🍪 CompoundTalk uses cookies to improve your experience, analyze traffic, and personalize content. By continuing to use this site, you agree to our Cookie Policy.
Evidence-based GLP-1 & peptide discussion since 2023
ForumsMetabolic Health & DiabetesFasting insulin levels — need advice

Fasting insulin levels — need advice

JenMemphis Tue, Nov 11, 2025 at 4:15 PM 21 replies 1,428 viewsPage 1 of 5
This thread is more than 6 months old. Information may be outdated. Consider searching for more recent discussions.
JenMemphis
Member
267
1,234
Jan 2025
Memphis, TN
Nov 11, 2025 at 4:15 PM#1

Posting this because the summary going around does not say what the paper says, and the difference matters for how people here are using it.

HbA1c reflects roughly three months of average glycaemia weighted toward the most recent weeks, which is why repeating it at six weeks tells you very little. The improvement on this class comes from two directions — direct glucose-dependent insulin secretion and glucagon suppression, plus the indirect effect of weight loss on insulin sensitivity — and the second continues after the first has plateaued.

Where I think it is weakest: the follow-up is short relative to how long people actually take these drugs, so durability is an assumption here rather than a finding.

So the question, as narrowly as I can put it: why A1C lags the way it does, and what to look at in the meantime if you want to know sooner. If the honest answer is that nobody knows, that is a useful answer and I would rather have it.

Note on sourcing:
Figures above are from the primary publication rather than the press summary. If a number here disagrees with one you have, post yours and we will work out which of us is reading a secondary source.
8 3MikeKY_noInsulin, Dr.RaviCardio, jennifer_SEA and 5 others
Reply Quote Save Share Report
KevinCompounds
VIP Member
5,432
18,234
Dec 2023
Nevada
Nov 11, 2025 at 4:21 PM#2
JenMemphis said:
HbA1c reflects roughly three months of average glycaemia weighted toward the most recent weeks, which is why repeating it at six weeks tells you very…

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.

7 2Dr.RaviCardio, jennifer_SEA, tyler_CSCS and 4 others
Reply Quote Save Share Report
Dr.KarenChen
VIP Member
4,210
24,567
Nov 2023
San Francisco, CA
Nov 11, 2025 at 4:27 PM#3
JenMemphis said:
HbA1c reflects roughly three months of average glycaemia weighted toward the most recent weeks, which is why repeating it at six weeks tells you very…

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.

6 1TomFromTexas, mike.trainer_LA, sarah_nash92 and 3 others
Reply Quote Save Share Report

Sigma-Aldrich — Research-Grade Standards

Certified reference materials, analytical reagents, and research-grade standards for peptide verification. Trusted by laboratories worldwide.

Shop Reference Standards
james_edin
Member
289
1,234
Sep 2024
Edinburgh, UK
Nov 11, 2025 at 4:33 PM#4
Dr.KarenChen said:
Patient selection optimization for glycaemic control: emerging predictive biomarkers for GLP-1 agonist response include: Biomarker Association…

My labs after 9 months on glycaemic control: A1C 5.6%, fasting glucose 81 mg/dL, fasting insulin 4 uIU/mL. My endo says these are "textbook perfect."

For context, my baseline A1C was 7.7% and fasting glucose was 116 mg/dL. The improvement has been dramatic and consistent.

5 0oliver_london, tane_welly, Dr.PathRoch and 2 others
Reply Quote Save Share Report
newstart_MO
New Member
12
45
Feb 2026
Springfield, MO
Nov 11, 2025 at 5:06 PM#5
KevinCompounds said:
PCOS success story with glycaemic control: as someone with polycystic ovary syndrome, this medication has been transformative beyond weight loss.

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

Last edited: Nov 11, 2025 at 11:06 PM
4 24RunnerRach, TrialNerd_Beth, HPLC_Greg and 1 other
Reply Quote Save Share Report
1235

Similar Threads

SUSTAIN-6 to SELECT — the cardiovascular evidence timeline14 replies
GLP-1 and insulin resistance — HOMA-IR improvement data17 replies
Metabolic syndrome reversal criteria — how GLP-1 addresses all 55 replies
A1C target achievement rates — sema vs tirz comparison8 replies
SURPASS-CVOT: tirzepatide cardiovascular outcomes trial design3 replies
ForumsNewTrendingMembersAccount

Log In

Forgot password?
No account? Register