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Thyroid dysfunction following a kelp-containing marketed diet.
BMJ Case Rep 2014; 2014BC

Abstract

Complementary medications and herbal medicine for weight loss have become very popular. We report a case of thyroid dysfunction following the ingestion of a kelp-containing marketed diet in a 45-year-old woman with no previous thyroid disease. Signs of hyperthyroidism occurred shortly after a kelp-containing diet. Hyperthyroidism lasted 2 months and was followed by an overt hypothyroidism. The thyroid scintiscan exhibited an extremely low uptake and colour-Doppler ultrasonography revealed multiple small areas of pulsatile flow. After 3 months of levothyroxine substitutive therapy, normal thyroid function was recovered after levothyroxine discontinuation. This clinical history is compatible with a case of iodine-induced thyrotoxicosis followed by prolonged block of the sodium-iodide symporter activity as a consequence of excessive iodine consumption from kelp. Consumers of marketed diets containing kelp or other iodine-rich ingredients should be advised of the risk to develop a thyroid dysfunction also in the absence of underlying thyroid disease.

Authors+Show Affiliations

A.O.R.N. dei Colli Hospital, Naples, Italy.University of Salerno, Baronissi, Salerno, Italy.University of Molise, Campobasso, Italy.University of Salerno, Baronissi, Salerno, Italy.

Pub Type(s)

Case Reports
Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

25355748

Citation

Di Matola, Tiziana, et al. "Thyroid Dysfunction Following a Kelp-containing Marketed Diet." BMJ Case Reports, vol. 2014, 2014.
Di Matola T, Zeppa P, Gasperi M, et al. Thyroid dysfunction following a kelp-containing marketed diet. BMJ Case Rep. 2014;2014.
Di Matola, T., Zeppa, P., Gasperi, M., & Vitale, M. (2014). Thyroid dysfunction following a kelp-containing marketed diet. BMJ Case Reports, 2014, doi:10.1136/bcr-2014-206330.
Di Matola T, et al. Thyroid Dysfunction Following a Kelp-containing Marketed Diet. BMJ Case Rep. 2014 Oct 29;2014 PubMed PMID: 25355748.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Thyroid dysfunction following a kelp-containing marketed diet. AU - Di Matola,Tiziana, AU - Zeppa,Pio, AU - Gasperi,Maurizio, AU - Vitale,Mario, Y1 - 2014/10/29/ PY - 2014/10/31/entrez PY - 2014/10/31/pubmed PY - 2015/7/2/medline JF - BMJ case reports JO - BMJ Case Rep VL - 2014 N2 - Complementary medications and herbal medicine for weight loss have become very popular. We report a case of thyroid dysfunction following the ingestion of a kelp-containing marketed diet in a 45-year-old woman with no previous thyroid disease. Signs of hyperthyroidism occurred shortly after a kelp-containing diet. Hyperthyroidism lasted 2 months and was followed by an overt hypothyroidism. The thyroid scintiscan exhibited an extremely low uptake and colour-Doppler ultrasonography revealed multiple small areas of pulsatile flow. After 3 months of levothyroxine substitutive therapy, normal thyroid function was recovered after levothyroxine discontinuation. This clinical history is compatible with a case of iodine-induced thyrotoxicosis followed by prolonged block of the sodium-iodide symporter activity as a consequence of excessive iodine consumption from kelp. Consumers of marketed diets containing kelp or other iodine-rich ingredients should be advised of the risk to develop a thyroid dysfunction also in the absence of underlying thyroid disease. SN - 1757-790X UR - https://www.unboundmedicine.com/medline/citation/25355748/Thyroid_dysfunction_following_a_kelp_containing_marketed_diet_ L2 - http://casereports.bmj.com/cgi/pmidlookup?view=long&pmid=25355748 DB - PRIME DP - Unbound Medicine ER -