What if you could see your inflammation—and your pace of aging—from your kitchen table? We sit down with Bob Messerschmidt, an optical engineer turned Apple platform architect who helped seed Apple Health and the Apple Watch, then left to build a simple at-home device that measures ESR, a century‑old inflammation marker with fresh relevance for longevity. We unpack why chronic inflammation drives heart disease, stroke, neurodegeneration, and metabolic dysfunction, and why a single, trackable...