Are you serious?????????
It's an intereting posit--this literal kind of "starvation" may be the natural and normal state of the human creature. Would make a fascinating study, but there's no profit in studying it for anyone. It simply means that your body is burning its fat stores for fuel. It doesn't mean you're walking around hungry. As a matter of fact, I can always tell when I'm throwing ketones because I don't get hungry.
Atkins' most difficult stage is when you reach your target weight. You're supposed to add back carbs very slowly and carefully until you know exactly how many you can consume without bad effects (weight gain is only the most obvious). One bad effect, IMO, is you get your appetite running overtime again with those increased carbs. Having lived so long without a lot of carbs--you start to like the advantages, and are leery and uncomfortable adding carbs, at least for me.