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Since switching to libre 2 plus, I haven't had a single CGM that has been close to my finger prick tests. My CGMs are consistently showing readings between 1 and 2 mmol lower. It's really annoying when the CGM gives you a false sense of glucose control
Yup, agreed @mariavontrapp
Things that seem to make it wonkier: sunshine, walking more than 2 minutes, being horizontal, * looking * at a packet of biscuits....
I read this recently and it was a good reminder not to rely solely on CGMs
The FreeStyle Libre Flash Glucose Monitoring System allows users to obtain sensor glucose values by scanning with the reader or their mobile phone. We report a case of a 59‐year‐old man with type 1 diabetes mellitus who developed diabetic ...
^ having said that, I've realised that using hand sanitizer to clean my finger for a "proper" test when out and about isn't really working as well as I'd thought - thought to double check at home this afternoon when my libre showed 3.7, and got a 5.3 with hand sanitizer (ha! Libre discrepancy!), then properly washed my hands and got a 3.6.
Face, meet palm...
Libre 2+ was reading 3 units lower than a properly-washed-hands fingerprick this morning; 4 units lower an hour ago, 4.5 units lower just now (on day 8 of wearing). Ridiculous.