Where did you hear the liver converts fat into glucose?
I find my glucose stabilizes around 83-85. Currently, my wife and I just eat lower carb, but with intermittent fasting, my wifes recent blood test (two weeks ago) showed glucose of 83, with a prior one two months ago at 87. She and I both found ourselves at 107-108 five years ago and that made us shift away from high juice/carb use. We were drinking a lot of tart cherry and pomegranate juice for the antioxidants, but despite not tasting sweet, those had a ton of natural sugars.
Here are a few resources on the use of fat as blood sugar:
The Production of Glucose From Protein or Fat
https://www.livestrong.com/article/457948-the-production-of-glucose-from-protein-or-fat/
Does Fat Convert to Glucose in the Body?
https://www.livestrong.com/article/495873-the-conversion-of-fat-to-glucose-in-the-body/
Optimal blood glucose and ketone levels for ketosis
https://optimisingnutrition.com/the-glucose-ketone-relationship/