How come that we can live without food for days, but get hungry within a few hours?

Question

How come that we can live without food for days, but get hungry within a few hours?

In: Biology

Answer 1

Hunger is your body’s way to say it can physically take more food, not that you’re going to die if you don’t eat.

In the past, or now if you’re poor, it would be disadvantageous to ever pass up food if you can physically take more because you don’t know when your next meal will be. So you get hungry much more often than you *have* to eat.