Is your liver on right now? You can find out with a drop of blood.
If your ketone levels are around 0.1, your liver is off.
If they are around 1,0, your liver is on.
It's easy to tell, once you've measured.
This is me pricking my finger to test my ketone levels. I got 1.3 mmol. My liver is on!
I was at a gathering of liver surgeons last night and none of them had realized this before: that the liver turns on and off.
Perhaps it's because my background is in computers that I immediately recognized when something goes up 10x, that indicates something has gone from "off" to "on".
It's generally not healthy to keep your major organs in the off state. If you never open your eyes, you go blind.
The liver is the largest organ in your body. It's probably extremely important to keep this thing on.
There's a lot of good places to start learning, but in two words: avoid carbs.