Does Cal-Mag interact with my thyroid medication?

Yes, calcium can significantly interfere with the absorption of thyroid hormones like levothyroxine. If you take thyroid medication, it is typically recommended to wait at least four hours before taking any supplement containing calcium to ensure your medication works correctly.

About Cal-Mag Support: A Direct Guide to Calcium and Magnesium Benefits

This answer is drawn from the full physician-reviewed guide to Cal-Mag Support: A Direct Guide to Calcium and Magnesium Benefits on the GOAL.MD Vitamin Shop learning hub. Read the full guide for mechanism of action, evidence, dosing, safety, and interactions.

Medically reviewed by Dr. Michael Mimlitz, MD (NPI 1508891870), Chief Physician of GOAL.MD. Physician-supervised telehealth. More at goal.md/answers.