Rhonda Patrick considers gut health, including fiber intake and avoiding gut irritants, crucial for regulating the immune system and reducing inflammation.

“For me, I like to think about food as what you're putting in your body not only to activate these pathways or try to keep the pathways from being too active. But also, I like to think about it at the level of the gut because the gut, one, regulates the immune system, big time. I mean that's you've got more immune cells in your gut than you do in any other organ of your body and your gut bacteria, the interaction between your gut bacteria and your gut are also, you know regulating the types of immune cells that you're making, regulatory T cells being put in that. And also because it's the major source of inflammation, and inflammation,even very recently has been identified to be a driver of the aging process. So eating things that are good for your gut like fiber and avoiding things that are going to cause a lot of gut damage.”