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Synthroid is a synthetic form of T4, the thyroid hormone. Cytomel is a synthetic form of T3, another thyroid hormone. Both are very similar to the naturally-occuring forms of thyroid hormone in the body. It would be best to discuss your options with your physician.
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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.