OK, I have no idea of what this means, but my ketones measurement at about 9am today was 0.3mmol/L. I had bacon and eggs for breakfast, in coconut oil, at about 7.45am. I'll have to keep reading to figure out whether that's OK or not. It's certainly not 'in ketosis' though.
Yesterday was a bit tough - I had mince and veges for breakfast at about 10am - all good. I didn't eat a lot of it, but it was satisfying. Then I went out for lunch and ordered the steak and egg with salad greens. I was hungry, but lost my appetite when I found a slug crawling across my plate. I stopped eating, and was still a bit hungry but not enough to ask for another meal (that one was free, after that little discovery). From that moment on, I was really hungry. I could have eaten anything by the time I got home, and (unwisely) had about 6 squares of 80% chocolate. Then I had a pork steak, a sausage, and some stewed tomatoes. Then I had a sweet hot cocoa - I put stevia in it, but it also had some sugar in the mixture. By that time I just didn't care. Then I had the last 2 sausages from dinner.
One explanation is that I didn't get enough fat - I'm not so sure about that, as the mince was fatty, and so were the steak and egg (I had probably 2/3 of it before I found the livestock). The other explanation, which I find more likely now I think of it, is that the lunchtime salad dressing was sweetened. If so, that's a pretty dramatic illustration of what an insulin surge can do when you're trying to eat for ketosis. I don't think there were any other variables yesterday.
On the bright side, I had a great sleep, woke before the alarm this morning, and started with a good breakfast. Now it's lunchtime and I find I've forgotten the leftover bacon I had packed to bring to work. Sigh. Fasting again today I guess! I think I'll stop on the way home, though, and get something spectacular for dinner. I'll need it, lol.
Edit: I found this explanation about ketone levels
Fed state: 0.1 mmol/L
Overnight fast: 0.3 mmol/L
Ketogenic diet: 1-3 mmol/L
21 day fast: 10 mmol/L
Uncontrolled diabetes: more than 25 mmol/L
There's the sweet spot I'm aiming for.
Edited again: I understand that consuming sugar can knock me out of deep ketosis for up to 3 days. If that's the case, then that reading wasn't too bad. I probably need to change to testing at a less variable time, though, like first thing in the morning before I eat anything. I imagine that the blood reading is much faster than the urine one.