In this episode of Talk Nerdy, Cara is joined once again by science writer Dr. Emily Willingham to talk about her newest book, "The Tailored Brain: From Ketamine, to Keto, to Companionship, A User's Guide to Feeling Better and Thinking Stronger." They discuss how our cognitive needs are not one-size-fits-all while applying much-needed skepticism to the gimmicks and tricks often offered by the self-help industry. Follow Emily: @ejwillingham.