Although each person is different, in general I think this type of food consumption is not very practical or something that can be sustained for life. and I’ve also seen examples of people who have done one meal a day. A giant meal once a day. And they have successfully lost weight or maintained a lean body mass. not that I’m advocating this. I don’t know if I could actually consume 2000 calories in one sitting. My stomach may not like that. remember, each time we eat our pancreas has to release insulin to deal with the rising blood sugar and the other macronutrients that are being digested. it seems to me that the body is more efficient by eating a substantial amount of food at less frequent intervals.
Personally, when I shed the extra body fat and was in the middle of my daily 16 he fast, I would eat bigger portions less often. 2 meals and a small snack within my 8 hour window.
But I will echo what Dan says. Weight loss will slow as you get closer to your ideal weight. many years ago I was even bigger than when I had started my IF plan. I remember going through a consistent weight loss for 8 weeks, and then going through an 8 week period where I didn’t lose a single pound. Frustrating. Even though I didn’t change anything about my diet the weight remained the same.
And then, magically, for no reason, the weight loss resumed. So, my advice is try not to micromanage the weight loss.
The body is complex and adjusts metabolic rates while at rest in response to other things. The body also tries to maintain homeostasis. We cannot rapidly lose weight for too long, because the body will try to protect itself from what it perceives as an eventual point of becoming too lean. it doesn’t understand that you are trying to lose weight to get to a specific goal size. It only understands that body fat is being lost rapidly and so it will enact countermeasures to try and slow this.
In regards to the chicory tea, it’s macronutrients are so small that drinking it would only induce a very very small insulin response. It’s not enough to break the fast in a significant way. For example, a cup of black coffee can be anywhere between 6 to 8 calories. Most people consider drinking black coffee something that doesn’t break your fast.