InstalabAdrenal Function Profile
Should you take a Adrenal Function Profile test?
This test is most useful if any of these apply to you.
5 Biomarkers Included
- Cortisol AM30Taken 30 minutes after waking, this measures how strongly your adrenal glands switch on for the day. It is the most useful point for spotting an underactive morning response.A low morning value with an overall low curve should prompt clinician review and formal testing for adrenal insufficiency.
- Cortisol NoonThe midday sample anchors the middle of the curve, connecting the morning peak to the evening decline so the overall slope can be judged rather than guessed from two points.A midday value that stays near the morning level suggests the daily fall-off is beginning too slowly.
- Cortisol EveningThe evening sample shows whether cortisol is coming down as the day ends. Values that stay elevated into the evening are a marker of a flattened rhythm.Elevated evening cortisol is one of the clearest signs the normal daily decline has been lost.
- Cortisol NightThe late-night sample captures the low point cortisol should reach at rest. It is the single most informative value for detecting cortisol excess, since losing this floor is an early sign.A high night-time value with a flat daily decline is the pattern most linked to cortisol excess and to cardiovascular and metabolic risk.
- DHEA-SA slow-changing adrenal hormone that reflects longer-term output rather than the moment. It helps show whether an abnormal cortisol curve reflects chronic strain or reduced reserve.A normal DHEA-S makes corticotropin deficiency unlikely, most reliably in younger adults; a low value with a disrupted curve suggests reduced reserve.
About Adrenal Function Profile
A single cortisol test tells you where your stress hormone sat at one moment. It cannot tell you whether your daily hormone rhythm is healthy, because cortisol is meant to swing widely between morning and night.
This panel captures that swing. It measures cortisol at four points across one day and adds DHEA-S (a longer-lasting hormone your adrenal glands make), to show whether your stress-response system is holding its normal shape. This is a pattern screen, not a stand-alone diagnosis of adrenal disease.
What This Panel Reveals
Healthy cortisol follows a predictable arc. It climbs in the last hours of sleep, peaks about 30 minutes after you wake, then falls steadily to its lowest point late at night. This is the rhythm of your stress-response system (the hypothalamic-pituitary-adrenal axis, or HPA axis), and the whole value of this panel is tracing the arc rather than catching one point on it.
The morning sample, taken 30 minutes after waking, reflects how strongly your adrenal glands switch on for the day. The noon and evening samples show how the curve comes down. The late-night sample matters most: it reflects the floor cortisol should reach at rest, and losing that low point is one of the earliest signals of cortisol excess.
DHEA-S adds a different angle. It is an adrenal hormone that changes slowly, so it reflects your longer-term adrenal output rather than a single moment. Read next to the cortisol curve, it helps separate a system under chronic strain from one with genuinely reduced reserve. The balance between the two, sometimes described as glucocorticoid dominance, is used in integrative practice as a rough index of how hard the axis is working, though it is not a standard endocrinology metric.
How to Read Your Results Together
No single number here carries the story. The shape of the curve and its relationship to DHEA-S is what points toward a pattern. These are interpretations to explore with a clinician, not verdicts.
| Pattern | What it may suggest |
|---|---|
| High evening and night cortisol with little drop from morning | A flattened rhythm, a pattern linked in population studies to higher cardiovascular and metabolic risk |
| Low morning (AM30) cortisol with a low overall curve | Reduced morning output that warrants clinician review and formal testing for adrenal insufficiency |
| High cortisol through the day with low DHEA-S | A glucocorticoid-dominant imbalance seen with chronic stress and with aging |
| Normal morning peak, low night level, normal DHEA-S | A well-synchronized axis, making the conditions this panel screens for less likely |
What to Do with Your Results
If your morning cortisol is low and the whole curve sits low, that deserves prompt attention. Bring the result to a physician, ideally an endocrinologist, because confirming adrenal insufficiency requires a dynamic test such as a corticotropin (ACTH) stimulation test, which the major guidelines treat as the reference standard. This panel can raise the question, but it does not answer it.
If the late-night value stays high and the daily decline looks flat, that pattern has been associated in cohort studies with cardiovascular and metabolic risk. Practical next steps focus on the drivers you can influence: sleep timing, night-shift schedules, and sustained stress. Companion tests worth adding include thyroid markers and iron studies, which cover common alternative causes of fatigue.
Because a single day is not enough to define your usual rhythm, serial tracking matters. If you retest after changing your sleep or workload, a curve that regains its morning peak and night-time floor is the direction you want. A flattening curve over repeated draws is a signal to look harder, not a diagnosis on its own.
When Results Can Be Misleading
This panel is sensitive to how the day was lived, and several factors can distort every sample at once. Recent steroid medication (including creams, inhalers, and joint injections) can suppress the whole curve. Acute illness, poor sleep the night before, night-shift work, smoking, and licorice can all shift the readings. Collecting a sample at the wrong time is the most common avoidable error.
One caution about framing: despite its popularity, "adrenal fatigue" is not a recognized medical diagnosis, and a systematic review found no evidence that cortisol testing can identify it. Use this panel to understand your rhythm and to screen for real HPA-axis problems, not to confirm a condition that established endocrinology does not support.