Last week, I discussed the importance of gut flora in the digestion of food while briefly touching on its role in early immunity, including the development of asthma and eczema – both of which are immune issues that appear to be exacerbated or caused by disrupted gut flora in children. But it goes much further than “just” asthma and eczema. Our gut flora plays a massive role in mediating our entire immune response. Think about this little factoid: the human gastro-intestinal tract houses the bulk of the human immune system, about 70% of it. And foreign gut flora actually aids and abets our innate immune response system by improving the function of our mucosal immune system and providing a physical barrier to invading microbiota. Before I get into that, though, let’s go over what we mean by immune system.

Some time back, I wrote a post discussing the three tiers of […]

Original post by Mark Sisson

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