What is the cortisol awakening response?

The cortisol awakening response is the sharp rise in cortisol within 30–45 minutes of waking, distinct from the broader circadian peak. It is captured by collecting a sample immediately upon waking and another 30 minutes later; blunted or exaggerated responses may reflect HPA dysregulation.

Can this panel diagnose Addison disease or Cushing syndrome?

No. The Adrenal Stress Panel is a functional screening tool. Suspected Addison disease or Cushing syndrome requires endocrine referral and confirmatory testing (serum cortisol, ACTH, dynamic tests) according to Endocrine Society guidelines.

What is 'adrenal fatigue' and is it recognised medically?

Adrenal fatigue is a term used in functional and integrative medicine to describe fatigue and symptoms attributed to HPA axis dysregulation. It is not recognised as a diagnosis in mainstream endocrinology, and systematic reviews have not validated it as a distinct disease entity.

Why is collection timing so important?

Cortisol secretion is highly circadian and the awakening response occurs within minutes of waking. Even small delays or non-adherence — collecting after standing, eating, or vigorous activity — distort the curve and invalidate interpretation. A patient log of exact times is essential.

What does a high evening or bedtime cortisol mean?

Elevated evening or bedtime cortisol — a failure of the normal decline — is associated with chronic stress, sleep disturbances, metabolic syndrome, and, when very high, may suggest Cushing syndrome. It disrupts restorative sleep and the circadian low phase.

What does the cortisol:DHEA ratio tell us?

The cortisol:DHEA ratio is interpreted in functional practice as a balance between catabolic stress (cortisol) and anabolic resilience (DHEA). A high ratio is seen as catabolic dominance, a low ratio as anabolic or, if cortisol is very low, cortisol insufficiency. The ratio is method-specific and not universally standardised.

BML-ADR-021adrenal stressUSA

Adrenal Stress Panel

Q: What is the difference between this panel and a serum cortisol test?

A single serum cortisol captures one moment in a pulsatile system, whereas the Adrenal Stress Panel maps the entire diurnal curve with multiple timed saliva samples, revealing the shape of the rhythm and free (unbound) cortisol. Serum cortisol is used for endocrine diagnosis; the salivary panel is a functional tool.

Q: What should patients avoid before collecting saliva?

Avoid eating, drinking anything except water, brushing teeth, using mouthwash, vigorous exercise, and smoking for 30 minutes before each collection, to prevent contamination and acute cortisol spikes that mask the natural rhythm.

The Adrenal Stress Panel measures cortisol at four or five timepoints across the waking day and morning DHEA in saliva to map the diurnal HPA axis rhythm and cortisol:DHEA balance. It is a functional assessment tool used in integrative practice to investigate chronic stress, fatigue, sleep disturbance, and suspected circadian dysregulation, interpreted in clinical context rather than as a…

Biomarkers

Saliva

Sample

7–10 business days

Turnaround

Fasting

What is the Adrenal Stress Panel test?

The Adrenal Stress Panel uses serial salivary specimens collected at defined times across the waking day to map the diurnal cortisol curve and measure dehydroepiandrosterone (DHEA), offering a functional snapshot of hypothalamic–pituitary–adrenal (HPA) axis activity. It is ordered to investigate symptoms attributed to chronic stress, suspected circadian rhythm disruption, or adrenal dysregulation, and to guide interventions aimed at restoring HPA balance in integrative and functional medicine practice. Unlike a single-timepoint serum cortisol, which captures only a moment in a pulsatile and circadian-varying system, the salivary multi-point profile reveals the shape of the daily curve — the morning rise, the daytime decline, and the evening nadir — and the cortisol:DHEA balance. Practitioners order the panel when fatigue, sleep disturbance, mood symptoms, or metabolic complaints suggest HPA axis involvement, and interpret the results as part of a broader functional assessment rather than as a stand-alone diagnostic test for primary adrenal disease.

What does the Adrenal Stress Panel test measure?

Cortisol-Aw(Cortisol (awakening))

Range: Salivary cortisol upon waking typically 6–25 nmol/L; Ayumetrix-specific intervals apply.Optimal: Functional practitioners often cite a robust awakening rise; however, population norms vary and method-specific intervals must be applied.nmol/L / µg/dL

Cortisol awakening response represents the immediate rise in cortisol secretion following morning waking, driven by suprachiasmatic-hypothalamic signalling. This surge prepares the organism for the day's demands and is distinct from the broader circadian pattern. Collection must occur within minutes of natural waking, before standing or activity, to capture the peak accurately.

A blunted awakening response may indicate HPA axis hypo-reactivity or adrenal insufficiency, while an exaggerated peak can reflect chronic stress or heightened anticipatory anxiety. The awakening sample anchors interpretation of the daytime cortisol curve.

Cortisol-AM(Cortisol (morning, ~30 minutes post-waking))

Range: Salivary cortisol approximately 5–20 nmol/L; Ayumetrix-specific intervals apply.Optimal: A clear rise from the awakening sample to this timepoint is considered healthy; absolute targets are method-dependent.nmol/L / µg/dL

The post-waking sample captures the cortisol awakening response peak, which normally occurs 30–45 minutes after waking. This second timepoint confirms the magnitude and timing of the morning cortisol surge, which is the highest daily cortisol level under normal circadian rhythm.

The magnitude of the rise from awakening to 30-minutes-post reflects HPA axis responsiveness. A flat or absent rise may indicate adrenal exhaustion or dysregulation, while an excessive rise can accompany chronic stress, depression, or sleep disorders.

Cortisol-MD(Cortisol (midday))

Range: Salivary cortisol typically 3–10 nmol/L; Ayumetrix-specific intervals apply.Optimal: A midday cortisol clearly lower than the morning peak but above the evening nadir is expected; absolute values are assay-specific.nmol/L / µg/dL

Midday cortisol, collected around lunchtime or early afternoon, reflects the declining slope of the circadian cortisol curve after the morning peak. Secretion is pulsatile but the overall trend is downward through the day.

Persistently elevated midday cortisol suggests incomplete diurnal decline and may reflect sustained HPA activation or stress exposure. An abnormally low midday level can indicate insufficient cortisol production or a flattened circadian rhythm.

Cortisol-PM(Cortisol (evening))

Range: Salivary cortisol typically 1–4 nmol/L; Ayumetrix-specific intervals apply.Optimal: Evening cortisol should be substantially lower than morning values; the specific target is method-dependent.nmol/L / µg/dL

Evening cortisol, collected in the late afternoon or early evening, continues the downward trajectory towards the circadian nadir. By this time cortisol secretion is suppressed in preparation for night-time rest and tissue repair.

Elevated evening cortisol — a failure of the normal decline — is associated with sleep disturbances, metabolic syndrome, and chronic stress states. Low evening cortisol is less commonly pathological but may accompany a severely flattened rhythm or adrenal insufficiency.

Cortisol-Nt(Cortisol (night/bedtime))

Range: Salivary cortisol at bedtime typically <1.5–3 nmol/L; Ayumetrix-specific intervals apply.Optimal: Bedtime cortisol should be near the daily minimum; absolute targets are assay-specific.nmol/L / µg/dL

The night-time or bedtime sample captures the circadian nadir, when cortisol secretion is maximally suppressed under the influence of the suprachiasmatic nucleus and the absence of wakefulness drive. Collection should occur at the patient's usual bedtime, before sleep.

Elevated bedtime cortisol disrupts sleep onset and maintenance and is a hallmark of chronic stress, Cushing syndrome, or depression. A persistently high night-time cortisol abolishes the restorative low phase of the rhythm.

DHEA-AM(Dehydroepiandrosterone (DHEA, morning))

Range: Salivary DHEA approximately 50–250 pg/mL (sex- and age-dependent); Ayumetrix-specific intervals apply.Optimal: Functional practitioners look for age-appropriate DHEA and a balanced cortisol:DHEA ratio; reference data are assay- and population-specific.ng/mL / nmol/L

Dehydroepiandrosterone is the principal adrenal androgen precursor, secreted in parallel with cortisol but with a less pronounced circadian rhythm. DHEA and its sulphate (DHEAS) modulate immune function, neurosteroid activity, and anabolic processes, counterbalancing some catabolic effects of cortisol.

DHEA is often measured to assess adrenal reserve and to calculate a cortisol:DHEA ratio, which some practitioners interpret as a balance between catabolic stress and anabolic resilience. Low DHEA may accompany ageing, chronic illness, or adrenal insufficiency, while high DHEA is less common and may reflect adrenal hyperplasia.

Cortisol:DHEA(Cortisol:DHEA ratio (morning))

Range: Calculated from morning cortisol and morning DHEA; interpretive thresholds are method-specific.Optimal: Functional medicine sources propose target ranges, but these are not universally standardised and should be applied cautiously.ratio

The cortisol:DHEA ratio is a derived marker that expresses the relative balance between the catabolic stress hormone cortisol and the anabolic androgen precursor DHEA. Both are secreted by the adrenal cortex under ACTH drive, but their ratio may shift with chronic stress, ageing, or illness.

A high cortisol:DHEA ratio is interpreted by functional and integrative practitioners as reflecting catabolic dominance or 'stress overload,' while a low ratio may suggest anabolic resilience or, in some contexts, relative cortisol insufficiency. The ratio must be interpreted in the context of absolute cortisol and DHEA values and the clinical picture.

Why is the Adrenal Stress Panel test ordered?

Evaluation of chronic fatigue, low energy, or difficulty waking that is not explained by sleep quantity or thyroid status and may reflect altered HPA axis function
Investigation of sleep-onset or sleep-maintenance insomnia, particularly when accompanied by evening hyperarousal or a 'second wind' at night
Assessment of mood dysregulation, anxiety, or depressive symptoms in the context of chronic stress, where HPA axis activity contributes to symptom burden
Functional evaluation of patients with metabolic syndrome, central adiposity, or dysglycaemia who report chronic stress or burnout
Monitoring of patients undergoing stress-reduction, adaptogen, or lifestyle interventions who wish to track changes in diurnal cortisol patterns over time
Screening for circadian rhythm flattening or phase shifts in shift workers, frequent travellers, or individuals with irregular sleep schedules
Complementary assessment in chronic pain or fibromyalgia, where HPA axis dysregulation is commonly reported
Investigation of suspected 'adrenal fatigue' — a non-medical term used in functional practice to describe a spectrum of HPA dysregulation not meeting criteria for Addison disease or Cushing syndrome

Sample collection and turnaround

Sample type

Saliva

Fasting required

Collection method

At-home collection kit

Turnaround

7–10 business days

Collection notes

Patients collect saliva at four or five specified times across a single waking day: upon waking (before standing), 30 minutes post-waking, midday, evening, and bedtime. Each sample is collected by passive drool into a labelled tube. Avoid eating, drinking (except water), brushing teeth, vigorous exercise, and smoking for 30 minutes before each collection. A patient log recording exact collection times is critical for interpretation.

Specimen requirements

Passive drool saliva collected into Ayumetrix-provided tubes at the specified timepoints. Each sample must be labelled with the exact collection time. Refrigerate samples after collection and ship with the ice pack and prepaid mailer provided in the kit.

What can affect Adrenal Stress Panel results?

variableTiming and adherence to collection protocol

The cortisol awakening response is time-sensitive; delays or non-adherence (e.g. collecting the awakening sample after standing or eating) invalidate the curve. Written instructions and patient logs are essential.

variableMedications affecting the HPA axis

Glucocorticoid therapy suppresses endogenous cortisol, oestrogen and oral contraceptives raise cortisol-binding globulin (less relevant in free salivary cortisol but may affect interpretation), and antidepressants and benzodiazepines can modulate HPA output.

elevatesAcute illness, infection, or physical trauma

Acute physiological stress activates the HPA axis and raises cortisol across the day, masking chronic patterns; defer collection until the patient is well.

variableShift work, recent transmeridian travel, and irregular sleep schedules

Circadian misalignment shifts or flattens the cortisol rhythm, making interpretation difficult; results reflect the circadian state at the time of collection rather than a stable baseline.

variableOral contamination and specimen handling

Blood from gingival inflammation or food residues can contaminate saliva and alter cortisol and DHEA measurements; patients should avoid eating, drinking (except water), brushing teeth, or using mouthwash for 30 minutes before each collection.

elevatesExercise, caffeine, and nicotine before collection

Physical activity and stimulants acutely raise cortisol; these should be avoided or standardised before and between collections to preserve the natural diurnal pattern.

What do Adrenal Stress Panel results mean?

Elevated

Morning cortisol: acute stress, anxiety, depression, early Cushing syndrome; evening/night cortisol: chronic stress, sleep disturbance, metabolic syndrome, Cushing syndrome. A persistently elevated and flattened curve suggests chronic HPA activation. High DHEA is uncommon and may reflect congenital adrenal hyperplasia or, in functional interpretation, an attempt to counterbalance cortisol. High cortisol:DHEA ratio: interpreted as catabolic dominance or 'stress overload' in functional practice.

Normal

A normal diurnal curve — robust morning rise, smooth daytime decline, low evening nadir — and age-appropriate DHEA suggest intact HPA axis function and circadian rhythm. Normal results do not exclude other causes of fatigue or mood symptoms and should be integrated with the full clinical picture.

Reduced

Morning cortisol: adrenal insufficiency (primary or secondary), chronic fatigue syndrome, post-traumatic stress disorder with HPA hypo-reactivity. Low cortisol across all timepoints raises concern for primary or secondary adrenal insufficiency and warrants endocrine referral and confirmatory serum testing (morning serum cortisol, ACTH stimulation test). Low DHEA: ageing, chronic illness, adrenal insufficiency. Low cortisol:DHEA ratio: interpreted as relative anabolic dominance or, if cortisol is very low, cortisol insufficiency.

Note: The Adrenal Stress Panel is a functional assessment tool, not a diagnostic test for Addison disease or Cushing syndrome; suspected primary adrenal pathology requires endocrine workup with serum cortisol, ACTH, and dynamic testing. Salivary cortisol intervals and the cortisol:DHEA ratio are assay- and laboratory-specific and not interchangeable between platforms. The concept of 'adrenal fatigue' is not recognised in conventional endocrinology, and results should be interpreted as reflecting HPA axis activity and circadian rhythm rather than organ failure. Acute stress, illness, and non-adherence to the collection protocol are common sources of misinterpretation.

Frequently asked questions

A single serum cortisol captures one moment in a pulsatile system, whereas the Adrenal Stress Panel maps the entire diurnal curve with multiple timed saliva samples, revealing the shape of the rhythm and free (unbound) cortisol. Serum cortisol is used for endocrine diagnosis; the salivary panel is a functional tool.

How to access the Adrenal Stress Panel test

The Adrenal Stress Panel 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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About this page

Published: October 7, 2026

Last reviewed: October 7, 2026

References:

Stalder T, et al. Assessment of the cortisol awakening response: expert consensus guidelines. Psychoneuroendocrinology. (2016)
Nieman LK, et al. The diagnosis of Cushing's syndrome: an Endocrine Society clinical practice guideline. (2008)
Cadegiani FA, Kater CE. Adrenal fatigue does not exist: a systematic review. BMC Endocr Disord. (2016)
Hellhammer DH, et al. Salivary cortisol as a biomarker in stress research. Psychoneuroendocrinology. (2009)
Bornstein SR, et al. Diagnosis and treatment of primary adrenal insufficiency: an Endocrine Society clinical practice guideline. (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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