Arthritis prevented through regular sunlight exposure?
Interesting long term study finds again that a lack of vitamin D from healthy sunlight exposure has links to an autoimmune disease; rheumatoid arthritis (RA).
What did the 36 year analysis discover?
- More intense sunlight exposure was linked with a decreased incidence of RA among women
- There was no significant heterogeneity according to physical activity, weight status, skin type or vitamin D intake
- Women (ages 30 to 55) living in areas with the highest ultraviolet B (UVB) intensity had a 21% lower risk for RA compared with those living in states with low UVB levels
- Many epidemiologic studies have found a link between lower sun exposure and an increased incidence of RA and other autoimmune diseases
Study by Arkema E, et al “Exposure to ultraviolent-B and risk of developing rheumatoid arthritis among women in the Nurses’ Health Study” as published in Annals of the Rheumatic Diseases 2013; DOI: 10.1136/annrheumdis-2012-202302. Elizabeth Arkema, PhD, and colleagues from Harvard University averaged cumulative UVB flux data for 106,368 women in NHS and 115,561 women in NHSII according to the state in which they lived (1976-2012). MedPage Today reports UVB flux being a measure that reflects exposure intensity based on altitude, latitude, and typical cloud cover patterns, and is expressed in Robertson-Berger units. As reported by MedPage Today on February 04, 2013.