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Thyroid extract

Synonyms/Common Names/Related Substances:

  • Armour Thyroid®, Bio-Throid®, desiccated thyroid, desiccated thyroid extract, dry thyroid extract, glandular, glandular thyroid, homologous thyroid gland, human crude thyroid extract, hyperthyroidism, hypothyroidism, levothyroxine, levothyroxine sodium, liothyronine, LOCO X112, L-thyroxine, natural thyroid, natural thyroid hormone, Nature-Throid, Naturethroid®, raw thyroid, T3, T4, Thyranon, thyreoideum, thyroid BP, thyroid subcellular fractions, thyroid USP, Thyroideum siccum, thyroxine, triiodothyronine, Westhroid®.

Clinical Bottom Line/Effectiveness

Brief Background:

  • Thyroid extracts are derived from animal thyroid tissue. Thyroid extract is a type of glandular nutritional supplementation that refers to dried and ground-up raw animal tissues or extracts of these tissues. Desiccated thyroid, such as the brand Armour® Thyroid, is derived from animal tissues, typically bovine or porcine thyroid. It contains both liothyronine (T3) and levothyroxine (T4).
  • Thyroid hormones have a wide range of actions. They increase rates of growth and metabolism and thereby increase respiratory rate, body temperature, heart rate, reproductive behavior, and energy expenditure.
  • Although thyroid extract has been traditionally used to replace patients' normal thyroid activity, results from open-label studies do not support the use of thyroid extract for hypothyroidism (1;2).

Dosing/Toxicology

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Precautions/Contraindications

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Interactions

Most herbs and supplements have not been thoroughly tested for interactions with other herbs, supplements, drugs, or foods. The interactions listed below are based on reports in scientific publications, laboratory experiments, or traditional use. You should always read product labels. If you have a medical condition, or are taking other drugs, herbs, or supplements, you should speak with a qualified healthcare provider before starting a new therapy.

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Mechanism of Action

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History

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Evidence Table

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Evidence Discussion

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Products Studied

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Author Information

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References

Natural Standard developed the above evidence-based information based on a thorough systematic review of the available scientific articles. For comprehensive information about alternative and complementary therapies on the professional level, go to www.naturalstandard.com. Selected references are listed below.

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The information in this monograph is intended for informational purposes only, and is meant to help users better understand health concerns. Information is based on review of scientific research data, historical practice patterns, and clinical experience. This information should not be interpreted as specific medical advice. Users should consult with a qualified healthcare provider for specific questions regarding therapies, diagnosis and/or health conditions, prior to making therapeutic decisions.