Why some people over eat.

In addition to the gliadin protein in wheat which is an appetite stimulant, most grain foods such as bread, cereal and pasta contain very little nutrition which forces the body to continue to seek adequate nutrition.  A simple solution is to eat nutritionally dense food such as meat, fish, fowl, fruits, vegetables and as much healthy fat as possible which is very satiating.

http://www.wheatbellyblog.com/2012/02/why-do-we-eat-more/