I have never heard of any one ever being addicted to the foods you mentioned and none of them are known stimulants! But I see having an opinion around here is just cause to be ridiculed! Nothing ever changes around here!Why is questioning something stuck in a rut of information?
I hear about people who use raw dark chocolate with their own recipes that dont sound to bad yet how often will the cravings for your special vice allow you the time to go through all the preparation to make something inedible edible? And will these studies only encourage the chocoholic to grab the first chocolate candy bar cup cake or milk shake the can get their hands !
Studies like this are dollar oriented and careless behavior, if one owns a keyboard one must write something!