The full diurnal cortisol and melatonin curve
Six saliva samples across the day reveal the natural rise and fall of cortisol and melatonin. The depth no single blood draw can provide.
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The Sleep & Stress Profile is an advanced saliva-based test that assesses the two key hormones involved in sleep regulation and stress response: cortisol and melatonin. By measuring cortisol at multiple points across the day and night alongside melatonin, this profile provides insight into your natural hormone rhythms and how they may be affecting sleep quality, energy levels and stress resilience. Disrupted rhythms are commonly linked to poor sleep, unrefreshing rest and daytime fatigue.
Your results delivered as a complete pathology report, with reference ranges and clinical context for every marker. Easy to read yourself or hand straight to your GP.
The same pathology report format used by hospitals and GPs across Australia.
Every result is shown alongside the normal range. Abnormal results are highlighted in red so you spot them straight away.
Delivered privately within 24-48 hours of testing. Yours to keep, share or print.
See at a glance which markers are healthy and which need attention.
Calculated free testosterone is below the lower reference limit. May be associated with symptoms of low testosterone including fatigue, low libido, and reduced energy.
Six saliva samples across the day reveal the natural rise and fall of cortisol and melatonin. The depth no single blood draw can provide.
Trouble falling asleep, waking at 3 AM, low morning energy, anxious mornings or wired evenings. This panel reveals whether cortisol or melatonin is the cause.
A healthy cortisol curve peaks in the morning and drops by night. A flatlined or inverted curve is the biochemical signature of chronic stress and burnout.
Late melatonin onset, low midnight melatonin or daytime melatonin all explain sleep issues that standard blood tests miss entirely.
Chronic cortisol dysregulation drives accelerated aging, insulin resistance, muscle loss and cognitive decline. One of the most underused longevity markers.
Order online, collect six saliva samples across one day, post back in the pre-paid envelope. No clinic, no appointment, no referral.
Australia's easiest blood test
Step one
Order your blood test
Choose from 200+ blood tests or build your own. Once purchased, you'll get an instant pathology request form delivered to your inbox as a PDF, ready for use.
Instant pathology request formStep two
Walk in to collect your sample
Take your pathology request form to any of our 3,300+ partner collection centres across Australia. No need to book, just walk in and get your sample collected.
3,300+ collection centresStep three
Receive your results
Your results are reviewed by our AHPRA-registered doctors and sent privately to your email or SMS, usually within 24-48 hours.
Results in 24-48 hoursThousands of Aussies trust MediTests to make blood testing fast, easy and stress-free.
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Whether you're tracking symptoms or just want peace of mind, you're in control. Order any test you like, no doctor's approval needed.
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No blood test ever refused. Order any panel without a referral or a reason
200+ blood tests available to order online
Get your results in 24-48 hours
Original lab report from a NATA accredited laboratory
All pricing includes referral, testing and results. No hidden fees.

Everything you need to know before you order.
Order your test online today. No consult or referral required, no waiting room, no hidden fees. Results in 24 to 48 hours.
Hundreds of Australians have skipped the gatekeeping and wait, and taken control of their health with MediTests.
A very positive experience
I booked a blood test because my health insurance did not cover GP consultations. The referral form was emailed to me immediately, I walked into a collection centre the next morning and my results arrived the very next day. One result showed an elevated TSH level and because I was pregnant, a doctor from their Sydney office personally called me to talk it through. It made me feel they genuinely cared.
Could not have been better
I've been in remission from Graves Disease for a few years and suddenly had symptoms again. It was easy to choose and purchase the test I needed at a reasonable price and set up the appointment online for the next day. The lab tech was friendly and put me entirely at ease, and the results were delivered electronically within a day or two. Could not have been better.
These guys are brilliant
Ordered the test, got the referral letter within 20 minutes. Got the test done on a Saturday and had the results by Sunday evening. Seriously efficient and very quick.
Efficient from start to finish
I selected and ordered the tests I wanted online, then dropped into the clinic for the blood draw during my lunch break. The process was quick and efficient, and by lunchtime the following day my results had been emailed directly to me. Fast, convenient and hassle-free.
Brilliant service
Absolutely loved that I got to choose what blood tests I wanted. There is a huge selection and the process was very simple. My results arrived very quickly in my email and I'd definitely use again and recommend to friends and family.
Perfect for a busy family
As a busy working family, we are regular users of MediTests. Excellent, hassle free service for those in between tests or ongoing monitoring. Saves money through less costly doctors visits and time off work where appropriate. Highly recommend.
Great pricing
Great pricing, with easy optional extras by checking a box for more comprehensive tests without having to get a top tier package like other companies offer. Fast, efficient and clear results.
Fantastic service
Excellent, convenient service and so easy to use. Amazingly quick results and a personalised service if needed. I could not fault any part of it.
Great option and perfect service
Easy check out of the test on the website, easy to get the test done and results came quickly. Good to get an idea of any issues as a prep before seeing the GP.
Very simple and easy
It was very simple and easy. I got my results back within a few hours, a lot quicker than I was expecting. There were a lot of locations I could go to for my blood test. Highly recommend.
Very professional and quick
Very professional, very quick, I can't fault anything. I'll be happy to do another one when the time comes.
The ease of the whole experience
The ease of the whole experience, and the quick turnaround with results. Exactly what I was after.
Reliable and no prescription needed
It is a reliable method to get a blood test without the doctor's prescription. The whole thing was easy to organise and I'd happily use it again.
Very efficient and convenient
Very efficient and convenient from start to finish. Exactly the kind of easy, no-fuss service I was hoping for.
The Sleep & Stress Profile is an at-home cortisol and melatonin test that measures the two hormones most central to sleep and stress. Rather than a single reading, it captures these across the day and night, which is what reveals your natural rhythm and where it may be disrupted.
It measures cortisol at multiple points from morning to night, alongside melatonin. Cortisol should follow a daily curve (higher in the morning, lower at night) and melatonin should rise in the evening to support sleep. When these rhythms are out of sync, the result is often poor or unrefreshing sleep, low energy and reduced stress resilience. Mapping the pattern across the day gives far more insight than a one-off measurement.
If you want to see stress hormones alongside a wider hormonal picture, the Essential Hormone Profile includes cortisol in a blood panel. You can also create your own blood test for related markers.
This is an at-home saliva collection kit, not a walk-in blood test. It needs no GP referral and no appointment. Your kit is delivered to you, you collect your samples at the set times at home and return them, and your results follow. For more on sleep and stress, Healthdirect Australia is a useful reference.
Cortisol (Morning, Midday, Midnight):
Cortisol is the body’s primary stress hormone and follows a natural daily rhythm. Levels are typically highest in the morning to support alertness and energy, gradually declining throughout the day and reaching their lowest point at night. Measuring cortisol at multiple times allows assessment of whether this rhythm is balanced or disrupted, which can influence sleep quality, stress tolerance and daytime fatigue.
Melatonin (Morning, Midday, Midnight):
Melatonin is the hormone responsible for regulating the sleep–wake cycle. It normally rises in the evening to promote sleep and remains low during the day. Measuring melatonin at multiple time points helps assess whether production and timing are appropriate, as disruptions can be associated with difficulty falling asleep, poor sleep quality or altered sleep timing.

1. Receive your referral instantly after purchase
2. Quick blood test at your local collection centre
3. Results to your inbox within 1-2 days