And now, we can reveal the secret to the media mogul's incredible weight loss - it's all down to what's on her plate. And there's good news for all the foodies out there - Oprah's daily diet doesn't scrimp on carbs, and she's even allowed a glass of rosé.
Now, that sounds like our kind of diet!
The slimmed-down star, who has lost 25 kilos to date, typically starts her day with a filling but health egg sandwich. Made from one slice of toasted wheat bread, one eighth of an avocado, one over-easy egg and a medium tomato, the yummy meal is just four points on the Weight Watchers scoring system.
Meanwhile, lunch involves a generous portion of pasta with sauteed shrimp anddinner is miso-glazed cod with brown rice and vegetables - washed down with a glass of guilt-free rosé.
'I thought it was too good to be true,' the talk-show star said to PEOPLE of the weight-loss meal plan in the new Freestyle program.
'The fish, beans and corn is my favourite, tacos are now zero points!' Oprah enthused.
For more on Oprah's stunning weight loss, and easy meal plans, see this weeks issue of New Idea - out now!