Iron
Iron is essential for oxygen transport in the blood. Deficiency is the most common nutritional deficiency, especially in women of childbearing age.
What is it for?
RDA 27mg during pregnancy. Bisglycinate form better tolerated
Especially in women with deficiency
Replenish iron losses from heavy menstruation
Prevent anemia before pregnancy. Check ferritin levels
Replenish postpartum stores. Check ferritin levels
💡 Absorption: Take with vitamin C to improve absorption. Avoid taking with coffee, tea, dairy, or calcium. Iron bisglycinate causes fewer gastric issues.
⚠️ Caution: Only supplement if deficiency is confirmed by lab testing. Excess is toxic. May cause constipation and nausea. In those under 18, use only under medical/pediatric supervision.
Recommended doses
Range: 14 – 45 mg
Bisglycinate. Only if confirmed deficiency
Interactions with other supplements
Iron and zinc compete for absorption. Take at separate times of day (minimum 2 hours apart).
⚕️ Medication interactions
Iron significantly reduces levothyroxine absorption. It can cause uncontrolled hypothyroidism.
→ Separar la toma al menos 4 horas. Tomar levotiroxina en ayunas por la mañana y hierro por la tarde.
Proton pump inhibitors reduce the gastric acidity needed to absorb non-heme iron.
→ Considerar hierro bisglicinato que no depende del pH gástrico. Separar tomas y consultar médico.
🏥 Contraindications
La suplementación con hierro está contraindicada en hemocromatosis. Puede causar daño orgánico grave.
→ No suplementar. Seguir indicaciones del hematólogo.
El hierro oral puede agravar la inflamación intestinal y causar molestias gastrointestinales.
→ Preferir hierro liposomal o intravenoso. Consultar gastroenterólogo.
📚 Scientific references (2)▼
Revision de biodisponibilidad. Bisglicinato de hierro tiene mayor absorcion y menos efectos gastrointestinales que sulfato ferroso.
Guia de la OMS. La deficiencia de hierro es la carencia nutricional mas comun en el mundo. Afecta al 25% de la poblacion mundial.
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