Health LibraryMedicationsLevothyroxine: Educational Overview
Medications

Levothyroxine: Educational Overview

The synthetic thyroid hormone used to treat hypothyroidism.

Medically reviewed
Updated 2026
Do not self-medicate

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How it works

Levothyroxine replaces the T4 hormone that an underactive thyroid does not produce enough of.

Taking it correctly

Best taken on an empty stomach, 30–60 minutes before breakfast. Certain foods, calcium, and iron reduce absorption.

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Educational content only

Milli's Health Library provides general educational information reviewed against peer-reviewed medical sources. It is not a diagnosis, prescription, or medical advice. Milli does not recommend medications. Always consult a licensed doctor before starting, stopping or changing any treatment.

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