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.

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

including Megan Kelly and Supermodel Olivia Culpo. Tanya has a nice house, nice husband,

nice vacations, a very aspirational life. But allegations of troubling side effects with the diet

began to surface and people started to question, is she selling powder or power?

Emily Gaias, 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. You're about to hear a preview of FedUp. Listen to FedUp on Apple

Podcasts, Amazon Music, Spotify, or you can listen early and add 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 1,400 degrees and the rats are living their best lives.

The sidewalk outside Chipprianne 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

candles, 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,

like Influencer Life. Influencer Life. At the sound of those two words,

...