Symptom-led blood tests: start from how you feel
Four of the most common reasons women get told everything is normal: exhaustion, adult acne, hair shedding and weight that will not shift. Each one has a panel built around it.
Hormonal acne check
Checks whether raised androgens are contributing. A normal result does not rule out a hormonal driver.
Female hair loss check
The treatable blood-test causes that can contribute to hair loss: iron, thyroid and androgens.
Fatigue and energy check
The treatable causes of exhaustion that get missed.
Weight and metabolic check
Insulin resistance, thyroid and metabolic risk, measured rather than assumed.
About this stage
This stage starts from the symptom rather than the life stage. A fatigue check covers iron studies and a full blood count, TSH and free T4, vitamin D, vitamin B12, folate, HbA1c, kidney and liver function and CRP. An acne check looks at testosterone, SHBG, the free androgen index, DHEA-S and the cycle hormones. A hair loss check pairs iron and thyroid with androgens, vitamin D and zinc. A weight and metabolic check measures fasting glucose, HbA1c, lipids, liver function, thyroid, androgens, cortisol and uric acid.
The questions are blunt. Why am I so tired when my bloodwork was fine. What are the red flags for fatigue that mean I should not wait. Why do I have teenage skin at 34. Why is my part getting wider. Why has my weight changed when nothing else has. And underneath all of them, the same one: is there something measurable here, or am I imagining it.
Testing fits by being broad enough to find the common things and specific enough to be useful. Most of the treatable causes of these four symptoms are unglamorous: low iron, an under-active thyroid, low vitamin D or B12, insulin resistance, or raised androgens. They are also easy to miss when only one marker is ordered at a time, months apart. A panel checks the group in one collection so a pattern can be seen.
There is a practical benefit to grouping them as well. Iron, thyroid and vitamin D appear in more than one of these panels, so if you have symptoms in two areas you are rarely paying twice to check the same thing. Your results stay in one account, which means the next set can be compared with this one instead of starting again.
The honest limit is that a normal panel does not mean nothing is wrong. Sleep, stress, perimenopause, coeliac disease, mood and a long list of clinical conditions do not always show up in these markers, and severe or sudden symptoms need a doctor promptly rather than a blood test. What a clear result does is remove the common causes from the list, which is genuinely useful information. Self-pay, not Medicare-rebated.
Always tired? The blood tests that find the common causes
What gets checked first, and why order matters.
Hair loss in women: the blood tests worth doing first
Iron, thyroid and androgens, and what each one explains.
Hormonal acne in women
How to tell, and which hormones a blood test actually checks.
Insulin resistance in women
The signs, the tests that check it, and what HbA1c means.
Ferritin and iron studies explained
Normal ranges, what low iron means, and what to do next.
Thyroid blood tests explained
TSH, free T4, free T3 and antibodies, and how they are read together.
Choose your test
Pick the check that matches the symptom bothering you most. Each test page lists every marker, the preparation, and the price before you order.
A doctor requests it
Upload a request your own GP or specialist has signed, or answer a short questionnaire and have a KnowLuna women's health doctor review it and request the panel.
Collect and understand
Give your sample at an accredited collection centre near you, or choose a home kit or a nurse visit where the test allows it. Plain-English results land in your account, with a doctor to talk them through.
Common questions
Why am I so tired when my bloodwork came back fine?
Often because only part of the picture was measured. A basic screen may not include ferritin, free T4, B12, folate or HbA1c, and ferritin can sit at the low end of normal while still causing symptoms. Sleep, stress, mood and perimenopause also cause genuine fatigue without changing these markers. A broader panel narrows the field.
What are the red flags that mean I should not wait?
See a doctor promptly rather than ordering a test if you have unexplained weight loss, fever or night sweats, breathlessness at rest or on light activity, chest pain, unusual bruising or bleeding, a lump, or fatigue that came on suddenly and is getting worse. Severe or sudden symptoms need assessment, not a queue.
Which check should I choose if I have symptoms in more than one area?
Start with the symptom that bothers you most, since the panels overlap considerably. Iron, thyroid and vitamin D appear in several of them. A KnowLuna doctor reviews your questionnaire before requesting anything and may suggest a different or broader panel if your answers point elsewhere.
Can a blood test explain adult acne or hair shedding?
Sometimes. Raised androgens, low iron and thyroid problems each show up in these panels and each can contribute. Plenty of adult acne and hair shedding has other causes that bloods do not capture, including genetics, skin conditions and a stressful event a few months earlier. Your doctor reads the result alongside what you describe.
Sources and further reading
- Healthdirect: fatigue
- Healthdirect: acne
- Healthdirect: female pattern hair loss
- Pathology Tests Explained (RCPA): ferritin
- Pathology Tests Explained (RCPA): thyroid function tests
General information only, not medical advice. A blood test is one input to a doctor's assessment, not a diagnosis on its own. If your symptoms are severe or sudden, see a doctor promptly. Read our medical disclaimer.
Neither is being told you are fine.