Hormone Testing 101: Blood Tests vs DUTCH Testing – Which Test Do You Actually Need?
- Lydia Cotter
- 4 days ago
- 6 min read
"My blood tests came back normal... so why do I still feel awful?" It's one of the most common questions I hear in clinic.
Women come to me experiencing severe PMS, PMDD, irregular or long menstrual cycles, infertility, fatigue, anxiety, low libido, brain fog, migraines, or all the hormonal changes that can accompany perimenopause. Many have already had blood tests and have been reassured that "everything looks normal."
So why are they still struggling?
More often than not it's that the wrong test has been used to answer the clinical question.
One of the biggest lightbulb moments my patients have is realising that "having your hormones tested" doesn't always mean we've asked the right questions.
As a Clinical Naturopath, one of the most important conversations I have with my patients is explaining the difference between standard blood hormone testing and functional hormone testing, such as the DUTCH Test (Dried Urine Test for Comprehensive Hormones). While both are incredibly valuable, they provide very different information and are designed to answer different questions.
Whether you're navigating perimenopause, trying to conceive, preparing for IVF, investigating PMOS /PCOS, monitoring menopausal hormone therapy (MHT), or simply trying to understand why you don't feel like yourself, choosing the right hormone test can make all the difference.
💜 Not Sure Which Hormone Test Is Right for You?
Choosing the right hormone test can feel overwhelming. During your consultation, I'll review your symptoms, cycle history, previous pathology, medications and health goals to determine which investigations are most appropriate—so you're not paying for unnecessary testing.
Blood Hormone Testing: A Snapshot of What's Happening Right Now
Blood tests measure the hormones circulating in your bloodstream at the exact moment your sample is collected. Think of them as taking a snapshot of your hormone levels at one point in time.
This information is incredibly valuable and, in many cases, is the most appropriate place to start.
Blood tests are particularly useful for:
Assessing ovarian reserve (AMH)
Measuring FSH, LH and estradiol for fertility investigations
Confirming ovulation using mid-luteal progesterone
Assessing testosterone and other androgens in PMOS (previously called PCOS)
Investigating menopause or premature ovarian insufficiency
Monitoring menopausal hormone therapy (MHT) or prescribed hormone treatments
Assessing thyroid function
Measuring important nutrients that influence hormone health, including iron, ferritin, vitamin D, vitamin B12 and folate
Evaluating inflammation and metabolic health markers
Blood tests are excellent for answering questions like:
Am I ovulating?
What are my hormone levels today?
Is my thyroid contributing to my symptoms?
Am I iron deficient?
Do I have signs of insulin resistance or elevated testosterone?
However, while blood tests tell us how much hormone is present, they don't tell us how your body is using, breaking down or clearing those hormones. I often tell my patients that blood tests are like taking a photograph, while a DUTCH Test is more like watching a short movie. One captures a single moment in time; the other helps us understand what your hormones are doing throughout the day and how your body is processing them.
When Blood Tests Don't Tell the Whole Story
This is where many women become frustrated.
It's entirely possible to have hormone levels within the laboratory reference range and still experience significant hormone-related symptoms.
That's because blood tests generally don't show us:
How you're metabolising oestrogen.
Whether you're producing protective or less favourable oestrogen metabolites.
How efficiently your liver is processing hormones.
Whether you're effectively methylating oestrogen for healthy detoxification.
Your daily cortisol rhythm.
Important progesterone metabolites involved in mood, sleep and nervous system regulation.
Melatonin metabolism and circadian rhythm patterns.
For women with persistent PMS, PMDD, perimenopausal symptoms, unexplained fatigue, anxiety or hormone-related migraines, these pieces of the puzzle can be incredibly important.
💜 Lydia's Clinical Tip
One of the biggest misconceptions I hear is:
"I've already had my hormones tested."
My next question is always:
"Which hormones... and how were they tested?"
The answer often changes everything.
Two women can have identical symptoms but require completely different investigations. One may need simple blood tests to confirm ovulation, while another may benefit from a DUTCH Test to investigate hormone metabolism, cortisol patterns or estrogen detoxification.
That's why I never recommend testing based on symptoms alone. Every recommendation is tailored to your health history, symptoms and goals.
What Is the DUTCH Test?
The Dried Urine Test for Comprehensive Hormones (DUTCH) is a functional hormone test that measures hormone metabolites using several dried urine samples collected throughout the day.
Rather than simply telling us how much hormone is present, it helps us understand how your body is producing, metabolising and eliminating hormones.
It provides valuable insight into:
Oestrogen metabolism pathways
Phase I and Phase II oestrogen detoxification
Progesterone metabolites
Neurosteroids such as allopregnanolone (important for mood and anxiety)
Daily cortisol production and HPA axis function
DHEA and adrenal hormone patterns
Melatonin production
Selected organic acid markers, depending on the test ordered
This gives us a much more functional picture of hormone health.
When I Recommend a DUTCH Test
A DUTCH Test may be appropriate if you're experiencing:
Severe PMS or PMDD
Perimenopause
Hormone-related anxiety
Fatigue or burnout
Hormone-related migraines
Poor sleep
Persistent symptoms despite "normal" blood tests
Suspected oestrogen detoxification or methylation issues
Suspected progesterone insufficiency
Endometriosis or Adenomyosis
PMOS, irregular or painful cycles
Histamine intolerance
Persistent hormone symptoms after weaning or finishing breastfeeding, such as irregular cycles, low libido, mood changes, fatigue or difficulty regulating hormones
A complex hormone presentation that requires a deeper investigation
Monitoring how your body is metabolising certain bioidentical hormone therapies as part of an individualised treatment plan.
💜 Could a DUTCH Test Help You?
Not everyone needs a DUTCH Test.
The most important step is determining which test will provide the answers you're actually looking for. During your consultation, I'll review your symptoms, previous pathology and health history before recommending any testing.
My goal is always to choose the most appropriate and cost-effective investigations for your individual situation.
Blood Tests or DUTCH Testing for Fertility?
This is a question I get asked regularly.
The answer is often both.
If you're trying to conceive, blood tests remain essential for assessing ovarian reserve, ovulation, thyroid function, nutrient deficiencies and reproductive hormones.
A DUTCH Test can then provide additional insight into hormone metabolism, cortisol patterns and progesterone metabolites, particularly if symptoms don't match your blood test results or you've experienced recurrent hormone-related issues.
Each test contributes different pieces of the overall picture.
Why I Often Recommend Both
I don't see these tests as competing with each other.
I see them as complementary.
For example:
A woman with long menstrual cycles may need blood tests to determine whether she's ovulating.
Another woman with severe PMS and "normal" blood tests may benefit from a DUTCH Test to investigate progesterone metabolites, estrogen detoxification and cortisol patterns.
Someone navigating perimenopause may benefit from both blood testing and functional hormone testing to better understand the changes occurring across multiple hormone systems.
Choosing the right test depends entirely on your symptoms, health history and clinical goals.
Hormone Testing Is Only One Piece of the Puzzle
No test should ever be interpreted in isolation.
The most valuable information comes from combining:
Your symptoms
Medical history
Menstrual cycle patterns
Lifestyle and stress
Nutrition
Blood pathology
Functional hormone testing (where appropriate)
This comprehensive approach helps identify the underlying drivers of hormone imbalance rather than simply treating symptoms.
💜 From Lydia's Clinic
One of the biggest mistakes I see is women either:
paying for expensive testing they don't actually need
or
being told everything is "normal" because the wrong test was performed.
Every recommendation I make is based on your symptoms, medical history, previous pathology and health goals, so you only invest in investigations that are likely to change your treatment plan.
The Bottom Line
There isn't one "best" hormone test.
There is only the right test for the right clinical question.
Blood tests tell us how much hormone is circulating.
The DUTCH Test helps us understand how your body is producing, metabolising and clearing those hormones.
When used together, they provide a far more complete understanding of your hormone health than either test alone.mi
If you've been told your hormones are "normal" but you still don't feel like yourself, don't ignore your symptoms. It may simply mean that we need to investigate differently, not that your concerns aren't valid.
Ready to Finally Understand Your Hormones?
If you're experiencing:
✔ PMS or PMDD
✔ Perimenopause
✔ PMOS (PCOS)
✔ Fertility challenges
✔ Hormone-related migraines
✔ Irregular or painful periods
✔ Fatigue or burnout
✔ Symptoms despite "normal" blood tests
I'd love to help.
Together we'll identify what's driving your symptoms, determine which investigations are appropriate, and create a personalised treatment plan that supports your hormones, energy and long-term health.
During your consultation you'll receive:
✓ A comprehensive review of your symptoms and health history
✓ Interpretation of previous pathology
✓ Recommendations for additional testing (only where clinically appropriate)
✓ Personalised nutrition, herbal medicine and supplement recommendations
✓ A clear action plan designed specifically for you
Thank you for explaining the difference Lydia. I never knew there was so much difference or how much extra information you could get from the DUTCH test 😍