Study in Rapidly-Aging Fish Reveals How Immune System Drives Inflammation and DNA Damage

We often think of the immune system as a victim of aging, simply wearing out over time. This research flips that idea, positioning the immune system as a key culprit that actively drives the aging process. By using the killifish model, scientists can watch these mechanisms unfold in a matter of months instead of decades. The study's key insight is that inflammation and DNA damage are not just happening *to* the immune system, but are being generated *by* it. This is important because it suggests that interventions targeting immune health could have a broad anti-aging effect, potentially slowing down multiple aspects of age-related decline at once. It points toward a future where maintaining a 'youthful' immune system is a central strategy for extending healthspan.