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ForumsPharmacology & MechanismsIncretin effect in healthy vs T2DM — need advice

Incretin effect in healthy vs T2DM — need advice

alex_tucson Wed, Mar 26, 2025 at 10:30 AM 13 replies 1,530 viewsPage 1 of 3
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alex_tucson
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Tucson, AZ
Mar 26, 2025 at 10:30 AM#1

A1C went from 7.4 to 5.6 over nine months and my prescriber was more interested in the fasting insulin, which I did not expect.

Because it is glucose-dependent, this class carries a low intrinsic hypoglycaemia risk on its own — the risk arrives when it is combined with insulin or a sulfonylurea, which usually need reducing.

What I am trying to establish is why A1C lags the way it does, and what to look at in the meantime if you want to know sooner.

Happy to be told the question itself is wrong.

2 22emily_PDX, Dr.SleepRoch
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RetaRick_CA
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Mar 26, 2025 at 10:39 AM#2
alex_tucson said:
A1C went from 7.4 to 5.6 over nine months and my prescriber was more interested in the fasting insulin, which I did not expect.

Complete metabolic panel trending on glycaemic control — sharing because comprehensive data helps everyone:

TestBaselineMonth 3Month 6Month 12
Glucose (fasting)1251038987
Insulin (fasting)211797
HOMA-IR5.53.61.71.4
Uric Acid8.36.55.65.1

The insulin resistance improvement (HOMA-IR) is what my endo focuses on most. Going from 5.5 to near 1.0 is a metabolic transformation.

1 21AmyNC_wife
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CarlaRPh_TPA
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Mar 26, 2025 at 10:48 AM#3
RetaRick_CA said:
Complete metabolic panel trending on glycaemic control — sharing because comprehensive data helps everyone: Test Baseline Month 3 Month 6 Month 12…

Insulin sensitivity test (HOMA-IR) on glycaemic control — arguably the most important metabolic marker most people aren't tracking:

HOMA-IR = (fasting insulin × fasting glucose) ÷ 405

My numbers: Baseline HOMA-IR = 5.6 (insulin resistant) → Current = 1.4 (insulin sensitive)

Anything above 2.0 indicates insulin resistance. The goal is below 1.5. GLP-1 agonists address the root metabolic dysfunction, not just the symptoms. This is why they work so much better than calorie restriction alone.

50 20BrianDallas92, labquiet_amy, emily_PDX and 47 others
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MariaRD
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New Mexico
Mar 26, 2025 at 10:57 AM#4
alex_tucson said:
A1C went from 7.4 to 5.6 over nine months and my prescriber was more interested in the fasting insulin, which I did not expect.

Same pattern here, and in the same order. The detail I would add is minor and it is already implied above.

49 19rick_sfbay, maria_elpaso, anders_CPH and 46 others
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Dr.PulmRoch
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Mar 26, 2025 at 11:42 AM#5

From the other side of the consultation, briefly.

PCOS success story with glycaemic control: as someone with polycystic ovary syndrome, this medication has been transformative beyond weight loss.

After 12 months: periods became regular for the first time in ever, testosterone levels normalized, acne cleared significantly, and — unexpectedly — my hormonal symptoms have almost completely resolved.

GLP-1 agonists address the insulin resistance at the root of PCOS. For PCOS patients, this isn't "just" a weight loss drug — it's treating our underlying metabolic dysfunction.

48 18KristenIndy, MarkLI_maint, Dr.PeteFamMed and 45 others
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