Here is a very interesting link to a PowerPoint presentation created by Dean Pomerleau who is a practitioner of a Calorie Restriction who obviously takes a very disciplined approach to his practice.
Dean has stated in media interviews that the psychological benefits that he has experienced with Calorie Restriction, including a pronounced calming effect, are the primary reason why he is committed to this lifestyle.
Psychological Effects of Calorie Restriction
Text version is available here.
