mineral · for low stamina
Ferrous Sulfate
Iron carries oxygen to your muscles. Even mildly low iron drags your capacity down.
Say that in clinical terms
Iron is critical for oxygen transport via hemoglobin and muscle oxygen storage via myoglobin. It also supports mitochondrial cytochrome function. Even subclinical iron deficiency (low ferritin, normal hemoglobin) reduces exercise capacity.
How strong is the research?
Solid evidence
Only one study
1 paper read, 1 supporting.
How much to take
daily on empty stomach
18–36 mg
Test ferritin before supplementing. Athletes and menstruating women are at higher risk of depletion. Target ferritin >30 ng/mL.
Before you take it
- Iron supplementation without confirmed deficiency (serum ferritin or CBC) carries no established benefit for exercise performance or stamina; benefit in trials is restricted to iron-deficient or iron-depleted populations.