Quite a few youtubers say it doesn’t work on bread when they check their sugar levels. Here’s a very short video of one.
https://youtube.com/shorts/ktyPr80YOww?si=GHLCArxHSx2fo2ZE
Works better with rice.
https://youtube.com/shorts/MoYixIKbXoM?si=rSw9tUtbEmfekyzk
I watch this guy all the time. As a diabetic in remission, I find his videos very informative.
THANKS!