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Can Iodine-restricted Diets Normalise Serum Total Thyroxine (TT4) and Subsequently Improve Clinical Signs in Cats With Hyperthyroidism?
Published: 19/02/2019 in: Knowledge Summaries
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Abstract
PICO question
In cats with hyperthyroidism, does an iodine-restricted diet normalise the serum TT4 (total thyroxine) levels and reduce the severity of the clinical signs when compared to cats on a normal diet?
Clinical bottom lineWhilst there is some evidence that iodine-restricted diets can help to renormalise serum TT4 in cats with hyperthyroidism, this is not always effective and there is a lack of compelling evidence to suggest this is associated with a resolution of clinical signs in the long-term.
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References
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- Hui, T., Bruyette, D., Moore, G. & Scott-Moncrieff, J. 2015. Effect of Feeding an Iodine-Restricted Diet in Cats with Spontaneous Hyperthyroidism. Journal of Veterinary Internal Medicine, 29(4), pp.1063–1068. http://dx.doi.org/10.1111/jvim.13368
- van der Kooij, M., Becvarova, I., Meyer, H., Teske, E. & Kooistra, 2014. Effects of an iodine-restricted food on client-owned cats with hyperthyroidism. Journal of Feline Medicine and Surgery, 16(6), pp.491–498. http://dx.doi.org/10.1177/1098612X13512627
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- Scott-Moncrieff, J., Heng, H., Weng, H., Diemo, D. & Jones, M. Effect of a Limited Iodine Diet on Iodine Uptake by Thyroid Glands in Hyperthyroid Cats. Journal of Veterinary Internal Medicine, 29, pp.1322–1326. http://dx.doi.org/10.1111/jvim.13577
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