How many days can someone go w/out eating before they pass out?!

How many days can someone go w/out eating before they pass out?

I have a friend who's depressed over a break-up and I can't get her to eat. It's only been two days, but where's the breaking point before I have to shove food in her mouth?

There's a general rule of three when it comes to bodily essentials. Humans can live 3 weeks without food, 3 days without water and 3 minutes without air. This rule varies, of course, depending on particular situations and if she's doesn't start eating her body will start digesting all of it's fat stores. Once those are gone it will start digesting itself, starting with the less essential organs. In most cases (assuming she's in generally good health) she'll be okay for 3 or 4 days without food. She'll sleep more, to conserve energy, when she's awake she'll feel faint and dizzy, she may be disoriented, maybe even nauseated. Right about this time is when she NEEDS to start eating.

Note: She'll be OKAY for 3 or 4 days without food, it's not healthy and it's not adviseable to skip meals for any period of time. The body functions best when it's fueled properly. Hope this helps!