You’ll feel the cold much more.

But after some time, the stomach adapts and you don’t really feel that much hunger anymore.

Just can be, that you produce a Gastritis, because the stomach wants to dissolve something and after some time it’s itself.

Also, muscles will be used, after fat, and you lose weight in a not nice way.

It’s (imho) also really hard to get back to regularly eating normal meals.

After a few weeks of stress and not eating much (last week was like 1.5 sandwiches the whole week), I needed quite some time to be able to process a real meal again.
I would eat a few bites, get the sweats and want to puke.

But the was a bit of an extreme case - at least on countries without famine…