Iron is required for thyroid hormone synthesis, and iron deficiency impairs thyroid function.
Iron is a cofactor for thyroid peroxidase (TPO), the enzyme that synthesizes thyroid hormones.
Ensure adequate iron intake for optimal thyroid function, especially in menstruating women.
Known drug category interactions for these supplements. Especially relevant if you take prescription medications.
Iron reduces levothyroxine absorption.
Take levothyroxine at least 4 hours before or after iron supplements.
Reference values for safe daily intake of these supplements.
GI distress above UL. Risk of iron overload in people with hemochromatosis.
Excess can cause thyroid dysfunction.