As you become able to feed yourself to 100% food bar in game, you will become "[[Player_status_effect|full]]", which means your food bar is over 84%. Over time, being "full" generates fat reserves on your character, which currently can be only be observed by having a fellow player right click and examine you. It will state how much fat you have, which can be one of the following:
*good reserves of fat
*extremely well nourished
As of 2/13/2009, at 0% food bar you "fast", using up one of your fat reserve levels. This instantly fills your food bar to 100%, and gives a message in your event log. To reverse this loss of fat, stay above 84% food bar for awhile by eating more [[meal]]. (It is known that you must eat *something* to regain fat, not just let the 100% bar sit, but how this works is unconfirmed.)