Logging in enough deep, refreshing slumber boosts your mood and recharges your batteries, and it makes your RealAge at least three years younger. And now there’s a whole roster of newly discovered benefits that may make you even younger, happier and smarter.

The You Docs — Mehmet Oz, host of “The Dr. Oz Show” and Mike Roizen of Cleveland Clinic — are authors of “YOU: Losing Weight.” To submit questions, go to www.RealAge.com. A King Features syndicate.