2020/03/12-13 17 hour fast
Fasted from 16:15 - 09:15. Went to bed at 00:15 and got up at 08:00.
03/12 15:45 - 16:15 Secondary meal
03/13 09:15 - 10:15 Keto coffee
This was an interesting experience. My eating was disrupted due to my work schedule (11:30 - 20:00) which did not give me time for a second meal before work and got me home too late for another meal then. So I decided to start the fast as of the end of my meal at work, which I finished about 16:15. You can see from the plot that my glucose rose from 4.6 -> 5.4 after the meal. Then from 17:30 or 18:00 fell slowly at first but steadily until 07:00.
From about 03:00 I was awake as much or more than asleep something noted by @Chantarella here and I commented upon elsewhere here with a link to a relevant article in Scientific American Blog.
By about 06:30 I was fully awake, but still in bed trying to pretend I was sleeping. Glucose was still very low, even though on previous days it had already started to rise by around 06:00 or so. I was curious about my ketones and at 07:00 I got up for about 10 minutes to check. I blew 19.3 ppm on my Ketonix. That’s somewhat above normal for early morning. When I was measuring BrAce daily my morning measurements were generally in the range of 5 - 10 ppm. Seldom above 10. So I presume I was solidly ketogenic all night, which might account for my wakefulness.
As you can see from the plot, when I got up at 07:00 to check BrAce my glucose went up from 3.1 to 3.5, but then went down again to 3.1 by 07:30 before starting to go up again by 08:00. At that point I could not longer pretend I was sleeping to fool gluconeogenesis , so I got up, and glucose went up with me.