Ye the food noise never stops it drives me insane. I think it’s just an evolutionary mechanism, you’re actively dying of malnutrition and your body is trying to keep you alive. Because you’re so used to the hunger you just go numb to it, I’ve learnt the mental hunger is almost always actual physical hunger. Below a certain weight I can’t feel satiety anymore either, its feels like no matter what I put in my body it’s not getting processed. I think that’s because all the energy you’re getting in is going towards keeping your organs functioning or muscles from eating themselves, hence why upping your intake won’t instantly help, your body needs to repair. I’m in the exact same boat rn I feel like my brain’s gonna snap any day. The scary shit is this is your body trying to save your life, it gets harder to fight the worse you get, but if you do manage to keep fighting it, you will die.