Hi there lcarter. I can see after all the about faces you've had with your diabetes, things could be really challenging right now.
Firstly, in terms of fast, I have only done a handful of fasts beyond overnight until late morning, which, from eating the previous evening would equate to around 12-14 hours - depending how lazy we are, in terms of getting up.
My fast is usually broken by tea, with milk, then a while later I'll have a home made a Greek style yoghurt. If I'm away from home, like now, where unsweetened plain yoghurts are more difficult to source, I usually break my fast with a couple of hard boiled eggs and a bit of salad. Here salad means cucumber, tomato and whatever else I see on the market.
Lunchtime, at home, I usually have a gonagerous salad, with plenty mayo, as I need the calories, so mayo amounts are adjusted, depending on what's going on the rest of the day, and what the plan is for our evening meal.
Evening meal will be meat and veggies, or curry or whatever. Where we are now, it'll be curry, or last night I had a ginagerrous fulled omelette and that was it. For me, last nights meal filled me, but I'm certain I was calorie deficient on the day, but one day doesn't matter too much. It's the bigger picture.
When I have fasted, , it hasn't been for weight loss, as I'm very slight already, so I have prepared for those, by ensuring I had lots of nutrition onboard for beginning the fast.
I have generally used fasting to turn off any hunger signals - like on long haul flights where I feel pretty certain the food offerings won't be appealing to me -not necessarily about the carb contents, as the servings can be modest, but more about dietary tastes. One one instance I flew with a Korean airline, where the meal description and the appearance weren't too similar, in my view.
I'm also gluten free, which add to the mix. I didn't trust the meal to be properly GF. I know that's shabby of me, but it was what it was.
I rarely sneak, but when I do, I'll grab some cheese, or cold meat, or pork rinds to crunch on. Yesterday I picked up a pack of spice, crispy chicken skin that I haven't tried, so that'll be a new one for me.
Take it steady lcarter. I know you want those numbers down, but take your time to feel comfortable with it all.
Just the additional context, I have never really tried to achieve ketosis. For me it has always been a bit of a so what. Provided I ham achieving decent test result, and enjoying my food, ketosis isn't important - to me.