InstalabComprehensive Adrenal Function Profile
Should you take a Comprehensive Adrenal Function Profile test?
This test is most useful if any of these apply to you.
6 Biomarkers Included
- Cortisol AM30A steroid hormone measurement taken from saliva 30 minutes after waking that captures the morning surge your stress response system produces to prepare your body and brain for the day ahead.
- Cortisol NoonA steroid hormone produced by the adrenal glands that regulates your body's response to stress, controls blood sugar, and follows a daily rhythm that peaks in the morning and falls throughout the day.
- Cortisol EveningA steroid hormone produced by the adrenal glands, measured at the time of day when it should be at its lowest point, revealing whether your body's natural stress hormone rhythm is functioning properly.
- Cortisol NightA steroid hormone measured at bedtime to check whether your body's natural cortisol rhythm is intact, since cortisol should drop to its lowest point in the evening and a failure to drop can signal serious hormonal overproduction.
- DHEA-SA long-lived form of a hormone made almost entirely by your adrenal glands that serves as a building block for sex hormones and a counterweight to your body's stress hormone.
- Secretory IgAAn antibody made in your salivary glands that coats the inside of your mouth and throat as a frontline defense against germs.
About Comprehensive Adrenal Function Profile
Cortisol does not stay still. It surges in the early morning, falls steeply through the day, and bottoms out at night. That rhythm is the signal, and a single blood draw catches one note from a song that plays around the clock.
This panel listens to the whole song. Saliva collected at four points across one day shows how your stress system is actually behaving, paired with two markers that reveal what that pattern is doing to your hormonal reserve and your front-line immune defenses.
What This Panel Reveals
Three clinical pictures emerge when you look at the six results together: the daily cortisol curve, your adrenal reserve, and the stress impact on mucosal immunity. None of them shows up in a single morning blood test.
Your Daily Cortisol Curve
The four cortisol samples track the natural rise and fall of your main stress hormone. A healthy pattern peaks shortly after waking, drops sharply by noon, falls further by evening, and reaches its lowest point near sleep. The shape of that curve is called the diurnal slope.
A meta-analysis pooling dozens of studies linked flatter diurnal cortisol slopes to worse mental and physical health outcomes, including depression, fatigue, obesity, and cardiovascular disease. In a large UK cohort study (Whitehall II), a flatter slope independently predicted higher all-cause and cardiovascular mortality.
Your Adrenal Reserve
Your adrenal glands also make DHEA-S, short for dehydroepiandrosterone sulfate, a precursor to other sex hormones that helps balance the breakdown effects of cortisol. When chronic stress drives cortisol up for long periods, DHEA-S often falls. The ratio between cortisol and DHEA-S gives a read on whether your hormonal system is leaning toward repair or toward breakdown.
Your Stress-Immune Link
Secretory immunoglobulin A (sIgA) is the antibody that coats the linings of your mouth, gut, and airways. It is your first defense against incoming pathogens. Sustained psychological stress has been associated in research with reduced sIgA, which helps explain why people under chronic pressure tend to catch more upper respiratory infections.
How to Read Your Results Together
Looking at one number rarely tells you much. The patterns across all six markers are where the value lives. Use the table below as a starting framework, not a diagnosis.
| Pattern across the day | What this often suggests |
|---|---|
| High morning, flat afternoon and evening | Chronic stress activation linked in research to depression, fatigue, and disrupted sleep |
| Low across all four time points | A blunted stress response, sometimes seen after years of chronic strain or in long-standing burnout |
| Normal morning, elevated evening or night | Cortisol is failing to wind down; common in shift work, late evening screen use, and unresolved worry |
| Elevated cortisol with low DHEA-S | A breakdown-favoring state where the build-up-to-breakdown ratio has shifted unfavorably |
| Otherwise normal cortisol with low sIgA | Stress is reaching the immune system even if the cortisol curve looks acceptable |
When Results Can Be Misleading
Several factors can shift this entire panel at once, so confounders matter more than usual.
- Oral, inhaled, and topical corticosteroids suppress cortisol and DHEA-S
- Estrogen-containing birth control changes how cortisol is bound and reported, though salivary readings are less affected than blood
- Shift work, recent travel across time zones, or one bad night of sleep can scramble the curve
- Acute illness, infection, or recent injury raises cortisol broadly
- Eating, drinking, brushing teeth, or smoking within thirty minutes of a sample can contaminate saliva
- High caffeine intake on collection day can blunt or distort the morning cortisol value
If any of these apply, retest after the situation resolves rather than acting on a single result.
Tracking Over Time
A single day's salivary cortisol can vary meaningfully from the next. Research groups running careful studies often average two or more sampling days to get a reliable picture, and individual day-to-day noise is well documented.
Repeating the panel after a structured change is the cleanest way to know whether the curve is moving. Earlier bedtime, morning daylight, lower afternoon caffeine, treating an underactive thyroid, or completing a stress reduction program are all moves whose effects show up here. Most people benefit from retesting every six to twelve months while making changes, then annually once a stable rhythm is established.
What to Do With Your Results
Different patterns point to different actions. A flat or chronically elevated curve usually means the inputs to your stress system need to change before any supplement matters. Earlier bedtime, daylight exposure within an hour of waking, reduced afternoon caffeine, and a structured wind-down before sleep have the strongest research support for restoring rhythm.
A blunted curve with low DHEA-S deserves a deeper workup. Thyroid function, iron, vitamin D, and depression screening are the highest-yield companion tests. In some cases, this pattern reflects an underlying medical issue such as adrenal insufficiency and warrants endocrinology referral, not self-management.
Low sIgA with an otherwise normal pattern often improves as the broader stress picture improves. Sleep duration, training load, and adequate protein intake are reasonable first targets. Across all patterns, pair these results with how you feel, your sleep data, and bloodwork covering thyroid, blood sugar, and inflammation.