Solid evidencemineral
Ferrous Sulfate for Low Stamina
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
How much to take
18–36 mg
Test ferritin before supplementing. Athletes and menstruating women are at higher risk of depletion. Target ferritin >30 ng/mL.