India, Jan. 29 -- Anti-ageing enthusiast and US millionaire Bryan Johnson has revealed that he has stopped using his son's blood for plasma therapy in his age-reversal endeavours. The tech entrepreneur had recruited his 17-year-old son, Talmage, and his 70-year-old father, Richard, to join him in "the world's first multigenerational plasma exchange."

The controversial procedure included a full liter of his blood being removed from the teen's body and separated into plasma, red blood cells, white blood cells, and platelets. Next, the 47-year-old had his son's plasma infused into his veins.

However, the tech millionaire revealed that he has now upgraded and will no longer inject his son's blood. "I am no longer injecting my son's blood. I...