Anemia prevention and oxygen transport

Iron

Iron is essential for hemoglobin and myoglobin function. Supplementation is clearly effective in iron-deficiency anemia. Supplementation without confirmed deficiency is not recommended and may be harmful.

Evidence Level A

Evidence and Risk Labels

Evidence A/B/C reflects research maturity, and risk levels reflect monitoring needs. These labels support comparison, not diagnosis or treatment decisions.

See full scoring guide

Clinical Snapshot

Effect Size
Large in deficiency states; no benefit in iron-replete individuals
Safety
Moderate Risk

Iron overload causes oxidative damage and organ toxicity; always confirm deficiency via serum ferritin and transferrin saturation before supplementing. Hemochromatosis is an absolute contraindication.

Research Dosing

This reflects common ranges and protocols used in published studies, not personal medical advice.

Typical Daily Dose
15-200 mg elemental iron (depending on deficiency severity)
Timing
On empty stomach for absorption; with food if GI intolerant
Protocol Duration in Studies
Until ferritin normalizes (typically 3-6 months)

Ferrous bisglycinate has better GI tolerability than ferrous sulfate at equivalent doses.

Best Fit Profiles

  • iron-deficiency anemia correction under medical supervision

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