How Your Immune System Works & How to Improve It | Dr. Max Krummel

Sleep, memory states, and the mosaic self: three overlooked mechanisms that determine how well your immune system actually functions.

With Dr. Max Krummel

"It's kind of guarding yourself. It's regulating how much you metabolize, it's in your heart, it's in almost every organ, and it exists in some ways to help us be who we are." — Dr. Max Krummel

Dr. Max Krummel, on the episode

Andrew Huberman sits down with Dr. Max Krummel, professor of immunology and cancer biology at the University of California, San Francisco, for a wide-ranging conversation about how the immune system actually operates. The popular framing treats immunity like a simple on/off switch: rested equals protected, sleep-deprived equals vulnerable. The actual system is more like a distributed sensory network with roughly 100 billion individual cells, each one measuring proteins and peptides in real time, deciding whether something is in range or out of range. Krummel walks through the developmental arc of immune function from birth through old age, explains why your body becomes an increasingly complex mosaic of mutations over time, and surfaces a set of newer findings about how brain states, sleep architecture, and even recalled memories can directly reset immune status in peripheral tissue.