I think "appetite stimulant" is due to the fact that they don't provide a balanced nutrition. Somehow your body feels this and asks for more in order to fill up

I think "appetite stimulant" is due to the fact that they don't provide a balanced nutrition. Somehow your body feels this and asks for more in order to fill up also on the elements that are almost missing. The problem is that you now have too much of the elements that are already abundant. This is how I fell about most foods that are grown in an intensive way. "Intensive" means they grow using easy to find elements that are not that valuable from a nutritional point of view.