — Growth Leaders & New Top 10 Entrants
Based on July 2026 data, this shortlist surfaces the two kinds of ASIN worth keeping an eye on — the ones that just broke into the Top 10, and the ones growing fastest month over month. Specifically, one ASIN forced its way in: B07CJX4M8K booked 8K units at $17.88, with ▲ 0.0% MoM change. On the growth side, B0CBK2672G leads positive momentum with ▲ 100.0% MoM growth on 2K units, with B09J9WL7N8 close behind at ▲ 50.0% MoM on 3K units.
The two signals carry different weight. A fresh entrant means share has already changed hands — an incumbent gave up its place to make room, so any competitive set drawn up a month ago is now out of date. A steep growth rate works as the earlier warning: it marks demand that is still compounding, usually a month or two before the ranking catches up to it.
B07CJX4M8K
SlowMag Muscle & Heart Magnesium Chloride Supplement with Calcium, 120 Count, Supports Muscle Relaxation, Heart, Nerve & Bone Health, High Absorption
Price
$17.88
Rating
4.7
Reviews
11K
Latest month sales
B0CBK2672G
Iron Gummies for Women 25mg for Iron Deficiency, No Constipating, 60 Cts | Vegan Iron Supplement + Beet Root, Vitamin C D3 B6 B12, Methlyfolate for Anemia, Fatigue, Focus, Gentle Digestion, Sugar Free
Price
$29.89
Rating
4.6
Reviews
402
Latest month sales
B09J9WL7N8
Vitron-C Iron Supplement for Women with Vitamin C, 60 Ct | Immunity Support Iron Supplements with Vitamin C, Iron Pills for Immune Support, Red Blood Cell Production
Unlock to view ASIN details and product titles
Price
$11.00
Rating
4.7
Reviews
2.2K
Latest month sales
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