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Before you startThe five labs to ask for before you start
PMOS (PCOS) hides behind a handful of markers that a basic weight-loss intake rarely checks. Here is the short list worth asking for — and what each one tells you.
Before you start GLP-1 care for PMOS (PCOS), it is worth knowing what a thorough provider would actually measure. Not because you need to interpret the numbers yourself — that is a clinician's job — but because the labs a provider is willing to run tell you a great deal about whether they see PMOS as a metabolic condition or just a weight problem. Here are five worth asking about, and what each one is really for.
1. Fasting insulin
This is the marker most often skipped and most central to PMOS. Blood sugar can read normal for years while fasting insulin climbs to keep it there. A provider who checks fasting insulin — rather than glucose alone — is looking at the engine, not just the dashboard light. If a program never mentions insulin, that tells you where its attention sits.
2. Hemoglobin A1c
A1c reflects your average blood sugar over roughly three months, which makes it a steadier read than a single fasting glucose. On its own it can miss early insulin resistance, but paired with fasting insulin it helps build a picture of where your metabolism actually is — and gives you a baseline to track as things change.
3. The androgen markers
Total and free testosterone, and often DHEA-S, are the hormones behind the irregular cycles, the acne, and the hair changes many women with PMOS know well. Because excess insulin drives androgen production, these markers are part of the same story — not a separate complaint. A provider who reads them is connecting the metabolic and the hormonal instead of treating them as unrelated.
4. A lipid panel
Insulin resistance often travels with shifts in cholesterol and triglycerides. A lipid panel rounds out the metabolic picture and flags cardiometabolic risk that weight alone would hide. It is standard, inexpensive, and easy to ask for.
5. Thyroid function (TSH)
Thyroid issues can mimic or compound PMOS symptoms — fatigue, weight changes, cycle disruption — so a TSH check helps rule out a separate cause hiding underneath. It is a simple test that keeps a provider from pinning everything on one label too early.
How to use this list
You do not need every marker to start, and a good provider may sequence them. Bring the list, ask which ones they run and why, and notice whether the answer is a thoughtful plan or a shrug. That conversation is often more revealing than any single result.
One honest note to keep alongside all of this: labs guide care, they do not deliver it, and nothing here is medical advice or a substitute for a licensed clinician. What the right labs give you is leverage — the ability to walk into a consult already knowing what good attention looks like, so you can tell whether the person across the screen is offering it.