Immune Preparation & Support: Vitamin D
Vitamin D boosts the immune system and some studies indicate its supplementation can enhance immune response.
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In one study of 11.3 thousands patients vitamin D supplementation reduced the risk of developing at least one respiratory infection by 12% and the protective effect was strongest in those with low vitamin D levels. .
Remember, according to a 2011 study, 41.6% of adults in the US are deficient. This number goes up to 69.2% in Hispanics and 82.1% in African-Americans.