Carbs

[KennyA]

So what are these for and hope often should I test with these?

Those are ketone test strips. If your machine will do it, you can check for the presence of ketones in blood. I have never used them, although my glucometer is compatible. The ketone strips are (iirc) more expensive than the blood glucose ones.

I've always found that the pee strips are good enough for my T2 purposes: they'll show whether there's none/ a bit / a fair amount / and a lot clearly - I have never been bothered by the exact measurements. Bear in mind that some of the advice about testing for ketones in this thread is from people who are Type 1, not Type 2: DKA is a much greater risk for them. It's possible for T2s to get DKA, but according to the textbooks it's extremely rare.