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Study reveals potential immune benefits of vitamin D supplements in healthy individuals
Date:3/20/2013

(Boston) Research from Boston University School of Medicine (BUSM) shows that improving vitamin D status by increasing its level in the blood could have a number of non-skeletal health benefits. The study, published online in PLOS ONE, reveals for the first time that improvement in the vitamin D status of healthy adults significantly impacts genes involved with a number of biologic pathways associated with cancer, cardiovascular disease (CVD), infectious diseases and autoimmune diseases. While previous studies have shown that vitamin D deficiency is associated with an increased risk for the aforementioned diseases, these results go a step further and provide direct evidence that improvement in vitamin D status plays a large role in improving immunity and lowering the risk for many diseases.

Vitamin D is unique in that it can be both ingested and synthesized by the body with sun exposure. It is then converted by both the liver and kidneys to a form that the body can use. An individuals' level of vitamin D, or their vitamin D status, is determined by measuring the level of 25-hydroxyvitamin D in the blood. Vitamin D deficiency, which is defined as a status of less than 20 nanograms per milliliter (ng/mL) of 25-hydroxyvitamin D, can cause a number of health issues, including rickets and other musculoskeletal diseases. Recently, however, data suggests that vitamin D deficiency (<20 ng/mL) and vitamin D insufficiency (between 21-29 ng/mL) is linked to cancer, autoimmune diseases, infectious diseases, type 2 diabetes and cardiovascular disease.

The randomized, double-blind, single-site pilot trial involved eight healthy men and women with an average age of 27 who were vitamin D deficient or insufficient at the start of the trial. Three participants received 400 International Units (IUs) of vitamin D per day and five received 2,000 IUs per day for a two-month period. Samples of white blood cells (immune cells) were collected at the beginning
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Contact: Jenny Eriksen
jenny.eriksen@bmc.org
617-638-6841
Boston University Medical Center
Source:Eurekalert

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