How an Obsession With Longevity Impacts Today’s Wellness Enthusiasts

Dr. Jordan Shlain has seen them all.

There’s the spreadsheet patient, who arrives at appointments with neatly organized data tracking everything from heart-rate variability to sleep stages to glucose levels. There’s the protocol refugee, taking 14 supplements, two experimental injectables, and a roster of peptides discovered on Reddit. And then there’s the social-withdrawal case, so committed to a cold-plunge-and-sauna schedule, fasting window, and nine p.m. blackout that…