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ORIGINAL ARTICLE
Year : 2017  |  Volume : 29  |  Issue : 2  |  Page : 64-70

Effect of vitamin D3 in treating hyperthyroidism in patients with graves’ disease


1 Department of Internal Medicine, Ain Shams University, Cairo, Egypt
2 Department of Biochemistry, Ain Shams University, Cairo, Egypt

Correspondence Address:
Abeer A.A. Elewa
31 Police Building, Kornish El-Nile, Al Maadi, Cairo
Egypt
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/ejim.ejim_10_17

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Background Graves’ disease (GD) is an autoimmune disease characterized by hyperthyroidism secondary to circulating autoantibodies. Multiple factors contributed to its etiology, including genetic and environmental factors. The role of vitamin D is well-known in calcium metabolism and skeletal homeostasis. Vitamin D was shown to be a modulator in both innate and adaptive immunity. There is a link between vitamin D deficiency and various autoimmune diseases. The prevalence of vitamin D deficiency was reported to be common in patients with GD. Interestingly, vitamin D deficiency is found to be associated with higher thyroid volume in patients with newly-onset GD. However, vitamin D deficiency relationship with GD remains a controversial issue. Objective The objective of this study was to evaluate the effect of vitamin D supplementation in GD with and without ophthalmopathy. Patients and methods A randomized prospective study was conducted on 60 adult patients with GD aged 20–40 years. Group 1 comprised 20 patients with GD receiving a daily dose of 30 mg of methimazole alone. Group 2 comprised 40 patients with GD receiving the same dose of methimazole, supplemented with intramuscular injection of vitamin D3 200 000 IU/month for 3 months. Patients were followed up over a 3-month duration. Results There was hypovitaminosis D in all participants with a percentage of vitamin D deficiency (vitamin D level: <20 ng/ml) of 73.9% in male and 54.1% in female and a vitamin D insufficiency (vitamin D level: 20–29 ng/ml) of 26.1% in male and 45.9% in female. Vitamin D was significantly correlated with thyroid volume and degree of exophthalmos. On vitamin D supplementation, group 2 had significantly lower thyroid volume and better effect on the degree of exophthalmos. Conclusion Vitamin D supplementation for GD has a favorable effect on thyroid volume and on the degree of exophthalmos.


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