Currently, chronic stress and adrenal dysfunction are among the most common yet most overlooked causes of persistent exhaustion, anxiety, insomnia, and hormonal imbalance — affecting millions of people across all age groups. While conventional medicine does not formally recognise "adrenal fatigue" as a diagnosis, the clinical syndrome of HPA axis dysregulation — in which the stress response system becomes dysregulated following prolonged or intense stress — is a well-documented and increasingly understood phenomenon that responds to targeted treatment.
Chronic stress and adrenal fatigue are among the most common and overlooked causes of persistent exhaustion, anxiety, and hormonal imbalance.
Answer 5 questions about how you feel on a day-to-day basis to assess your adrenal health and stress load — and find out what you can do about it.
How often do you experience this?
Adrenal Fatigue & Stress Assessment — HRT.org
Adrenal fatigue is a term used to describe a collection of non-specific symptoms — including persistent tiredness, difficulty waking in the morning, energy crashes, irritability, anxiety, poor sleep, and salt and sugar cravings — that are attributed to the reduced or dysregulated function of the adrenal glands in response to chronic stress. The adrenal glands, which sit on top of each kidney, produce cortisol (the primary stress hormone), DHEA, aldosterone, and adrenaline — hormones essential for managing the body's stress response, energy production, and hormonal balance.
Cortisol is the body's primary stress hormone, released by the adrenal cortex in response to physical or psychological stress and regulated by the circadian rhythm. In healthy individuals, cortisol follows a diurnal pattern — peaking in the morning to support wakefulness and energy, and declining gradually throughout the day. Cortisol plays a central role in regulating blood sugar, immune function, inflammation, blood pressure, metabolism, and the sleep-wake cycle. Chronic dysregulation of cortisol output disrupts all of these systems simultaneously, producing the wide-ranging symptoms associated with adrenal fatigue.
Yes, you can test your cortisol levels at home using a reliable at-home salivary cortisol test kit. A 4-point salivary cortisol test — with samples collected on waking, at noon, in the afternoon, and at bedtime — is the gold standard for mapping the daily cortisol curve and identifying HPA axis dysregulation. You can also use our quiz above as a validated screening tool to assess your current adrenal stress burden before deciding whether to order a full adrenal panel.
- Stage 1 — Alarm/Wired — The body responds to stress with elevated cortisol output. The person may feel wired but tired, have difficulty winding down in the evening, and experience anxiety and disrupted sleep. DHEA levels begin to decline as the adrenal glands prioritise cortisol production.
- Stage 2 — Adaptation/Resistance — Cortisol output remains elevated but begins to become less efficient. Fatigue becomes more noticeable, particularly in the afternoon. Mood instability, increased caffeine dependence, and reliance on sugar for energy emerge.
- Stage 3 — Exhaustion — Cortisol output begins to fall below normal. The person experiences profound and persistent fatigue that does not improve with rest, severe sleep disruption, and crashing energy levels. The immune, thyroid, and reproductive hormone systems are significantly compromised.
- Stage 4 — Adrenal Collapse — The most severe form, also termed adrenal insufficiency or Addison's disease (when autoimmune). Cortisol output is critically depleted. This is a medical emergency requiring urgent clinical assessment and treatment.
The following tests are available to evaluate adrenal function and identify related hormonal imbalances:
- 4-point salivary cortisol (morning, noon, afternoon, evening) — the gold standard for HPA axis assessment
- DHEA-S (blood) — declines significantly with chronic stress and adrenal fatigue
- Cortisol awakening response (CAR) — blunted CAR indicates HPA dysfunction
- Testosterone (total and free) — adrenal stress suppresses sex hormone production
- Progesterone — chronic stress depletes progesterone via "pregnenolone steal"
- TSH, Free T3, Free T4 — adrenal dysfunction commonly impairs thyroid hormone conversion
- Blood glucose and HbA1c — cortisol dysregulation affects blood sugar regulation
- Full Blood Count and inflammatory markers (CRP, ESR)
- Magnesium (red blood cell) — rapidly depleted by chronic stress
- Vitamin B5 (pantothenic acid) — essential cofactor for adrenal hormone synthesis
- Vitamin C — the adrenal glands have the highest concentration of vitamin C of any organ in the body
4-Point Salivary Cortisol—This test maps the full daily cortisol curve. A healthy pattern shows high morning cortisol that declines steadily throughout the day. Common pathological patterns include elevated cortisol at all time points (stage 1–2 burnout), a flattened curve with blunted morning peak (stage 3), or an inverted pattern with low morning and elevated evening cortisol associated with insomnia.
DHEA-S Test—DHEA is the most abundant adrenal hormone and a precursor to sex hormones. It consistently declines with age and with adrenal stress. Low DHEA-S alongside dysregulated cortisol confirms significant adrenal involvement. Restoring DHEA with micronised supplementation can meaningfully improve energy, mood, immune function, and resilience.
Thyroid Panel—Adrenal dysfunction and thyroid dysfunction are closely linked and frequently co-exist. Elevated cortisol impairs the conversion of inactive T4 to active T3, producing hypothyroid symptoms even when TSH is normal. Always assess both systems together.
Testosterone and Progesterone—Both sex hormones share a common synthetic pathway with cortisol (via pregnenolone). Under chronic stress, pregnenolone is diverted preferentially into cortisol synthesis — depleting the building blocks available for testosterone and progesterone production. This explains why adrenal fatigue is so frequently accompanied by low libido, mood changes, and reduced stress tolerance.
4-Point Salivary Cortisol—A flat or low cortisol curve across all time points suggests late-stage adrenal fatigue. Elevated cortisol at all points indicates early-stage HPA activation or chronic stress response.
DHEA-S Test—Low DHEA-S alongside cortisol dysregulation confirms significant adrenal involvement.
Thyroid Panel—Elevated cortisol impairing T4-to-T3 conversion may produce hypothyroid symptoms even with a normal TSH. You can also assess this using our Comprehensive Adrenal & Hormone Panel.
Testosterone and Progesterone—Both are commonly suppressed in adrenal fatigue due to pregnenolone steal, contributing to low libido, mood changes, and poor stress tolerance.
- Prolonged or intense psychological stress (work, relationship, financial)
- Physical stress — chronic illness, surgery, infection, overtraining
- Sleep deprivation and circadian rhythm disruption
- Gut dysbiosis and intestinal permeability ("leaky gut")
- Blood sugar instability — excessive sugar and refined carbohydrate intake
- Excess caffeine and stimulant use
- Nutritional deficiencies — magnesium, B vitamins, vitamin C, zinc
- Thyroid dysfunction (often co-exists with and perpetuates adrenal dysfunction)
- Autoimmune conditions
- Chronic inflammation
- Environmental toxin exposure
Treatment for adrenal fatigue and HPA axis dysregulation may include:
- DHEA replacement (oral micronised DHEA) for confirmed low DHEA-S
- Adaptogenic herbs — ashwagandha, rhodiola rosea, and eleuthero have the strongest clinical evidence for reducing cortisol and improving stress resilience
- Adrenal glandular extracts — used by functional medicine practitioners to support adrenal recovery in severe cases
- Low-dose hydrocortisone — used cautiously by specialist clinicians in confirmed, severe adrenal insufficiency
- Thyroid hormone optimisation — essential if concurrent hypothyroidism or impaired T4-to-T3 conversion is identified
- Sex hormone support — testosterone or progesterone replacement where indicated by testing
Natural support may also include prioritising 8–9 hours of sleep, reducing caffeine particularly after noon, eliminating refined sugars, magnesium glycinate (300–400mg before bed), vitamin B5 (500mg/day), vitamin C (2000–3000mg/day in divided doses), and zinc. Gentle exercise — walking, yoga, swimming — supports recovery without further taxing the adrenals. Mindfulness, breathwork, and structured rest are as important as any supplement.
Based on your adrenal fatigue assessment and symptoms, you may be experiencing HPA axis dysregulation or adrenal fatigue.
See a healthcare practitioner to discuss your symptoms and possible testing, or order tests on your own and share results with your doctor.
References
1Fries E, et al. "A new view on hypocortisolism." Psychoneuroendocrinology. 2005;30(10):1010–1016.
2Chrousos GP. "Stress and disorders of the stress system." Nat Rev Endocrinol. 2009;5(7):374–381.
3Nicolson NA. "Measurement of cortisol." Methods in the Behavioral Sciences. 2008;2:37–74.
A deficiency or dysregulation of adrenal hormones — particularly cortisol and DHEA — can affect virtually all body functions. The severity of symptoms ranges from mild fatigue and irritability to complete exhaustion and inability to function in daily life. It is estimated that a significant proportion of adults in modern, high-stress societies experience some degree of HPA axis dysregulation, yet very few receive appropriate assessment or treatment.
Self-assessment Questionnaire
Because many symptoms of adrenal fatigue are similar to those of depression, thyroid disorders, anaemia, and other conditions, they can easily be confused or misinterpreted. The key distinguishing features of HPA axis dysregulation are the characteristic energy pattern — worst in the morning and afternoon, better in the evening — the inability to recover from stress, and the progressive worsening of symptoms under sustained demand.
We strongly suggest that you contact your healthcare provider if you have any concerns that you may be experiencing adrenal fatigue or HPA axis dysfunction. The self-assessment above should not be substituted for hormonal testing by your provider.
An adrenal fatigue assessment is typically done by combining a validated symptom questionnaire — such as the one on this page — with a 4-point salivary cortisol test measuring cortisol at morning, noon, afternoon, and evening. A DHEA-S blood test is always performed alongside cortisol for a complete adrenal picture. Thyroid and sex hormone testing is also recommended, as these systems are closely interconnected with adrenal function.
Yes, most home salivary cortisol tests are accurate when collected correctly and processed by certified laboratories. Salivary cortisol measurements closely reflect the free (biologically active) fraction of cortisol and are well validated for HPA axis assessment. Multiple collection time points are essential — a single cortisol measurement is of limited clinical value for diagnosing adrenal fatigue.
Online adrenal fatigue assessments using validated symptom questionnaires and at-home salivary cortisol kits are effective and widely used in functional and integrative medicine. They provide a practical, accessible way to begin the assessment process and help identify the level of severity that should prompt laboratory investigation.
Yes, physical signs of adrenal fatigue include persistent dark circles under the eyes, low blood pressure, dizziness on standing, salt cravings, increased susceptibility to infection, thinning hair, and dry skin. In more advanced cases, low morning temperature, hypoglycaemic episodes, and extreme sensitivity to cold may be present. These physical signs combined with the characteristic symptom pattern — worst in the morning, crash at 3–4pm, and often feeling more alert in the evening — are the key clinical indicators of HPA axis dysregulation.
