IgA is an incredibly powerful chemical, one of the primary proteins responsible for healthy immune function and the internal defense system. It’s constantly fighting a barrage of bacteria, viruses, fungi, and other organisms that invade or are already living within the body’s internal environment. It’s so powerful that it’s better than any flu shot or immune system booster you could possibly take; when it’s activated, it’s the primary internal defense system in the human body. When stress levels (and therefore the levels of stress hormones like cortisol) go up, this lowers levels of IgA,
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