Read the criticisms and controversies section of the wikipedia article, it's a widely criticised study (perhaps not as much as Ancel Keys' study but close)
You asked for a study. I gave you one. I guess that any study worth its time has criticisms and some that don't. Evolution is also criticized. I'm not comparing or equating them, just reminding you a criticism doesn't mean something is not right. Now I did read that wiki section and it is pretty short for such a "controversial" study.
First let me just say that my opinion is that I don't think there is anyone on this earth who knows for sure exactly what red meat does to humans and whether it is good or bad. I choose to believe the study for now.
Now I can start rationalizing why, and reputing Denise's reputings. Unfortunately I don't have time for this. I wish I could spend all my time talking about red meat (I don't) but I can't.
As a side note/joke - Denise is 25. I'm 25. I don't recommend anyone take any health advice from 25 year olds :)
http://en.wikipedia.org/wiki/The_China_Study_(book)