TECH CENTIMILLIONAIRE Bryan Johnson, a self-described “rejuvenation athlete,” reportedly spends more than $2 million a year on everything from $25,000 gene-therapy injections to 111 pills per day. (He’s offering his supplement stack for a $333-per-month subscription.)
It’s kind of working. Johnson, 46, is number seven on the Rejuvenation Olympics scoreboard (the top 20 people, out of about 1,750 contestants, with the greatest difference between chronological and biological ages based on DNA methylation, called an epigenetic clock). But others have
