Oprah Winfrey opened up about her career regrets, including her decision to join the "diet culture."

Recently, the daytime TV icon hosted a WeightWatchers event titled "Making The Shift": during the event, Winfrey told the audience that she was "done" with diet culture and the shame it perpetuates.

"Many of us have internalized the diet culture and the standards of the body that have caused us so much shame," Winfrey said. 'We have been criticized. We have been criticized. We have been shamed and told that unless we meet a certain standard size, we do not deserve to be accepted or loved. And what I know for sure is that I am sick of it."

Winfrey went on to say that the purpose of the event is to help people free themselves from the scrutiny and pressure of unrealistic beauty standards and to encourage them to "stop judging others by the way they choose to live."

And she admitted that one of her "biggest regrets" is that she perpetuated such judgment, stigma, and shame as a former TV host.

"I would also like to acknowledge that I have been a steadfast participant in this diet culture through my platform, through magazines, through 25 years of talk shows, through online," she told the crowd. 'I have contributed greatly to this culture. I can't tell you how many weight loss shows and makeovers I've done, and they have been a staple since I've worked in television." The entertainment powerhouse went on to say that she has been candid in the past about the fact that her infamous "fat wagon moment" on her Oprah show "is one of my biggest regrets."

In that corner, Winfrey carried out a literal "wagon full of fat" to represent how much weight she had lost.

In an on-camera interview over a decade ago, Winfrey mentioned that moment and the extreme lengths she went to lose over 60 pounds on air.

"There's a place here [in Chicago] called Moe & Oink," she said at the time. 'So [I said]: let's go to Moe & Oink's and see what 67 pounds of Moe & Oink's fat looks like.' So I did it [because] at the time I had been starving for four months, literally four and a half months, and I felt it was important to show it in that way. At the time, Winfrey told the studio audience that he ate "absolutely nothing" for six weeks before finally "cheating" on his diet, which he described as a "controlled cheat."

"Whatever diet you choose... If you can do it with the help of your family doctor, and if you believe in yourself and believe that this is the most important thing in your life... I want you to know that you can overcome this," she continued.

"Starving myself on a liquid diet sent a message that I or anyone else could not protect and set a standard for those watching.

"Because I own what I did and I want to do better now, I now know that that 'fat wagon' moment was set in motion years and years later, thinking my struggle with weight was my fault," she continued. And it took me until last week to process the embarrassment I personally felt at having my yo-yo dieting moment become a national joke."