what happens when one deprives themselves of food?

The body first burns through all fat reserves to maintain muscular and mental functions. It also cannibalizes your skeletal system for the minerals required for your nerves to function. Once the fat runs out your body begins to break down the proteins in your body, this can cause permanent damage to the muscular system. Non vital systems, including the reproductive system, will shut down entirely, and sometimes be damaged. Eventually your body will run out of fuel and the heartbeat will weaken to a point where blood ceases to circulate properly, resulting in death.

They burn all the calories left in the body, feel weak, faint, start hallucinating about food and possibly die.

they become weak... there bones start showing lol... there stomach starts digesting itsself.... then you fall alseep and never wake up lol

They usually die.

You starve and DIE!!!