Advanced Diagnostics · Adrenal Health
Stress Is Reshaping Your Biology. Measure the Damage.
Chronic stress disrupts your cortisol rhythm — and when that rhythm breaks, it affects sleep, metabolism, mood, immunity, and hormones. Four salivary samples map exactly where you stand.
Your stress system runs on a precise daily clock.
The HPA axis — Hypothalamic-Pituitary-Adrenal — is your body's stress command system. Chronic activation keeps it dysregulated long after the stressor is gone.
Standard labs test a single cortisol value and call it normal. This test captures the full daily arc — revealing whether the pattern is functioning the way it should.
What this test measures
Hypothalamus
Detects stressor — internal or external
CRH release
Pituitary Gland
Receives CRH signal
ACTH release
Adrenal Cortex
Produces cortisol and DHEA in response
Cortisol + DHEA into bloodstream
🧪 Measured in saliva — 4× daily
Free, biologically active hormone captured at each time point
Four samples. One complete picture.
Each collected at a specific phase of the cortisol arc — timing precision is what makes this test clinically meaningful.
Upon Waking
Morning Peak
Cortisol should be at its daily high. A blunted peak is the first sign of HPA burnout.
Should be: HighMidday · 11am–1pm
Morning Decline
Cortisol should have dropped significantly but hold moderate levels to sustain afternoon function.
Should be: DecliningLate Afternoon · 3–5pm
Afternoon Trough
Cortisol should be low. Paradoxically elevated values here point to cortisol dysregulation.
Should be: LowBedtime · 10pm–Midnight
Low Point
Cortisol should be near zero. Elevated bedtime cortisol is the leading reversible cause of insomnia.
Should be: Near zeroThe shape of the curve tells you everything
A single cortisol value is nearly meaningless. These are the six patterns this test identifies.
Elevated Cortisol
Cortisol running high across multiple time points — active, unresolved stress load with the HPA in sustained overdrive.
Blunted / Low Cortisol
Chronically suppressed output — especially low morning cortisol — signals late-stage HPA burnout after prolonged activation.
Inverted Rhythm
Low morning, high evening — the curve is upside down. Strongly linked to insomnia and circadian misalignment.
Flat Curve
Minimal daily variation — the circadian signal has been eroded after years of chronic stress or shift work.
Low DHEA : High Cortisol
Catabolic processes dominating anabolic — accelerates biological aging, degrades muscle, and impairs immune function.
Blunted CAR
The awakening response is flat — the biological clock isn't preparing the body for the day. A hallmark of burnout.
Associated Conditions
HPA axis dysfunction is implicated in all of the following
Order to insight in three steps
Consult & Order
Your Mend practitioner reviews your symptoms and orders the kit — shipped directly to your door. Telehealth eligible across Arizona.
Practitioner-orderedCollect & Return
Four timed salivary samples over one day using passive drool tubes — no needles, no clinic visit. Ship with included prepaid materials to a CLIA-certified laboratory.
Results in 7–10 business daysPractitioner Review
Your Mend practitioner walks through the full diurnal curve and builds a targeted intervention plan.
Actionable protocol, not just dataFAQ
Common Questions
Related Testing
Diagnostics Often Ordered Together
Your Cortisol Rhythm Is Either Working For You, or Against You.
Four salivary samples. One morning at home. A complete picture of how your stress system is actually functioning — and exactly what to do about it.