Man spends millions to attempt to reverse aging

Bryan Johnson, 45, is using his life as a science experiment to see how long he can live and to reverse signs of aging as he goes. NBC News’ Gadi Schwartz reports. » Subscribe to NBC News: » Watch more NBC video: NBC News Digital is a collection of innovative and powerful news brands that deliver compelling, diverse and engaging news stories. NBC News Digital features , , , Nightly News, Meet the Press, Dateline, and the existing apps and digital extensions of these respective properties. We deliver the best in breaking news, live video coverage, original journalism and segments from your favorite NBC News Shows. Connect with NBC News Online! NBC News App: Breaking News Alerts: Visit : Find NBC News on Facebook: Follow NBC News on Twitter: Get more of NBC News delivered to your inbox: #NBCNews #Aging #ScienceExperiment