The ketogenic diet has come to considerable prominence in recent years, thanks in part to growing adoption among celebrities, media personalities, and professional athletes. Keto is currently the diet of choice of Katie Couric, Halle Berry, LeBron James, and Tim Tebow. Alicia Vikander famously used the keto diet to lose weight and gain muscle in preparation for her role in “Tomb Raider,” and three out of five Kardashians agree that keto is the way to go.