Best Ferrous Sulfate
The best ferrous sulfate we track, ranked by real cost-per-dose — not paid placements. Across 6 tracked options the typical dose runs $0.06 per serving.
Updated July 2026prices checked what’s changed
Ranked across 6 products · prices checked Jul 11, 2026
How we rank
We rank by cost-per-dose — price ÷ servings, normalized to the daily dose— so bottle sizes and strengths compare fairly. Prices are scraped at publication and re-checked when the catalog refreshes (see the “Prices checked” stamp above). There is no paid placement and no kickback for ordering. Full methodology · Editorial standards.
That cost-per-dose number is the one most retailers and review sites leave out — they’ll show a sticker price and a serving size, but not what a day actually costs. We compute it for every product so you can compare like for like.
When cheapest ≠ best value
The cheapest bottle isn’t automatically the best value: a low-absorption form (magnesium oxide is the classic example) can look cheap per milligram yet deliver less of what you actually absorb. Where forms differ, compare cost per absorbed or elemental unit, not the compound weight on the label. A bigger bottle isn’t automatically cheaper per dose either — this list already ranks by cost per dose, so a larger count only wins if it truly costs less per serving. Compare Ferrous Sulfate forms.
Our data on this: the big bottle saves a median ~86% per serving · the gummy tax (~2× more) · the form premium · the price spread.
Full ranking by cost per dose
Cost-per-serving normalizes price across bottle sizes — a 60-count and a 365-count compare fairly.
| # | Product | Form · dose | Tested | Servings | Price | $ / serving | Buy |
|---|---|---|---|---|---|---|---|
| 1 | 21st Century, Iron Ferrous Sulfate, 325 mg, 120 TabsBest value | tablet · 325mg | 120 | $5.88 | $0.05 | See offer | |
| 2 | Basic Vitamins, Iron Ferrous Sulfate, 65 Mg, 100 Tabs | tablet · 65mg | 100 | $5.55 | $0.06 1.1× #1 | See offer | |
| 3 | Nutricost, Iron Ferrous Sulfate Tablets, 65 Mg, 240… | tablet · 65mg | 240 | $13.95 | $0.06 1.2× #1 | See offer | |
| 4 | Foster And Thrive, Iron Ferrous Sulfate, 65 Mg, 100 Tabs | tablet · 65mg | 100 | $5.99 | $0.06 1.2× #1 | See offer | |
| 5 | Best Naturals, Iron Ferrous Sulfate, 65 Mg, 240 Tabs | tablet · 65mg | 240 | $14.99 | $0.06 1.3× #1 | See offer | |
| 6 | Nature's Truth, Iron Ferrous Sulfate Coated Tablets, 65… | tablet · 65mg | 120 | $7.70 | $0.06 1.3× #1 | See offer |
See also: Ferrous Sulfate basics · all best-value rankings
Read: Ferrous Sulfate guides
Related comparisons, stacks & nutrients
Frequently asked
What is the best-value Ferrous Sulfate supplement?+
21st Century, Iron Ferrous Sulfate, 325 mg, 120 Tabs — $0.05 per serving ($5.88 for 120 servings), the lowest cost-per-dose ferrous sulfate in our Amazon US catalog as of July 2026.
How much does Ferrous Sulfate cost per day?+
The cheapest ferrous sulfate we track works out to $0.05 per serving, against a typical $0.06 per serving across 6 products. Retailers and review sites list a price and a serving size but rarely divide it out — this is what a day actually costs, as of July 2026.
What is the typical cost per dose for Ferrous Sulfate?+
About $0.06 per serving across 6 tracked ferrous sulfate products — the cheapest we track is $0.05 per serving, with most falling between $0.06 and $0.06.
What dose of Ferrous Sulfate do these supplements come in?+
The ferrous sulfate products we track range from 65mg to 325mg per serving. We rank by cost per serving so you can compare value across strengths — check the label for the dose that suits you.
References & sources
We link primary sources and paraphrase their findings — never copy their text, tables, or images. Cost-per-dose figures are our own first-party catalog data.