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c/t2dglp1·posted 1 year ago by u/rasmus_kimani

[PSA] T2D is not what most of this community thinks it is

Discussion Long Haul ×3 Cold Box ×1

T2D is not what most of this community thinks it is — with the reasoning, because a rule without a reason gets ignored.

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.

Incretin-based agents stimulate insulin secretion in a glucose-dependent manner, which is why hypoglycaemia risk with them alone is low. Risk rises with agents that act independently of glycaemia.

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

I will update this if the picture changes rather than quietly leaving it up.

2,358 up / 261 down90% upvoted65 commentsid w3rhhk11 Feb 2025

65 comments

30 in this archive, depth 4

best — the order this archive was captured in

u/santiago_rasmussen207 points·1 year 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/tired_ledger_notes57 points·1 year ago

Sensor accuracy varies across wear, and readings on the first day are the least reliable.

santiago_rasmussen is right that the fasting number moves last. Knowing that in advance saves months of worry.

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u/chidi_abubakar74 points·1 year ago

a single high reading is not a trend

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u/teodor_duarte39 points·1 year ago

Small fix — insulin secretion in this class is glucose-dependent, which is precisely why the risk you describe comes from the other agent.

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u/sock_puppet_spotter34 points·1 year ago·edited

A1c is a three-month average and it lags everything

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u/bastian_eriksen48 points·1 year ago

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

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u/farid_jansen15 points·1 year ago

check the trial population before quoting a result at somebody

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u/gentle_correctionnice about it12 points·1 year ago

Cosigning that postprandial excursions improve first and the fasting number is the laggard.

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u/cloudy_vial_carol141 points·1 year ago

Agreed on variability. Two people with the same average can have completely different days.

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u/tomas_lokken107 points·1 year ago

Agreed on variability.

Disagreeing with this line: that endpoint is from the obesity programme and does not answer the question.

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u/rasmus_kimaniOP-3 points·1 year ago

How long between the two A1c measurements?

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u/britt_abubakar64 points·1 year ago

Right, and the diabetes programmes report glycaemic endpoints. Quoting an obesity trial result here is answering a different question.

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u/iman_castellanos53 points·1 year ago

Postprandial excursions flattened out first and the fasting number took months to follow. Nobody had told me to expect that order.

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u/sigrid_kaufmann49 points·1 year ago

A1c, CGM, or fingersticks — which are we discussing?

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u/marisol_moreau304 points·1 year ago

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

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u/gentle_correctionnice about it113 points·1 year 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/gentle_correctionMOD66 points·1 year ago·edited

Left up. It distinguishes the sensor data from the lab result, which most posts here do not.

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u/neha_rahimi139 points·1 year ago

the diabetes trials report different endpoints from the obesity ones

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u/gustav_lindholm84 points·1 year ago

the diabetes trials report different endpoints from the obesity ones

Adding the obvious one — bring the export, not the single number, to whoever manages this.

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u/rasmus_kimani56 points·1 year 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/rasmus_kimaniOP0 points·1 year ago

Are you quoting a diabetes trial or an obesity one?

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u/throwaway_918282 points·1 year ago

sensor accuracy varies and the first day of a sensor is the worst

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u/marta_weiss66 points·1 year ago

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

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u/ilias_kaufmann28 points·1 year ago

variability matters as much as the mean

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u/piotr_bruun23 points·1 year ago

nothing here replaces the person managing your diabetes

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u/karim_ramos45 points·1 year 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/chidi_abubakar52 points·1 year ago

Continuous monitoring shows the shape: postprandial excursions, overnight behaviour and time in range. Two people with identical A1c can have very different distributions.

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u/rasmus_kimaniOP0 points·1 year ago

Fasting or postprandial?

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u/ice_pack_auditcold chain0 points·1 year ago

Yes — the person managing your diabetes is the one to talk to, and this board is explicit about that.

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u/runa_grimaldi43 points·1 year ago

Correction: that trial is the diabetes programme and the figure you quoted is its glycaemic endpoint, not a weight result.

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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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