Benny Blanco swears by it, but does this strategy actually ease next-day aches? We turned to dietitians for some answers. kuppa_rock / Getty Images Aside from being a songwriter and music producer for several Top 40 hits, a successful record executive, and Selena Gomez’s partner, Benny Blanco is now a bestselling cookbook author. In honor of the debut of Open Wide: A Cookbook for Friends, he...