THE IMPACT OF A GLUTEN-FREE DIET ON THYROID AUTOIMMUNITY IN DRUG-NAÏVE WOMEN WITH HASHIMOTO'S THYROIDITIS

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Kanhaiya Prasad

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Abstract

The aim of this research was to explore if a gluten-free diet influences thyroid autoimmunity, the functioning of the hypothalamic-pituitary-thyroid axis, and the outcomes of thyroid function tests among women diagnosed with Hashimoto’s thyroiditis who also showed positive results for anti-tissue transglutaminase antibodies. The study involved 68 women with autoimmune thyroiditis, divided into two distinct groups. The first group (group A, n = 32) adhered to a gluten-free diet for a duration of 6 months, whereas the other group (group B, n = 36) did not receive any dietary intervention. Measurements of serum levels for thyroid peroxidase and thyroglobulin antibodies, along with thyrotropin, free thyroid hormones, and 25-hydroxyvitamin D, were taken at both the start of the study and again after 6 months. Using the levels of thyrotropin and free thyroid hormones, Jostel’s thyrotropin index, SPINA-GT index, and SPINA-GD index were computed. All participants finished the study as intended. In group B, levels of serum thyrotropin and free thyroid hormones, along with 25-hydroxyvitamin D levels and the derived indices, did not show any significant changes. The gluten-free diet led to a decrease in thyroid antibody levels and a slight elevation in 25-hydroxyvitamin D levels and the SPINA-GT index. In group A, the effect on TPOAb and TgAb levels was associated with the modifications in the SPINA-GT index, while the changes in TPOAb correlated with variations in 25-hydroxyvitamin D levels. The findings imply that a gluten-free diet could offer clinical advantages for women suffering from autoimmune thyroid disorders.

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