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:
*a bit under nourished
*normal build
*well defined