Evidence supporting the use of: Licorice root
For the body system: Thyroid Gland

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Synopsis

Source of validity: Traditional
Rating (out of 5): 1

Licorice root (Glycyrrhiza glabra) has been used in traditional herbal medicine systems, such as Traditional Chinese Medicine (TCM) and Ayurveda, for a variety of health concerns, including as a general tonic and for adrenal support. Its relevance to thyroid health is primarily traditional rather than scientific. In these traditions, licorice is believed to support the endocrine system broadly, which may include the thyroid gland by extension. However, direct traditional references to licorice root specifically for thyroid disorders are limited.

From a scientific standpoint, there is little direct evidence that licorice root has a specific or significant effect on thyroid gland function. Most research on licorice focuses on its anti-inflammatory, adaptogenic, and corticosteroid-mimicking properties due to its active compound, glycyrrhizin. Some studies suggest licorice may affect cortisol metabolism and the hypothalamic-pituitary-adrenal (HPA) axis, but these effects do not translate directly to proven thyroid support in human clinical trials.

In summary, licorice root’s reputation for supporting the thyroid is based mainly on traditional uses for general endocrine and adrenal health, and there is little direct scientific validation for its role in thyroid support. Individuals with thyroid conditions or on thyroid medications should consult healthcare professionals before using licorice root, as it can interact with various medications and may have side effects with prolonged use.

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