I also want to say thanks for the post! Super informative stuff, especially the 4 hour absorptive phase which I had not considered in my fasting times.
Right now I'm in the middle of a 40 hour fast- I had a late dinner last night and I will have lunch tomorrow afternoon.
I am considering making the 40 hour fast a weekly event, I have been doing weekly 24 hour fasts for about a month with occasional 16/8 fasts during the week. But having one giant weekly fast really appeals to me- Then I can enjoy more (clean) food on other days than I normally would.
The only downside to fasting? It always makes me REALLY cold (just have to wear extra sweaters, scarves and tights under my jeans, and hot tea is a must in the evenings), I have also occasionally had some lower GI symptoms or nausea after breaking a fast. I don't know if that would be influenced by how I choose to break it? I find it's best to just eat slowly at first, let your body adapt.
I find fasting really informative: I get hunger pangs around the times I usually eat but they pass quickly, which just shows how much the experience of hunger is to do with your body being conditioned to maintain homeostasis (in preparation for food) and less to do with actual energy deficits!
But in the end I really love cooking and eating, I'm looking forward to my big lunch tomorrow after class! For now I will just eat away my saddlebags! (Hopefully)