Magnesium may reduce thyroid med absorption
Magnesium can form complexes with levothyroxine, though effect is less pronounced than calcium or iron. Still recommended to separate doses.
Take thyroid medication at least 4 hours before magnesium.
Separate by 4 hours minimum
Magnesium may reduce thyroid med absorption. Take thyroid medication at least 4 hours before magnesium.
Separate by 4 hours minimum
This interaction is rated “Caution” by Formulate. Magnesium can form complexes with levothyroxine, though effect is less pronounced than calcium or iron. Still recommended to separate doses.
The free checker lets you add any combination of supplements and medications at once. Formulate's desktop app goes further — every stack change surfaces interaction alerts automatically.
Medical disclaimer. This page is for educational purposes only and does not replace advice from a qualified healthcare provider.