Here is an excerpt of what Dr. Oz said on the Oprah Winfrey Show. This is slide 10 of a 15 page slideshow on Oprah.com:

Other foods that Dr. Oz says can improve vitality are goji berries and mangosteen. He says these foods are ancient healing tools that have strong antioxidants to promote everything from sexuality to longevity.
You can view the entire slideshow at www.oprah.com.