Good stuff. Do you limit liquids as well? https://twetch.ap…

Yes, only water, black coffee, and tea. Anything that spikes insulin which reaks your fast and starts your timer back at 0

I've been adding butter to the coffee, thinking that wouldn't spike insulin. I will modify and experiment with just black.

Actually I'm not sure if the butter itself spikes insulin (my guess is no since it doesn't contain sugar) but pretty sure that the butter breaks the fast since it contains fat that needs to be digested. Whether that's an issue or not depends on your goals.

Makes sense. Worth experimenting both ways.