What percentage of the immune system does the speaker claim is in the gut?

Wendie Trubow, MD, MBA, IFMCPPresident at Five Journeys, Functional Medicine & Wellness Provider, Best Selling Author, Passionate Champion for Health

The Relation Between Your Gut and Immune System

6 Mar 2025 · 1 min

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0:34

YouTube video (speaker Wendie Trubow) explaining the relationship between gut health and the immune system. The speaker states that about 80% of the immune system resides in the gut and uses analogies (police force, fire department) to argue that nutrients — specifically chlorella — provide the materials the immune system needs to function properly.

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80%

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80% of your immune system is in your gut. And so you need to feed your immune system the nutrients that they need so it can defend you. Because your immune system, I tell people, it's sort of like your police force. It identifies invaders, removes them and makes sure that they don't come back. Or think of it as a fire. The fire department, it will protect you when a fire breaks out, but you got to give the fireman a hose with water in it. You've got to give your immune system the equivalent of a hose with water, which is what the chlorella does. It gives your immune system what it needs to go to work for you, and that's all in the chlorella.