Starvation

Starvation or Hunger, sometimes displayed as FOD, is a derived statistic in Fallout: New Vegas in Hardcore Mode.

Characteristics
is affected by certain consumables and other things. decreases your strength and other stats as it progresses. comes on more slowly than Dehydration. You will die after five days if you do not eat.

Mechanically, it is very similar to radiation (if rads went up constantly).