On a chilly morning in early January, beneath the blue sky of a new year, a small group of Londoners waited in the lobby of an office clinic to have their bodies read to them like stories.
Neko Health, a Swedish start-up that offers a battery of health tests, had just opened a new location in Covent Garden. Their chief offering, a body scan that costs £299 ($400) has such high demand that prospective patients have been subject to a wait list. Lara Heynold, a 59 year-old who lives north of…

