The 31-year-old"s previous ordeals on the show included eating fried flies, bug burgers, and drinking "crocolate milkshake". The mum-of-three alleged fans were getting back at her over her bitter split with Aussie singer Peter Andre earlier this year.
"I can't do another trial. I'm walking. There's only so much c*** one person can take. The way I've been treated on the show by the viewers, you'd think I was the most hated woman in Britain," The Sun quoted her as telling the producers.
She apparently added: "It is getting beyond a joke. Everyone seems to hate me so much more than I thought. I said at the start that I came on the show for a bit of peace and quiet, to try and get my head together after the divorce. But now I'm feeling uncomfortable."
An ITV source confirmed: "Katie Price has left the show - as of today. We tried to talk her into staying but her mind was made up and she has left immediately."