Good news, Mrrzy! That thread will be my next stop.

Helen, Thanks! I watched a program by Michael Mosley from years ago that had to do with different forms of fasting. I think he set off the surge in programs that tweak various types of intermittent fasting. (I lost 45 weight that way, but not using anyone's program. I watched my calories, keeping them to ~500 alternating days, regular eating the rest of the time, and got to the gym a lot). The program he hosted was Horizon, and he seems to have a lot of science interests (reminds me of the US host David Pogue, who came perilously close to that Titanic submersible that imploded in one of his programs).

I'm already finding that making myself leave the screen behind not only helps sleep but I'm getting to bed a bit earlier. Better quality of sleep is goal.