Confused about which hormone test actually answers your question? This hormone testing guide breaks down blood, urine, and saliva testing — what each one measures, when to use it, and the right time to test for accurate results.
What Each Test Actually Measures
- Blood (serum) — total circulating hormone at one moment in time. Drawn at a lab.
- Urine (dried, e.g. DUTCH) — hormone metabolites and patterns over a day. Collected at home.
- Saliva — the free/bioavailable hormone your tissues can actually use. Collected at home.
Where to Get It Done
- 🩸 Blood → in-person lab draw
- 💧 Urine → at-home kit, typically self-pay
- 🧪 Saliva → at-home kit, typically self-pay
Use Blood When You Need…
- A confirmed diagnosis: hypothyroid, hyperthyroid, PMOS/PCOS (free + total testosterone)
- A full thyroid panel — thyroid must be blood, no substitute
- To monitor hormone levels once oral or systemic HRT is already underway
- The most validated, allopathic-friendly option
Use Urine (DUTCH) When You Need…
- The full cortisol and melatonin circadian pattern, plus metabolites
- To see how someone metabolizes estrogen or testosterone (protective vs. higher-risk pathways)
- A baseline before starting HRT — helps predict how someone will respond
- Nuance on non-specific, harder-to-pin-down pictures (perimenopause, andropause, PMOS symptoms that don’t match the total testosterone number)
Use Saliva When You Need…
- The bioavailable (free) hormone level — often tracks symptoms better than a blood total
- To monitor topical or pellet HRT — blood can read artificially high/unpredictable with topical absorption; saliva is often the better monitoring tool here
- A simple, affordable multi-point cortisol curve (4-point cortisol is a staple here)
- Something less invasive for patients who want to avoid a blood draw
Quick Marker Cheat Sheet
| Looking at… | Best test |
|---|---|
| Thyroid (TSH, free T3/T4, antibodies) | Blood |
| Circadian cortisol pattern | Urine or saliva |
| Melatonin | Urine or saliva |
| Free/total testosterone (diagnosing PMOS, low T) | Blood |
| Testosterone metabolism (5-alpha reductase activity — acne, hair loss/growth) | Urine |
| Estrogen metabolism pathway | Urine |
| Topical HRT monitoring | Saliva or urine |
| Oral HRT monitoring | Blood or urine |
| Baseline before starting HRT | Urine |
| Bioavailable hormone level | Saliva |
When to Test: A Timing Cheat Sheet
Getting the right test from this hormone testing guide isn’t enough on its own — timing matters too. Testing at the wrong point in a cycle, medication schedule, or time of day can make a normal result look off, or mask something that’s actually going on.
| Who / What | Best Time to Test |
|---|---|
| On thyroid medication | 2–4 hours after taking your dose |
| Cycling women — Progesterone | Day 18–22 of your cycle |
| Cycling women — Estrogen (fertility purposes) | Day 3 of your cycle |
| Cycling women — Estrogen (non-fertility purposes) | Day 3 is ideal; Day 21 is also acceptable |
| Non-cycling women (perimenopause/menopause, no regular cycle) | Track symptoms for 1–2 months to identify your worst window, then test during that window |
| Women on HRT | Test between doses — e.g., the morning after an evening progesterone dose, or 1–2 days after applying an estrogen patch |
| Men — Testosterone | Morning, ideally 7–10 AM — testosterone is highest shortly after waking and declines through the day. A low result should be confirmed with a second morning draw before treatment decisions are made. |
| Men on testosterone therapy | Timing depends on delivery method: injections are typically tested at trough (right before your next dose); topical gels a few hours after application; pellets can generally be tested any time given their steady release |
| Cortisol (blood) | Morning, ideally before 9 AM, to capture the natural peak |
| Cortisol (saliva, multi-point) | Collected at set times through the day — waking, midday, evening, and bedtime — to map the full daily curve, not just one point |
| Fasting labs (glucose, fasting insulin, lipid panel) | Fast for 8–12 hours beforehand — even coffee or a morning snack can skew these results |
We Often Combine Them
In practice, we regularly use more than one sample type on the same patient — blood plus urine, or saliva plus blood — because together they answer more of the picture than any single test does alone. If you’re not sure which test (or combination) makes sense for your symptoms or goals, that’s exactly what a good hormone testing guide — and a conversation with your doctor — can help you sort out.
The Bottom Line
No single test wins across the board — they answer different questions. Blood tells you how much hormone is circulating right now. Urine tells you what your body is doing with it over time. Saliva tells you how much your tissues can actually use. And timing, for all three, can make or break the accuracy of the result. For men and women alike, this hormone testing guide comes down to one thing: the right test, at the right time, for the right question.
Have symptoms that don’t match your last set of labs? That’s usually a sign it’s time for a different kind of test — or a different time to take it — not more of the same one. Schedule a complimentary consultation to talk through what’s right for you.
Related Post: Blood vs Urine Hormone Testing – a detailed look
