As we get older, aging cells in our colon begin producing their own localized “growth hormone,” and this study reveals how that hormone harms the surrounding healthy tissue. Researchers discovered that this localized hormone acts on both the aging cells and their healthy neighbors, severely disrupting their internal structures and the physical scaffolding that holds the tissue together. This disruption causes the colon cells to behave abnormally, making them more prone to detaching and wandering out of place. Even more concerning, the locally produced hormone prevents nearby cells from properly repairing their DNA, leading to a buildup of genetic damage that increases the risk of normal cells turning cancerous. Ultimately, the study shows that this locally produced hormone creates a toxic environment that actively drives the aging and breakdown of the colon.