Usmagazine.com said Winfrey was inspired to try the diet after reading Kathy Freston's book "Quantum Wellness."

"Wow, wow, wow! I never imagined meatless meals could be so satisfying," Winfrey wrote on her blog. "I had been focused on what I had to give up -- sugar, gluten, alcohol, meat, chicken, fish, eggs, cheese. 'What's left?' I thought. Apparently a lot. I can honestly say every meal was a surprise and a delight, beginning with breakfast -- strawberry rhubarb wheat-free crepes. ...

"This 21-day cleanse gives me a chance to think about (eating) differently and see what my attachments are to certain kinds of foods -- and what I'm willing to do to change," Winfrey added. "Don't know if I'm going to feel better or worse, but I'm willing to try to see if my body at least feels differently."