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Nutrition

Calcium Iron Thyroid Absorption Gaps

Calcium iron thyroid absorption gaps block levothyroxine uptake when minerals and coffee sit too close to morning pills—separate timing keeps labs stable.

Calcium iron thyroid absorption gaps matter for morning levothyroxine: calcium carbonate, iron, magnesium, and fiber supplements within an hour can block gut uptake—TSH may rise despite taking pills daily. Coffee and soy-heavy breakfasts add smaller interference.

Separate thyroid medication by at least four hours from antacids and iron, or shift iron to evening per clinician. Consistency beats perfect fasting theater if timing is stable.

Common questions

  • Can you take levothyroxine with orange juice?

    Water is standard—some clinicians allow certain juices, but calcium-fortified drinks interfere like milk. Follow your prescriber's absorption rules consistently.

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