At 4 weeks post-op, I came down with a bad flu bug for a week, I didn't eat from last Monday to Monday 2 days ago, (which puts me at 5 weeks post-op now) and when I started feeling better Monday afternoon I made and ate some tuna noodle casserole, thinking it would be easy on my belly to start eating again. Ever since I have felt like I'm completely starving again like when I first come home from the hospital when I got the sleeve done. So I've been doing some reading and I think I stopped my ketosis by eating those darn noodles. So now I'm trying to figure out how long does the average person stay in ketosis after the surgery, so I can see if I need to work on putting my body back in that that state or not. I know as I am right now, I feel like I'm starving about 2 hours after eating, and I can't continue on like this. All I want to do is EAT. I didn't even feel like this BEFORE the surgery!!

I don't know if you knocked yourself out of ketosis per se, but you are probably on the right path blaming the noodles. Carbs will stimulate hunger every time and you probably were just getting your body used to low carbs when you re-introduced them to your diet, thus starting over from scratch.

I would talk with your doctor/surgeon about the issue and see if they have any recommendations. I am certainly no dietitian, but it seems the more Protein I eat, the less I think about or am hungry for food. This of course only started happening after 3 weeks of carb withdrawal.

Ketosis is not needed for weight loss. It's good in the pre-op diet phase and can jump-start weight loss and help end carb addiction. It's just that you don't need to be in ketosis in order to lose weight. It might be head hunger.

Our nutritionist doesn't allow ketosis at any stage of this process - are you following the guidelines that were provided to you?

Try more protein shakes 30g see if that can calm the hunger down ?

My NUT was ok with Ketosis.
Although some may tell you to wait maybe a year.
I get hungry around 2 hours after eating in the arvos and I have no idea why.