A triple treatment of DHEA, metformin, and growth hormone rebuilt the thymus and reversed biological age by two and a half years in a study.

“Greg Fahy, who's got a company out on California, worked with UCLA researchers, in fact, the guy that co-invented the clock, Steve Horvath. They published last year that a triple treatment of chemicals. I'll name them, DHEA, metformin, and growth hormone. It rebuilt the thymus, which is something that happens to all of us. It gets smaller. But more importantly, they measured the blood biological clock, to figure out what happened to their age. And they got younger by two and a half years.”