After being on this pre-op a week and a half, as well as weight dropping daily, I was curious and pulled out my keto sticks (from previous diets) and wow, i was off the charts. It was darker than the darkest sample. I guess that's a good thing.

So once we start eating a healthy normal, do we remain in ketosis until we introduce the dreaded carbs back in?

Once you are in ketosis, you can stay in ketosis post op if you keep your carbs under 50g...

You will push yourself out of ketosis if you go above that or have sugars.... this includes natural sugars.

if you're on an ultra-low carb plan, then yes. But not all

plans are ultra-low carb.

Yes if you stay very low carb. As soon as I got to pureed, my nut required balance that included fruit. I honestly felt better having a more balanced diet. Some carbs help your brain function a bit better.

Every nut is different.

My brain also did better than the "fog" that descended when I was ultra low carb.

We all try to find what works to keep our bodies in losing or maintenance mode. I'm still liking protein shakes... Even after years. They seem to help me not require more food daily than I should have to stay where I like on the scale.