60%

This has to be ketosis kicking in. I guess I'm about 75% certain.

It's played out in different ways for me in the past. The last time, which was just last January, I felt pretty weird and a little bad for about 12-24 hours I think. Then I started to feel great.

The very first time, when I first tried Atkins, I seemed to enter ketosis suddenly, almost like a light switch, and I went from feeling totally normal to feeling really good. At least that's how I remember it.

When I say "good" I mean I remember feeling:
•no hunger
•elevated energy
•sharpened mind
•positive mindset
(Though this last one could have been a secondary effect of feeling I was accomplishing something. On some level it doesn't matter, I suppose, whether the effect was a direct result of my physical state or a secondary psychological result.)

Anyhow, I'm not feeling great right now. A bit fuzzy-headed and tired. Hope to feel great (see above) by tomorrow.