Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Over-Priced Snake Oil Salesman

I'm a physician. I checked Perricone's peer-reviewed publications in PUBMED. There were only four, the most recent in 1996 which showed a miniscule sun-protection factor of 2.4 for topical glycolic acid. This is a far cry from his exaggerated claims, partial truths, and out-right lies in this book. The five-star reviews titled "Fringe Benefits!" and "The Perricone Prescription" read like shills for Perricone's incredibly high-priced products. Go to his website's store (http://www.nvperriconemd.com/), where he has a 2 ounce bottle of topical Lipoic Acid for $95!! This is typical for his products. Better yet, eat a "Mediterranean diet", skip this book, and ignore his advice on supplements. He's rich enough already.