Bryan Johnson, a tech mogul on a mission to look as young as possible, is at the center of Netflix's upcoming Don't Die: The Man Who Wants to Live Forever doc. In the trailer, he admits to taking 54 pills a day, undergoing light therapy and plasma exchanges, among other treatments, to reverse aging. While his son admits he's "worried" about his father, Johnson says, "I really want to have multiple lifetimes with my son, 100 years is not going to be enough." The footage also includes others calling him both a "grifter" and one of those "rich, Silicon Valley types chasing the fountain of youth." The doc drops January 1 on Netflix.