Tag Archives: mucosa

Vitamin A: The Key to A Tolerant Immune System?

Originally published at ClinicalEducation.org

Vitamin D and Vitamin A are essential co-partners in immunological and bone health.[1],[2] I’m particularly excited about vitamin A because of its profound effects on the gut mucosal immune system—a specialty of mine. Just as vitamin D has attracted attention for its ability to increase antimicrobial peptides and help us defeat pathogens, it’s fascinating to me that vitamin A is also essential for the very tissues that protect us from the same pathogens.

The availability of vitamin A in our food is a key factor in a tolerant, highly functional immune system. To quote from the title of a brilliant commentary in the March 2008 issue of Nature’s Mucosal Immunology, “Vitamin A rewrites the ABCs of oral tolerance.”[3]

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