Association of vitamin D status and thyroid function among type 2 diabetic mellitus patients

Vitamin D is an important element for skeletal health and it may also affect extra-skeletal health such as association with autoimmune diseases.1–5 Inclusive studies in have reported an association between thyroid autoimmunity and 25-hydroxyvitamin D (25-OHD).6–8 Type 2 diabetes mellitus (T2DM) prevalence in Saudi Arabia is high, reaching up to 30%.9 Vitamin D deficiency (VDD) remains a major health problem.10 VDD has received special attention lately because of its high incidence and its implication in the genesis of multiple chronic illnesses. The high prevalence of VDD in general population underlines the fact that VDD is more common in chronic diseases like diabetes mellitus.