Join the Dave Asprey Sleep Challenge starting Aug. 17 at https://daveasprey.com/sleepchallenge/In this episode of Bulletproof Radio, my guest is Matthew Walker, Ph.D., author of the international best-selling book, “Why We Sleep: Unlocking the Power of Sleep and Dreams."“We’re in the midst of a “catastrophic sleep-loss epidemic,” he says. With candor like that about a subject I've talked about and written about for years, I had to have him on the show.I was eager to have a discussion about our lack of sleep and examine sleep’s connection to health and brain function. Our conversation covers all that and much, much more. “There is no single system of the body or the brain that isn’t optimally enhanced by sleep when you get it, or detrimentally impaired when you don’t get enough,” Matthew says.As a professor of Neuroscience and Psychology at the University of California, Berkeley, and director of the Center for Human Sleep Science, his research examines the impact of sleep on human health and disease.Don't miss Matthew’s TED Talks on sleep:Sleep is Your Superpower Why Sleep Matters Now More than Ever A Walk Through the Stages of Sleep Matthew has been featured on television and radio outlets, including CBS’s 60 Minutes, the National Geographic Channel, NOVA Science, NPR, and the BBC, as well as in national and international publications, and on numerous podcasts.Enjoy the show! And join the Dave Asprey Sleep Challenge starting Aug. 17.Note: This episode of Bulletproof Radio is a re-release of my interview with Matthew Walker in August 2019, also titled "Sleep is the Boss of You" #616.