I'm really unsure what you're implying. What's the appetite control method you have in mind?
I can tell you that in my experience most barely-processed foods don't do any better at filling me than most processed foods. And some of the worst candidates for appetite control are nuts. So I hope "less processed food" was supposed to be an effect, not the cause.
Alas, I guess we'll just have to leave that hard problem to the scientists and philosophers.