Also known as: ferrous bisglycinate, iron bisglycinate, ferrous sulfate
Latest evidence update: 2026-05-13
Strongest in Sample size (95). Held back by Recency (31).
Solid mix of RCTs with some methodological gaps.
Confirmed across many independent studies with significant findings.
Tens of thousands of participants pooled across studies.
Mostly aligned, with some divergence.
Mostly pre-2020 research; updates may be needed.
Recommended: 18-27mg daily (if deficient)
ProtocolEngine provides general health information based on published research. This is not medical advice. Consult a healthcare professional before starting any supplement or health protocol.
High-dose intravenous iron may reduce the need for blood transfusions and improve blood oxygen levels after heart surgery
Intravenous and oral iron supplementation during pregnancy have similar effects on pregnancy outcomes and newborn health
Salt fortified with iron and iodine can increase blood hemoglobin levels and reduce the risk of iron deficiency anemia
Malaria infection reduces iron and other key minerals in the body, which can weaken immune function and worsen disease severity
The effect of iron supplementation on children's thinking and learning abilities remains unclear and needs more research