Hypothyroidism: Can calcium supplements interfere with treatment?

Is it true that calcium supplements interfere with hypothyroidism treatment?

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Answer

Yes, it is true. Calcium supplements can interfere with your body's absorption of levothyroxine, a synthetic thyroid hormone. But this problem primarily occurs when you take calcium supplements and levothyroxine at or near the same time. To avoid an interaction, take your calcium supplements at least four hours before or after levothyroxine.

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