Biohacker Bryan Johnson spends $2 million and undergoes 60 hyperbaric oxygen sessions in 90 days, reporting a 300 percent surge in blood vessels and 1000 percent jump in akkermansia—his telomeres now test at a 10-year-old’s level, he says.

Johnson’s experiment also shrank his Alzheimer’s risk marker by 28 percent and improved UV skin damage by 10 percent. This longevity crusade, featuring oxygen chambers and erection charts, delivers literal age-defiance—his biology now reads like a child’s science fair winner.

Johnson’s blood vessels reportedly grew 300 percent after 60 oxygen chamber sessions.