F-Factor diet creator Tanya Zuckerbrot is suing influencer Emily Gellis for allegedly posting “4,500-plus false, defamatory and/or harassing statements” about the dietitian and her company.

Now, Kelly says, she follows the F-factor diet, from the 2006 book by dietitian Tanya Zuckerbrot. "I started after the birth of my first child, Yates. It took off the baby weight right away ...

Casey Wilson talked to PEOPLE about rejecting harmful body standards ahead of Fed Up, the Wondery podcast she hosts about the F-Factor Diet Glenn Garner is a form writer-reporter who worked ...