When Emily Gellis hears rumors of people suffering horrible side effects from a trendy diet she springs into action. Armed with over a hundred thousand Instagram followers, Emily launches a social media crusade to expose F-Factor and its founder, Tanya Zuckerbrot. It’s the start of a feud that will attract trolls, lawyers, and, eventually, national media all because of fiber. From Wondery, this is a story about wealth, wellness, and influence hosted by Casey Wilson.

Listen to Fed Up: wondery.fm/2HT_FEDUP