I don't have the energy for this argument again (search previous posts about obesity if you'd like to read the whole thing), so I'll just leave this link
http://danceswithfat.wordpress.com/2...their-doctors/
No, she isn't a biologist, biochemist, doctor, or whatever you think will give someone the credentials to be able to say that dieting is ineffective, but if I remember right she is a professional researcher and has done a ton of research about this. Scroll to the bottom of the article if you don't give a #### what she has to say and just want to see the proof.