For information on Dr. Perricone go to www.quackwatch.com
AND, there's the old expression, "something sounds too good to be true, it probably is". Hope does indeed spring eternal, but I think we all know deep down that looking ten years younger in 10 days is impossible.
I work in a bookstore part-time & we have sold a zillion copies of his book. Sometimes it's hard for me to bite my tongue.