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Thread: Vitamin D May Prevent Seasonal Flu

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    Default Vitamin D May Prevent Seasonal Flu

    Randomized trial of vitamin D supplementation to prevent seasonal influenza A in schoolchildren.

    http://www.ncbi.nlm.nih.gov/pubmed
    Am J Clin Nutr. 2010 Mar 10. [Epub ahead of print]

    Urashima M, Segawa T, Okazaki M, Kurihara M, Wada Y, Ida H.
    Division of Molecular Epidemiology Jikei University School of Medicine Minato-ku Tokyo Japan.
    BACKGROUND: To our knowledge, no rigorously designed clinical trials have evaluated the relation between vitamin D and physician-diagnosed seasonal influenza. OBJECTIVE: We investigated the effect of vitamin D supplements on the incidence of seasonal influenza A in schoolchildren. DESIGN: From December 2008 through March 2009, we conducted a randomized, double-blind, placebo-controlled trial comparing vitamin D(3) supplements (1200 IU/d) with placebo in schoolchildren. The primary outcome was the incidence of influenza A, diagnosed with influenza antigen testing with a nasopharyngeal swab specimen. RESULTS: Influenza A occurred in 18 of 167 (10.8%) children in the vitamin D(3) group compared with 31 of 167 (18.6%) children in the placebo group [relative risk (RR), 0.58; 95% CI: 0.34, 0.99; P = 0.04]. The reduction in influenza A was more prominent in children who had not been taking other vitamin D supplements (RR: 0.36; 95% CI: 0.17, 0.79; P = 0.006) and who started nursery school after age 3 y (RR: 0.36; 95% CI: 0.17, 0.78; P = 0.005). In children with a previous diagnosis of asthma, asthma attacks as a secondary outcome occurred in 2 children receiving vitamin D(3) compared with 12 children receiving placebo (RR: 0.17; 95% CI: 0.04, 0.73; P = 0.006). CONCLUSION: This study suggests that vitamin D(3) supplementation during the winter may reduce the incidence of influenza A, especially in specific subgroups of schoolchildren. This trial was registered at https://center.umin.ac.jp as UMIN000001373.

    PMID: 20219962 [PubMed - as supplied by publisher]


    http://tinyurl.com/yc2v472

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    Default Re: Vitamin D May Prevent Seasonal Flu

    Here's more proof that it's about the terrain, not the germ. No one with a strong immune system needs a flu vaccine.

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