The short answer · Hemoglobin
Take ferrous sulfate for hemoglobin. This is the one to buy.
1
21st Century, Iron, 65 mg, 120 Tablets
4.7· 24,859 ratings· $0.04/serving
DoseRank score87
Ferrous Sulfate 65 mg — inside the studied 65-200 mg window
Of 3,139 products scored for Hemoglobin, 21st Century, Iron, 65 mg, 120 Tablets ranks #1 with a DoseRank score of 87. Ferrous Sulfate is the strongest evidence signal for this outcome.
The form“Why Ferrous Sulfate — not Ferrous Bisglycinate?”Evidence Strong evidence
Ferrous Sulfate is the strongest evidence signal for this outcome.
- Ferrous SulfateThe pick
Strong evidence · 65 mg
The standard reference form for iron supplementation; high elemental iron content and low cost, but frequent constipation, nausea, and dark stools limit tolerability.
- Ferrous Bisglycinate
Strong evidence · 27 mg
Iron chelated to glycine; significantly better absorbed than sulfate with minimal constipation or nausea - the preferred form for sensitive individuals or maintenance dosing.
The dose“Is the dose actually effective?”Dose fit 67
Ferrous Sulfate at 65 mg lands inside the studied 65-200 mg window.
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21st Century, Iron, 65 mg, 120 Tablets ranks #1 for Hemoglobin with a DoseRank score of 87. The score blends clinical strength, evidence, dose fit, trust signals and value across 3,139 products scored for this outcome.
Ferrous Sulfate is the strongest evidence signal for this outcome.
Ferrous Sulfate at 65 mg lands inside the studied 65-200 mg window. DoseRank scores this product's dose fit at 67 out of 100.
21st Century, Iron, 65 mg, 120 Tablets works out at $0.04 per serving. $0.04 per serving — low price tier for this outcome. Nothing else in this ranking costs less per serving.
No. Retailer links may be affiliate links, but rankings and placement are never paid. Every product is scored by the same public model, and the ranking is recomputed from the underlying product data rather than edited by hand.
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