First off, the Avatar is a junkie. He's addicted to two main substances, 'Food' and potions. Food is probably the most dangerous, since the Avatar is totally unable to kick the habit and withdrawal will kill him. Worse yet, the other party members will ... also become Food users simply by virtue of being in close proximity to the Avatar.
— IT-HE Software, Ultima V - Lazarus page
Gnawing hunger sets in, turning the body against itself, weakening the mind…
To fall for such a little thing... a bite of bread...
The requirements of survival cannot be met on an empty stomach.
—The Ancestor, Darkest Dungeon, on failing to feed your adventuring party