Cortisol Awakening Response (CAR) Testing
The Cortisol Awakening Response (CAR) test is a powerful tool used to assess how your body responds to stress from the moment you wake up. Cortisol, your main stress hormone, follows a natural daily rhythm that should rise sharply within the first 30 to 45 minutes after waking. This rise is essential for helping you feel alert, focused and energised in the morning. When this pattern is disrupted, whether it’s blunted, exaggerated or delayed, it can point to issues with adrenal function or your body’s ability to cope with stress.
At Melbourne Natural Medicine Clinic, we use this non-invasive saliva test to investigate signs of burnout, fatigue, poor stress tolerance and other symptoms that may be linked to an imbalanced stress response.
What Can the CAR Test Help Identify?
This test allows us to assess your cortisol rhythm across key time points. The results can help identify:
- Adrenal fatigue or burnout
- Chronic stress load
- Poor stress tolerance or reactivity
- Mood and cognitive challenges
- Sleep disturbances
- Inflammation or immune dysregulation
- Hormonal imbalances tied to adrenal function
If you feel like you are running on empty or constantly wired yet tired, this test may offer valuable insights into what your body is trying to tell you.
What Is the Testing Process?
The test involves collecting saliva samples at home using four timed collections:
- Immediately upon waking (between 6am–8am)
- 30 minutes after waking
- 60 minutes after waking
- 12pm
- 4pm
- 8pm
These samples are then sent to the laboratory for analysis. Your practitioner will provide clear instructions and support to ensure the process is simple and accurate.
Ready to Understand Your Stress Patterns?
If you wake up feeling exhausted, struggle to manage stress or feel like your body is not keeping up with daily demands, CAR testing could provide the answers you’ve been searching for. Book an appointment with one of our experienced practitioners to explore your adrenal health and take the next step toward balance.
Not Sure Where to Begin?
You don’t need to diagnose yourself – that’s what we’re here for. Book an appointment with one of our experienced naturopaths or practitioners and we’ll help you figure out what’s going on and what you need next.
