The School of Greatness · 2026-01-19 · 91 min · 16,452 words

70% of Your Immune System Lives in Your Gut | Dr. Will Bulsiewicz

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70% of your immune system is in your gut mining. That gut barrier, that single layer of cells, it protects the immune system. But if it's weak, things can sneak across that are not supposed to be there. Your immune system gets activated and that's chronic low-grade inflammation. You can't have a war without total destruction.

Right. Right? You're destroying everything around when you're activating your immune system to fight an enemy like if you just repaired the gut barrier, the enemy would have never got in in the first place. Board certified gastroenterologist, internationally recognized gut health expert and best-selling author of many books, Dr.

Will Bolsowitz. There's absolutely 100% clear physiology that explains how our stress and our traumas ultimately will impact our gut and when they impact our gut they will impact our immune system and create inflammation. You could be eating all the right things and doing everything you can in your control to eat healthier. But if you haven't healed the trauma of the past, you still might have a weaker gut microbiome, a weaker immune system because of that.

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