Here we are again, lecturing people on weight loss as if every human on the planet has exactly the same metabolism, instead of having different metabolic genes, different lines of mitrochondrial DNA, and our metabolism being moderated and modulated by single celled organisms that outnumber our own cells.
We don't have it figured out, and we're not going to figure it out by looking at hundreds of people and copycatting them. This is going to take double genetic testing for participant selection. One for the participant, one for a stool sample.
What gives me an appetite is weight lifting. I honestly don't get how people can't be hungry after lifting heavy. Could be psychological for me because I am also intent on building muscle, but still. My hunger after lifting is more visceral than my usual "gotta eat" feeling.
When it comes to human health, every subject is like that.
This is why we rely on randomized control groups, peer-review, and other mechanisms to reduce the chances of making wrong assumptions.