45-year-old CEO swaps blood with father & teen son to get body of an 18-year-old

Bryan Johnson, the 45-year-old tech CEO spending $2 million annually to get an 18-year-old's body, swapped blood with his 70-year-old father and teenage son. Johnson's son provided a litre of his blood, which was separated into different parts. Johnson and his father followed the same process. Johnson received his son's plasma, whereas his plasma was transfused into his father's veins.