Same with me. I stay very close to near 0 carbs a day. But I am also T2DM, so it’s a bit tougher.
Several years ago when I learned about ketones, I was getting between 50 and 100 grams of carbs. Took me three weeks to even get the keto flu. A week after that I began to smell the acetone. Once I could no longer sense it I got test strips and measured it. I stayed in ketosis (I think I did anyway) for about three months. My experiment ended simply because I wanted to eat some pizza. This time it’s permanent. Started 17 Oct 2017, and still going strong.
One of these days I will do an experiment and see what happens if I eat a moderate load of carbs one day. I’ll have it measured very carefully, and will keep a log of how it goes. Maybe I’ll do it on my birthday. Coming up pretty soon.
I did eat at a Chinese buffet last week. I was very careful about choosing high fat as much as possible, trying to avoid carbs where I could. I ate about one whole plate. Everything tasted very sweet. So I’m assuming every thing had some sort of sugar based sauce made for it. So I was careful not to mop up the sauces
. I measured my BG in the restaurant right before eating (was 84). Then again when I got home 30 minutes after finishing, (BG was 117). I measured again an hour later and it was 109. I was very pleased with this. I was very attentive for the hunger feeling to come back. But it never did. All this without taking my metformin for a few weeks.