“Could we think that sleep could now provide a contribution to this Horvath clock of determining your biological age? . . .I think it probably does.” —Matthew Walker, Ph.D.
“I think once people enter that seventh and eighth decade, if they haven’t done a lot of consistent preparatory work in the decades prior, it’s alarming how quickly things go south.” —Peter Attia
“[Sleep] is like that master volume button on a mixing deck that you see in the studio. You can manipulate each one of those dials, or you can go to the far left and just move that one dial…and all of the other levers seem to move with it.” — Matthew Walker
“In case you haven’t guessed yet, there’s been a lot of drug traffic on the beach. And I’m not talking about Robitussin and No-Doze. I’m talking about the hard stuff, and a lot of it. I’ve been trying to find out who’s behind it. It hasn’t been easy. I don’t shower much.” —Irwin M. Fletcher