Asprey singled out Silicon Valley mogul Bryan Johnson — notorious for his extreme, costly anti-aging crusade — as a key ...

That control is starting to fray as Mr. Johnson, a longevity guru known for performing experiments on his body, faces a ...

Bryan Johnson, 47, gathered a huge following on ... Many have been quick to question why a father would want to know such information about his son, with some reacting with shock and disgust.