Advanced Adrenal Stress Test
The Advanced Adrenal Stress Test measures diurnal salivary cortisol at five timepoints (awakening, post-waking, midday, evening, bedtime) plus DHEA and the cortisol:DHEA ratio, mapping HPA-axis circadian regulation and stress responsiveness.
7
Biomarkers
Saliva
Sample
7–10 business days
Turnaround
No
Fasting
What is the Adrenal Stress Profile test?
The Advanced Adrenal Stress Test maps the diurnal cortisol curve and DHEA through multiple timed saliva samples collected at home, offering a functional snapshot of hypothalamic–pituitary–adrenal axis regulation and circadian rhythm integrity. It is ordered by practitioners in integrative, functional, and naturopathic settings to investigate symptoms attributed to chronic stress, 'adrenal fatigue,' disrupted sleep, and burnout — conditions that do not meet the threshold for classical adrenal insufficiency or Cushing syndrome but are thought to reflect subclinical HPA-axis dysregulation. Because saliva captures free cortisol and can be collected non-invasively across the day, this test is well suited to outpatient stress assessment. Results inform personalised interventions — lifestyle modification, adaptogenic botanicals, phosphatidylserine, DHEA supplementation, and circadian re-entrainment strategies — rather than pharmacological hormone replacement. Practitioners interpret the pattern (blunted awakening response, elevated evening cortisol, flat diurnal slope, low DHEA, elevated cortisol:DHEA ratio) more than isolated values, recognising that HPA dynamics are context-dependent and that the test is exploratory rather than diagnostic for endocrine disease.
What does the Adrenal Stress Profile test measure?
Cortisol at awakening represents the nadir of the diurnal cycle. The adrenal cortex secretes cortisol under pituitary ACTH control with a strong circadian rhythm — levels are lowest during sleep and rise sharply in the first 30–45 minutes after waking (the cortisol awakening response), peak in mid-morning, then decline through the afternoon and evening. Salivary cortisol correlates with free (unbound) plasma cortisol, the biologically active fraction.
The awakening sample establishes the baseline from which the cortisol awakening response is measured. Blunted awakening cortisol may reflect exhaustion or suppression; markedly elevated awakening cortisol can signal chronic stress activation or endogenous hypercortisolism, though salivary ranges differ from plasma and single timepoints require cautious interpretation.
The cortisol awakening response is the rapid rise in cortisol 30–45 minutes after waking, typically an increase of 50–160% above the awakening value. It is thought to mobilise energy and cognitive resources for the day and is modulated by anticipatory stress, sleep quality, and HPA-axis reactivity.
A blunted or absent rise may suggest HPA-axis hyporesponsiveness, chronic exhaustion, or altered circadian regulation; an exaggerated rise can reflect heightened anticipatory stress or anxiety. The CAR is variable between individuals and sensitive to collection-timing precision, so interpretation requires attention to protocol adherence.
By midday cortisol has begun its diurnal descent from the morning peak. The rate and pattern of decline reflect the robustness of circadian regulation and the prevailing balance of HPA-axis activation and feedback inhibition.
A midday sample tracks the slope of the diurnal curve. Persistently elevated midday cortisol may indicate chronic stress or poor circadian rhythm; midday levels that remain high or fail to decline appropriately are a feature of some stress-related and mood disorders.
Evening cortisol represents the final phase of the diurnal decline, falling to a nadir that permits sleep onset and nocturnal recovery. Suprachiasmatic nucleus signalling and negative feedback from circulating glucocorticoids govern this decline.
Elevated evening cortisol disrupts sleep initiation and quality and is a hallmark of chronic psychological stress and Cushing syndrome (where late-night salivary cortisol is a validated screening test). Low evening cortisol may be seen in advanced HPA-axis exhaustion, though true adrenal insufficiency requires plasma or stimulation testing.
The bedtime sample captures the circadian nadir. Cortisol should be at its lowest to permit restorative sleep and nocturnal anabolic processes.
Elevated bedtime cortisol is strongly associated with insomnia, heightened nocturnal sympathetic tone, and disrupted sleep architecture. In the evaluation of Cushing syndrome, late-night salivary cortisol is a sensitive screening tool. Persistently low bedtime cortisol is less well characterised but may reflect profound HPA-axis downregulation.
Dehydroepiandrosterone is the principal C19 steroid secreted by the zona reticularis of the adrenal cortex and a precursor for peripheral androgen and oestrogen synthesis. DHEA (and its sulphated form DHEAS in serum) peak in early adulthood and decline progressively with age. Salivary DHEA reflects free, unconjugated hormone.
DHEA is often framed as a counterbalance to cortisol — it has anabolic, neuroprotective, and immune-supporting properties. A low DHEA relative to cortisol is interpreted in functional practice as a sign of adrenal reserve depletion, though the cortisol:DHEA ratio is not standardised in conventional endocrinology. DHEA supplementation is common in integrative settings; monitoring levels guides dosing.
This derived metric expresses the balance between catabolic glucocorticoid and anabolic androgen precursor activity. It is not a single-timepoint calculation — commonly the sum or average of cortisol timepoints is divided by DHEA — and the formula varies between laboratories.
An elevated cortisol:DHEA ratio is interpreted as a signature of chronic stress with relative adrenal androgen insufficiency. The ratio is used in functional and integrative practice to guide adaptogen or DHEA supplementation; it is not a validated diagnostic marker in conventional endocrinology and should not be used to diagnose or exclude adrenal insufficiency or Cushing syndrome.
Why is the Adrenal Stress Profile test ordered?
- Evaluation of unexplained chronic fatigue, poor stamina, and difficulty recovering from stress in the absence of primary adrenal or pituitary disease
- Investigation of insomnia, frequent night waking, or difficulty initiating sleep where elevated evening cortisol is suspected
- Assessment of burnout, exhaustion, or mood disturbance in high-stress professionals, caregivers, or post-traumatic presentations
- Monitoring of circadian rhythm disturbances in shift workers, frequent travellers across time zones, or those with delayed sleep-phase patterns
- Functional work-up of low libido, exercise intolerance, or poor muscle recovery where androgen precursor insufficiency is considered
- Guidance of adaptogen, phosphatidylserine, or DHEA supplementation in integrative stress-management protocols
- Personalised stress-resilience and longevity programmes where HPA-axis optimisation is a stated goal
- Exploratory assessment in patients with fibromyalgia, chronic pain syndromes, or post-viral fatigue where HPA involvement is hypothesised
Sample collection and turnaround
Sample type
Saliva
Fasting required
No
Collection method
At-home collection kit
Turnaround
7–10 business days
Collection notes
Patients collect saliva at five timed intervals: immediately upon waking (before rising), 30 minutes post-waking, midday, late afternoon or early evening, and immediately before bed. Each sample is collected by passive drool or absorbent swab (depending on kit design) into a provided tube. Detailed written instructions specify avoiding food, drink (except water), toothbrushing, and smoking for at least 30 minutes before each sample. Samples are refrigerated at home and returned by courier or postal service with a cold pack. Adherence to timing and the absence of oral contamination are critical to result validity.
Specimen requirements
Minimum volume per sample typically 0.5–1 mL passive drool or swab saturation. Samples must be refrigerated promptly and shipped cold. Avoid collection during active gingival bleeding or within 24 hours of dental work. Note any deviations from the timed protocol on the collection log.
What can affect Adrenal Stress Profile results?
The cortisol awakening response is highly sensitive to the exact timing of waking and sampling; delays, early collection, or non-adherence to the timed protocol introduce error that can mimic or mask dysregulation. Clear written instructions and compliance verification are essential.
Acute sleep restriction, rotating shifts, and jet lag disrupt the HPA axis and flatten the diurnal curve; results reflect the perturbation rather than stable trait characteristics, so timing the test during a period of stable routine improves interpretability.
Intercurrent illness and acute psychological stress activate the HPA axis, raising cortisol across the day. Testing during an acute stressor yields a state-dependent snapshot that may not represent the patient's usual pattern; defer testing until recovery when possible.
Systemic or high-potency topical glucocorticoids suppress endogenous cortisol production; oestrogen-containing contraceptives raise cortisol-binding globulin, altering total but not free cortisol, though salivary free cortisol is less affected. Inhaled and topical steroids should be reviewed; systemic steroids preclude meaningful testing.
Gingival bleeding, recent dental work, or recent eating can contaminate the saliva sample with blood or food particles, spuriously raising cortisol and invalidating the result. Patients should rinse the mouth, avoid food for 30 minutes before each sample, and not collect during active oral bleeding.
Glycyrrhizin inhibits 11β-hydroxysteroid dehydrogenase type 2, prolonging cortisol half-life and raising measured levels; advise discontinuation of licorice supplements for at least one week before testing if clinically feasible.
What do Adrenal Stress Profile results mean?
Elevated
Elevated cortisol at multiple timepoints — especially evening and bedtime — suggests chronic HPA-axis activation, psychological stress, anxiety, or, if marked and without diurnal variation, possible Cushing syndrome (which requires formal endocrine evaluation with plasma and urine free cortisol, dexamethasone suppression, and imaging). An exaggerated cortisol awakening response may reflect heightened anticipatory stress or anxiety. Elevated cortisol:DHEA ratio is interpreted in functional practice as cortisol predominance with relative androgen-precursor insufficiency.
Normal
A preserved diurnal rhythm with appropriate awakening response, midday and evening decline, low bedtime cortisol, and age-appropriate DHEA suggests intact HPA-axis regulation and circadian function. It does not exclude significant psychological stress or other causes of the presenting symptoms, which should be explored through history and complementary assessments.
Reduced
Blunted or absent cortisol awakening response, low overall cortisol production, and a flat diurnal curve are interpreted as markers of HPA-axis hyporesponsiveness or 'adrenal exhaustion' in functional frameworks. These patterns do not meet criteria for primary or secondary adrenal insufficiency — which requires an ACTH stimulation test and plasma cortisol — and are considered subclinical. Low DHEA for age and sex may prompt consideration of supplementation in integrative settings.
Note: This test is a functional tool, not a diagnostic test for adrenal insufficiency or Cushing syndrome. Results are highly dependent on collection-timing adherence, and reference intervals are laboratory- and method-specific. The cortisol:DHEA ratio is not standardised in conventional endocrinology. Practitioners should not diagnose adrenal insufficiency on the basis of this test alone; suspected insufficiency requires plasma cortisol and ACTH stimulation testing. Patterns are interpreted in the context of symptoms, lifestyle, and stressors, and the test is best used to guide personalised stress-management and adaptogenic interventions rather than hormone replacement.
Frequently asked questions
Serum cortisol is a single-timepoint plasma measurement used to diagnose adrenal insufficiency or Cushing syndrome. The Advanced Adrenal Stress Test maps the entire diurnal curve through multiple timed saliva samples, capturing circadian rhythm and the cortisol awakening response — it is a functional assessment rather than a diagnostic test for endocrine disease.
How to access the Adrenal Stress Profile test
The Adrenal Stress Profile reference page is free and open to all practitioners. Create a free practitioner account to see pricing, save tests to your list, and generate requisition forms. Verification takes 1–2 business days.
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Published: October 7, 2026
Last reviewed: October 7, 2026
- Clow A, et al. The cortisol awakening response: more than a measure of HPA axis function. Neurosci Biobehav Rev. (2010)
- Cadegiani FA, Kater CE. Adrenal fatigue does not exist: a systematic review. BMC Endocr Disord. (2016)
- Nieman LK, et al. The diagnosis of Cushing's syndrome: an Endocrine Society clinical practice guideline. J Clin Endocrinol Metab. (2008)
- Bornstein SR, et al. Diagnosis and treatment of primary adrenal insufficiency: an Endocrine Society clinical practice guideline. J Clin Endocrinol Metab. (2016)
- Stalder T, et al. Assessment of the cortisol awakening response: expert consensus guidelines. Psychoneuroendocrinology. (2016)
This content is for licensed healthcare practitioners only and does not constitute medical advice. Clinical decisions should be based on the full clinical picture and not on any single test result.
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