Unfortunately for me, lower ketones correlate with slower fat usage when I eat.
Ketones measured are part of a formula with “ketones from food“ and “ketones from body fat” adding and then energy usage subtracting… so it’s hard to tell what’s what. And ketones from body fat may be triggered by some foods for “some people”.
I also don’t feel the energy, clarity or satiety with lower ketones.
Case in point… I indulged today with 17g of carbs and my ketones dropped and glucose rose… I still expect to lose some body fat but I’m hungry again.
It’s ridiculous that I’m more hungry now than I was after fasting for 19 days… but there it is. Hormones are more powerful than logic. They don’t listen to common sense- they follow biology and mine says “there’s carby food somewhere here, dummy! Go get some now!”
Every body is unique in the levels that trigger these effects. I’ve learned mine by collecting massive amounts of data.
Others are clearly luckier than I am. Somewhere in my ancestry, someone survived a multi month fast and lived to pass on whatever genes made that possible. That super survival is now a health hazard (unless we experience that again ).