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Published on September 7, 2016

September 7, 2016

This week are sharing your data with respect to cold and flu prevention. Does a higher vitamin D serum level decrease the likelihood of getting a cold or flu?

In the GrassrootsHealth questionnaire that accompanies each vitamin D test, participants are asked whether they had a cold or flu in the previous 6 months. This graph shows:

  • 33% of D*action participants experienced a cold and 10% experienced a flu during the 6 months before their most recent test.
  • Participants with vitamin D levels ≥ 40 ng/ml reported 41% fewer cases of the flu and 15% fewer colds than participants with levels <20 ng/ml.

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