Ferrous Sulfate
The standard inorganic iron salt and the comparator in most iron trials. Better studied but less well tolerated than chelated forms such as bisglycinate.
What it’s good for
Ferrous Sulfate for Low Stamina
Solid1 study · 1 supporting · 0 against
1 safety note
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.
Dose: 18–36 mg