Folic Acid & Iron Together: Safety, Benefits & Timing

Folic acid (400–800 mcg) and iron (27 mg in pregnancy) are routinely combined in prenatal vitamins — safe and synergistic.

• Absorption: No negative interaction; vitamin C enhances iron, folate unaffected.
• Timing: With food reduces nausea; avoid calcium/tea/coffee within 2h (impair iron).
• Indications: Preconception (folate prevents NTDs), pregnancy, iron deficiency anemia.
• Monitoring: CBC, ferritin; adjust dose if constipation/nausea (try bisglycinate, alternate day).

Excess folic acid (>1 mg) may mask B12 deficiency; excess iron causes oxidative stress. Follow provider's dosing.