That was me that suggested it.Fasted, that's a good number.
With diabetes they say check after 2 hours, but that is for insulin dosage and looking for serious warning signs and 2 hours alone won't give you the whole picture.
If you want an accurate assessment, to see your peaks, you can check every 30 minutes for two to two and a half hours. It's a lot of finger pokes, if you're eating four to five meals a day, but that would be best for a day or two of stable eating. So yeah, in an ideal situation, considering how often you eat, I would test every half hour from the time I got up, until two and a half hours after my last meal, or bedtime, whichever came last.
This is why the CGM is so ideal. You get to see the area under the graph, with all the peaks and valleys. For a full two weeks.
Also, I noticed someone recommended testing somewhere other than your fingertip and I wouldn't recommend that for accurate readings. The strips are calibrated for fingertips. You BG doesn't stay the same, but gets used up as you move through the body farther away from your core, and the strips compensate for that and are calibrated for fingertip. I don't know how much the difference is, but I had the same question when I went to the diabetes clinic, and I asked if I could use my leg because I'm paralyzed and can't feel my legs, so that would be ideal for me. They said no, and explained why.
Also, they mentioned that if I'm doing more than one test in short order, to use different fingertips, as swelling and inflammation in one fingertip may change the readings. And of course they also mentioned at the diabetes clinic to make sure my fingers were reasonably clean of sweats, oils, and of course sugars before doing the poke. I use an alcohol swab.
The good news is that I don't have to poke myself a hundred times a day forever, just a day or two when I'm eating as normal to get a baseline and then after that, whenever I go off your normal diet and "cheat", just to check if I'm safe. Because I'm eating less than 25 grams of carbs on a regular day, I stay around five to seven and a bit, and am always back down to around five and a bit two hours after my one big meal a day.
If I only tested at the recommended two hours I would never have known that my BG goes up to seven and a half around the hour mark.
When you do keto, your body will use proteins and glycerol's to make a few sugars in a process called, Gluconeogenesis.
Sorry for writing so long. I take my diabetes seriously now. It almost killed me when I was seriously food addicted. Two surgeries and almost a year in the hospital.
I ran an experiment and dud finger and knee right after each other, multiple different times and really found no difference, maybe .1 of a difference if any at all.
But I am not diabetic and wasn’t checking becayse my health depended on it.