M.S., the Sun, and Vitamin D

Posting Date: 01/28/2004

Deadly Disease Linked to Lack of Sunlight-Generated Vitamin D

Two recent scientific studies published or announced within the past two weeks point to the benefit of sun exposure. The studies have linked a lack of exposure to Vitamin D, which is created naturally by sunshine or artificial ultraviolet light, as a significantly increased risk factor for developing multiple sclerosis.

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Two recent scientific studies published or announced within the past two weeks have linked a lack of exposure to Vitamin D, which is created naturally by sunshine or artificial ultraviolet light, as a significantly increased risk factor for developing multiple sclerosis.

A Harvard study published in the January 13 issue of the respected medical journal, Neurology ? the scientific journal of the American Academy of Neurology ? has identified a lack of Vitamin D as a principle indicator in incidence of the deadly, debilitating disease, multiple sclerosis in women. The study?s author, Kassandra Munger, MSc, of Harvard School of Public Health in Boston ? noted that the body makes vitamin D through exposure to sunlight?s UV-B ultraviolet rays.

In addition, sunshine may protect against the development of multiple sclerosis, according to the findings of an Oxford University study to be published in next month?s Journal of Epidemiology and Community Health. According to that study, the exact causes of MS remain unknown, but the disease becomes more prevalent the further away people live from the equator. Records spanning over 30 years ? from 1963 up to 1999 ? of people with MS and other autoimmune or neurological diseases were included in the study. Scientists at the Unit of Health-Care Epidemiology, Department of Public Health at Oxford conducted this research.

According to the authors of that study, a minimum level of UV exposure throughout the year might therefore be important in conferring protection. They feel this exposure has the potential to better protect individuals against the development of MS by beneficially influencing the immune system response, possibly through changes to the production of vitamin D and melanin, the substance involved in acquiring a tan.