Immunity gets a boost from a surprising place — breakfast

This episode of The Nature Podcast explores two major scientific stories: the surprising link between breakfast and immune system strength, and the enduring lessons from the 40th anniversary of the Chernobyl disaster. Researchers led by Greg Delkoff at the University of Pittsburgh discovered that T-cells—key immune cells—become significantly more effective at responding to threats after eating, with enhanced energy metabolism, division capacity, and long-term memory formation. This effect, observed in both humans and mice, was tied to chylomicrons (fat-carrying particles in the blood) and occurred within just six hours of eating, regardless of meal composition. The findings suggest that timing and state of nutrition could be critical in immune therapies like CAR T-cell treatments. In the second segment, Alexandra Bell, president of the Bulletin of the Atomic Scientists, reflects on Chernobyl’s legacy and warns that as global interest in nuclear energy grows—driven by AI and climate goals—safety, transparency, and international norms must be prioritized. She highlights risks from warzone attacks on reactors, the dual-use nature of nuclear tech, and the need for stronger global regulations and ethical debates about targeting civil nuclear facilities in conflict.