When you're scrolling through social media, how can you tell what's real?

Misinformation can be dangerous, especially when it's related to your health.

Anything can be posted online without being fact-checked.

Tanya Zuckerbrot, founder of the trendy high-fiber F-factor diet, has celebrity followers,

including Megan Kelly and Supermodel Olivia Coppo.

Tanya has a nice house, nice husband, nice vacations, a very aspirational lifestyle.

But allegations of troubling side effects with the diet began to surface and people started to question,

is she selling powder or power? Emily Gellis, a popular fashion influencer, saw these allegations

and put the diet on blast to her own large social following. She launched a crusade to expose

Tanya and the F-factor diet. Emily thought bringing awareness to the claims would be enough,

but that was just the beginning. What was once an online feud escalated into the real world

resulting in threats, lawsuits, and a whole lot of drama.

Okay, you're about to hear a preview of Fed Up. Listen to Fed Up on Apple podcasts,

Amazon Music, Spotify, or you can listen early and ad-free by joining Wondery Plus in the Wondery app.

Ah, Summer in Manhattan. There is nothing quite like it.

And on this August day in 2018, it's the usual 1400 degrees and the rats are living their best lives.

The sidewalk outside Chippuriani downtown is packed with people having a good time,

hanging out, enjoying $30 salads. A waiter brings out a piece of cake with a candle on it and

delivers it to one of the tables. My friends like sends over the cake with the candle,

like they're pretty like white meringue cake that they're like kind of famous for.

That's the almost birthday girl herself, Emily Gellis. And before I go to blow out the candle,

I say something like, oh, I need to get an Instagram for this. Like, I need to like record this,

...