Top pick · DoseRank
Why this ranks #1 for exercise capacity
#1
21st Century, Iron, 65 mg, 120 Tablets
21st Century$0.04 / serving4.7 · 24,664Available now
Why this ranks here
- Evidence fitFerrous Sulfate has moderate human evidence for this outcome.
- Dose fitFerrous Sulfate at 65 mg lands inside the studied 65-130 mg window.
- Price / serving$0.04 per serving — low price tier for this outcome.
- AvailabilityIn stock across major retailers; 99% availability confidence.
- TrustStrong trust signals — consistently high marks from verified buyer ratings.
Trade-offs
Dose fit is the weak spot on this list
The numbers
18
19
67
93
65 mgIn rangeinside the studied 65-130 mg window