The short answer · Exercise capacity
Take ferrous sulfate for exercise capacity. This is the one to buy.
1
21st Century, Iron, 65 mg, 120 Tablets
4.7· 24,859 ratings· $0.04/serving
DoseRank score18
Ferrous Sulfate 65 mg — inside the studied 65-130 mg window
Of 151 products scored for Exercise capacity, 21st Century, Iron, 65 mg, 120 Tablets ranks #1 with a DoseRank score of 18. Ferrous Sulfate has moderate human evidence for this outcome.
The form“Why Ferrous Sulfate?”Evidence Moderate evidence
Ferrous Sulfate has moderate human evidence for this outcome.
- Ferrous SulfateThe pick
Moderate 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.
The dose“Is the dose actually effective?”Dose fit 67
Ferrous Sulfate at 65 mg lands inside the studied 65-130 mg window.
Ferrous Sulfate
Studied window 65-130 mg · this pick 65 mg
Questions
Frequently asked
21st Century, Iron, 65 mg, 120 Tablets ranks #1 for Exercise capacity with a DoseRank score of 18. The score blends clinical strength, evidence, dose fit, trust signals and value across 151 products scored for this outcome.
Ferrous Sulfate has moderate human evidence for this outcome.
Ferrous Sulfate at 65 mg lands inside the studied 65-130 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. The cheapest ranked pick here is $0.04 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.