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Salvatore Minisola, Luciano Colangelo, Cristiana Cipriani, Jessica Pepe, Dana Paulina Cook and Chantal Mathieu

Few topics have elicited more emotion than the issue of screening for vitamin D status and the discussion on the need for global supplementation with vitamin D metabolites. The importance of the problem is highlighted by the USPSTF posted draft research plan with the aim of making an update recommendations statement, possibly next year. Here, we discuss two different viewpoints on screening for vitamin D status: for and against. In the literature there are scientifically sound opinions supporting pro and cons positions. However, we believe that the best way to definitively elucidate this issue is the implementation of a randomized controlled trial evaluating clinical outcomes or harms in persons screened versus those not screened for vitamin D deficiency. The feasibility of such a trial is probably questionable owing to uncertainties still present concerning threshold for vitamin D sufficiency and end points (that is, for example, improved bone mineral density, reduced risk of falls and so on) to be reached.

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Giovanna Muscogiuri, Joanna Mitri, Chantal Mathieu, Klaus Badenhoop, Gonca Tamer, Francesco Orio, Teresa Mezza, Reinhold Vieth, Annamaria Colao and Anastassios Pittas


It has been suggested that vitamin D may play a role in the pathogenesis of several endocrine diseases, such as hyperparathyroidism, type 1 diabetes (T1DM), type 2 diabetes (T2DM), autoimmune thyroid diseases, Addison's disease and polycystic ovary syndrome (PCOS). In this review, we debate the role of vitamin D in the pathogenesis of endocrine diseases.


Narrative overview of the literature synthesizing the current evidence retrieved from searches of computerized databases, hand searches and authoritative texts.


Evidence from basic science supports a role for vitamin D in many endocrine conditions. In humans, inverse relationships have been reported not only between blood 25-hydroxyvitamin D and parathyroid hormone concentrations but also with risk of T1DM, T2DM, and PCOS. There is less evidence for an association with Addison's disease or autoimmune thyroid disease. Vitamin D supplementation may have a role for prevention of T2DM, but the available evidence is not consistent.


Although observational studies support a potential role of vitamin D in endocrine disease, high quality evidence from clinical trials does not exist to establish a place for vitamin D supplementation in optimizing endocrine health. Ongoing randomized controlled trials are expected to provide insights into the efficacy and safety of vitamin D in the management of endocrine disease.