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Multiple sclerosis: Growing up in a sunny climate could reduce your risk

Growing up in a sunny locale can make you less likely to be at risk for multiple sclerosis later in life.

Researchers found those in areas where they are exposed to more of the sun’s rays, specifically UV-B rays, may be less likely to develop MS later in life.Exposure in childhood and young adulthood may also reduce risk, suggest the findings published online by the journal Neurology.While UV-B rays can cause sunburn and play a role in the development of skin cancer, they also help the body produce the so-called “sunshine vitamin”, D.Lower levels of vitamin D have been linked to an increased risk of MS.

Study author Professor Helen Tremlett, of the University of British Columbia in Canada, said: “While previous studies have shown that more sun exposure may contribute to a lower risk of MS, our study went further, looking at exposure over a person’s life span.“We found that where a person lives and the ages at which they are exposed to the sun’s UV-B rays may play important roles in reducing the risk of MS.“For the study, researchers identified participants from the larger Nurses’ Health Study, including 151 women with MS and 235 women of similar age without MS. Nearly all of the women (98 per cent) were white and 94 per cent said they had fair to medium skin.The participants lived across the United States in a variety of climates and locations.

The study said people could be 55 per cent less likely to develop the condition from a sunny climate
Of those with MS, the average age at onset was 40. All of the women had completed questionnaires about summer, winter and lifetime sun exposure.Researchers divided the women into three groups representing low, moderate and high UV-B ray exposure based on where they lived, specifically looking at latitude, altitude and average cloud cover for each location.Seasonal sun exposure was also analysed, with high summer sun exposure defined as more than 10 hours per week and more than four hours per week in the winter.The researchers found that women who lived in sunnier climates with the highest exposure to UV-B rays had 45 per cent reduced risk of developing MS across all pre-MS onset age groups when compared to those living in areas with the lowest UV-B ray exposure.

Read on: Multiple sclerosis: Growing up in a sunny climate could reduce your risk | Health | Life & Style |

Read on: Multiple sclerosis: Growing up in a sunny climate could reduce your risk | Health | Life & Style |

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