Opinion: This California millionaire is peddling eternal life. Why do so many people believe him?

Blueprint, Johnson's wellness program, has gained a cult-like fan base in LA and beyond. — Twitter/@bryan_johnson

For a moment, I fell under the spell of Bryan Johnson.

Bathed in early-morning sunlight, the 46-year-old LA-based tech centimillionaire and longevity celebrity didn't look much younger than his age, although he claims to have the wrinkles of a 10-year-old and organs that are several years younger than his lifespan.