A well-known eccentric tech mogul with a zeal for looking younger has taken the drastic step of swapping blood plasma with his father and young son.
Bryan Johnson is a world-famous biohacker who has become notorious for spending millions of dollars every year on a cadre of doctors and medical procedures that purport to carry the fountain of youth.
Mr Johnson, who has received blood transfusions from a healthy, anonymous donor in the past, has now accepted plasma donation from his 70-year-old father Richard and 17-year-old son Talmage.