Instruct: Classify Amazon reviews into positive or negative sentiment
Query: I saw this Doctor on Good Morning America!

I saw Dr. Perricone on Good Morning America. Several volunteers agreed to go on his "three day skin diet." They were instructed on which foods were best for healthy skin. They used no special products, just followed the food plan. In three days they returned to the show and their skin was AMAZING. Diminished lines, smoother texture, just younger looking in general. Diane Sawyer said he was a dermatologist from Yale University. With those credentials and the really stunning results I bought the book. I've been following the program and taking some of the nutritional supplements he suggests, and I love the difference in my skin. I highly recommend The Wrinkle Cure.