Hailee Steinfeld takes healthy eating very seriously. "I'm not vegan, but I did follow a plant-based diet for a few years when I was having a lot of stomach sensitivities," Steinfeld, 28, wrote in the Friday, July 18, issue of her "Beau Society" newsletter. "I met with a gastroenterologist and did one of those crazy panels, which showed my body was reactive to so many things I was eating." She added, "It's not that the foods were bad, but I think I was overdoing it. So I went plant-based, and it was wonderful.