Sunshine vitamin diminishes risk of colds, flu | Science News

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Sunshine vitamin diminishes risk of colds, flu

People with asthma and other preexisting lung diseases face an especially exaggerated year-round risk from a deficiency

By
7:08pm, February 23, 2009

Getting plenty of vitamin D — more than diet can offer — appears to provide potent protection against colds, flu and even pneumonia, a new study reports. Although the amount of protection varies by season, the trend is solid: As the amount of vitamin D circulating in blood climbs, risk of upper respiratory tract infections falls.

Though that’s not too surprising (SN: 11/11/06, p. 312), the researchers found one unexpected trend: “In people with preexisting lung disease, such as asthma and chronic

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