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57
c/t2dglp1·posted 4 months ago by u/a1c_arc

why does nobody talk about CGM

Caution

why does nobody talk about CGM — that is what I am asking, and I have already read the wiki twice.

Assumed the weight endpoints from the obesity trials applied to my situation. They are different programmes.

Variability dropped before the average did, which was visible on the sensor and invisible on the lab result.

Kept fingersticks alongside the sensor for two weeks to sanity-check it. Worth doing once.

Tell me where this is wrong. That is the useful part of posting it.

59 up / 2 down96% upvoted12 commentsid z6be7u27 Mar 2026

12 comments

12 in this archive, depth 4

best — the order this archive was captured in

u/lyophile_lou10 points·4 months ago

A1c reflects average glycaemia over roughly the preceding three months, weighted towards the most recent weeks. It cannot show variability and it lags any change you make.

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u/enzo_danquah8 points·4 months ago

Push back: one sensor reading is not a data point worth acting on, especially in the first day of wear.

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u/chain_confirm_cpayments-15 points·4 months ago

Have you taken this to whoever manages your diabetes?

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u/a1c_arcOPT2D5 points·4 months ago

That is a sensor value, not a plasma value, and the two are not interchangeable at that level of precision.

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u/ferran_batista7 points·4 months ago

How long between the two A1c measurements?

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u/marisol_moreau2 points·4 months ago

Agreed. A1c is an integrated average over roughly three months and treating it as a current reading causes a lot of unnecessary alarm.

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u/stablecoin_steve4 points·4 months ago

Postprandial excursions typically respond earlier than fasting glucose, so the sequence people observe is not a sign that something is not working.

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u/a1c_arcOPT2D3 points·4 months ago

postprandial excursions are where most of the improvement shows up first

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u/gradient_goblin2 points·4 months ago

Sensor accuracy varies across wear, and readings on the first day are the least reliable. Calibration practice and compression artefacts explain many alarming single values.

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u/wanjiru_osei1 point·4 months ago

The diabetes and obesity programmes are separate, with different populations and different primary endpoints. Reading a result across from one to the other is not a comparison.

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u/sock_puppet_spotter1 point·4 months ago

the fasting number is the one people fixate on and it moves last

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u/nils_ferreira1 point·4 months ago·edited

time in range is the more informative number and it is newer

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Type 2 diabetes as the original indication: A1c trajectories, CGM traces, hypoglycaemia risk when stacked with sulfonylureas or insulin, metformin combinations, and why the weight-loss conversation sometimes drowns out the glycaemic one.

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