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Message: <blockquote data-quote="CheeseSeaker" data-source="post: 2710843" data-attributes="member: 531814">There are a couple of things worth knowing with CGM.BG 'will mostly' be different from BG (usually 15-20 mins behind as the glucose molecules that are attached to the red blood cells don't migrate through to the interstitial fluid as quickly - hence the delay).The L2 and Dex One don't allow calibration (at the start of a CGM being inserted, there is a thing called 'insertion trauma' where the body reacts to the sensor being injected under the skin, this improves after 2-4 days when the sensor becomes most accurate - the middle bit of its life). Towards the end of its life, the body is healing round the sensor - and this can cause a drop in accuracy. Calibration allows me to off set the readings from a BG test and make them mor accurate (you need software on your phone in addition to the Dex One or L2 standard stuff though.One way to make the CGM more accurate is to insert it 24-48 hours before it's started - not possible with the Dex One though.In tests the Libre 2 and Dexcom One come out very similar for accuracy - thought the One seems to be slightly ahead[URL unfurl="true"]https://www.diabettech.com/cgm/comparing-dexcoms-one-with-libre2/[/URL]We all find some CGMs work better for us than the other - been using L2s for years and know all the hacks to make them work for me. Would be a long journey to get there with the Dex One (though interested to try a parallel run)Wouldn't go back to BG tests (they are needed to calibrate though) - they can't tell me whats going on for a full 24 hour run (and certainly wouldn't let me run an artificial pancreas - thats awesome after 50 years of having to think about what I eat) <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile    :)" loading="lazy" data-shortname=":)" /> hth</blockquote>

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