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Evidence-based GLP-1 & peptide discussion since 2023
ForumsMetabolic Health & DiabetesHas anyone dealt with fasting insulin levels?

Has anyone dealt with fasting insulin levels?

kim_atl_prep Sun, Aug 4, 2024 at 4:02 PM 14 replies 2,069 viewsPage 1 of 3
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kim_atl_prep
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Aug 2024
Atlanta, GA
Aug 4, 2024 at 4:02 PM#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.

The narrow version of the question is why A1C lags the way it does, and what to look at in the meantime if you want to know sooner.

I have searched first, so if this is covered somewhere point me at it and I will read it.

19 14PeptideSynthNJ, Dr.KarenChen, Dr.NateNeph and 16 others
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COA_Karl
Senior Member
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Jan 2024
Pennsylvania
Aug 4, 2024 at 6:23 PM#2
kim_atl_prep 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.

Patient selection optimization for glycaemic control: emerging predictive biomarkers for GLP-1 agonist response include:

BiomarkerAssociationEvidence Level
Baseline BMIHigher BMI → greater absolute weight lossStrong
Fasting insulinHigher insulin → better responseModerate
GLP1R gene variantsrs6923761 → variable responsePreliminary
Baseline hsCRPHigher CRP → greater CV benefitModerate
Early weight loss (4 wk)≥3% at 4 wks → strong predictor of ≥10% at 68 wksStrong

The 4-week early responder criterion is the most clinically actionable: if you haven't lost ≥3% by week 4 at a therapeutic dose, discuss optimization strategies with your provider.

18 13jim_asheville, matt_MKE, Dr.ReproEndo and 15 others
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MariaRD
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Jun 2024
New Mexico
Aug 4, 2024 at 8:44 PM#3
COA_Karl said:
Patient selection optimization for glycaemic control: emerging predictive biomarkers for GLP-1 agonist response include: Biomarker Association…

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

TestBaselineMonth 3Month 6Month 12
Glucose (fasting)128989282
Insulin (fasting)241285
HOMA-IR4.53.42.01.2
Uric Acid8.16.85.94.9

The insulin resistance improvement (HOMA-IR) is what my endo focuses on most. Going from 4.5 to near 1.0 is a metabolic transformation.

Last edited: Aug 4, 2024 at 9:44 PM
17 12maria_elpaso, anders_CPH, Dr.NutriCornell and 14 others
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carlos_SATX
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Oct 2024
San Antonio, TX
Aug 4, 2024 at 11:05 PM#4
kim_atl_prep 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.

Adding a me-too, because a thread of one person's experience is not much use.

Last edited: Aug 5, 2024 at 1:05 AM
16 11LindaRN_retired, tommy_boulder, hyun_seoul and 13 others
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rachel_ABQ
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Dec 2024
Albuquerque, NM
Aug 5, 2024 at 1:08 PM#5

From the other side of the consultation, briefly.

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 = 5.4 (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.

15 10Dr.CardioMD, EndoResFellow, PharmacoVig_BOS and 12 others
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