Kale's superfood reign is finally over. For years, many menu items like pizza, smoothies and salads included kale. This year's What's Trending in Nutrition Survey asked the top thirteen-hundred nutrition experts what the next trendy superfood is. They said kale is out. Fermented foods are in. Foods like sauerkrauts, miso and sourdough, now wear the superfood crown and are all the rage due to their healthy-gut benefits.