Part 1: The Rise of the Preventive Health Consumer

A new category of health consumer is emerging: one who tracks sleep and recovery with a wearable; monitors biomarkers through direct-to-consumer testing; and seeks care from functional-medicine providers rather than waiting for symptoms to appear. As these tools and practices move from early adopters into the mainstream, the central question is whether personalized data can translate into durable behavior change, and what it takes to close the gap between tracking and truly improving health. The growth of this market also raises questions for the broader health-care system: How should clinical medicine integrate consumer-generated data? When does a wellness product become a medical one? With employers and insurers increasingly covering preventive services, understanding what actually works and for whom has never been more urgent.