The longevity economy is often discussed through individual interventions: diagnostics, nutrition, supplements, physical performance, wearables, digital health tools, or clinical prevention. Within this framework, physical performance, nutrition, recovery, sleep, behavioural coaching, biomarker tracking, and preventive health become economic assets as much as personal ones. Nutrition as the control systemIf physical performance is the execution layer of longevity — the part the body does — nutrition is the control system. Metabolic health: The core nodeIf the nutrition system has a single central node, it is metabolic health. For a health innovation audience, this matters because metabolic health is both measurable and modifiable.