The Potential Dangers of Supplements and Herbal Products Marketed for Improved Thyroid Function

Victor Bernet; Ana-Maria Chindris

Disclosures

Expert Rev Endocrinol Metab. 2012;7(3):247-249. 

In This Article

Conclusion

Although the majority of nutritional supplements available on today's market contain vitamins, minerals, herbs and amino acids and are probably safe, the medical community is in need of studies that evaluate the potential benefits and adverse effects of such products to include any impact on thyroid function. The presence of active thyroid hormone in readily available supplements is of great concern, as the use of thyroid hormone, both T4 and T3, should only be carried out under medical supervision and should be reserved for use in patients with an appropriate indication, specifically confirmed hypothyroidism. We recommend that dietary supplements and herbs should be strictly regulated for hormonal content and that active thyroid hormone should be available only by prescription. In the meantime, healthcare providers should vigilantly screen all their patients for the use of herbal and dietary supplements and appropriately educate their patients on the potential drug interactions and side effects that can be associated with the use of such products.

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