Saliva Cortisone Total (S1 - 5)

Your body's stress hormone follows a rhythm. It surges shortly after you wake up, drops through the morning, settles low by evening, and reaches its quietest point around midnight. A single blood draw captures one frame of that rhythm. Five saliva samples taken at fixed points across the day capture the whole pattern.

Salivary cortisone is the chemically inactive form of cortisol that your salivary glands produce locally, and it tracks the unbound, biologically active fraction of cortisol circulating in your blood. A multi-point profile is the most direct way to see whether your stress axis is firing too hard, too softly, or out of phase with the clock.

What This Test Actually Measures

Cortisol is the hormone your adrenal glands release in response to stress, blood sugar shifts, and the daily wake-sleep cycle. Most cortisol in your blood is bound to carrier proteins and is not biologically active. Only the unbound free fraction can enter cells and do work.

When free cortisol passes into your saliva, the enzyme in your salivary glands converts most of it to cortisone, the inactive cousin of cortisol. Measuring salivary cortisone gives a clean read on free cortisol exposure that is not distorted by changes in blood-binding proteins. The S1 through S5 protocol typically captures samples at waking, mid-morning, midday, late afternoon, and bedtime, building a curve rather than a single dot.

Why a Five-Point Curve Matters

Cortisone is not a number that means the same thing all day. In a study of 20 healthy adults sampling six times per day over five days, the within-person variability of salivary cortisone ranged roughly 19 to 49 percent depending on the time point. Between-person variability ran 29 to 44 percent. A morning sample and an evening sample are essentially measuring two different physiological events.

A normal adrenal axis shows a sharp rise within 30 minutes of waking, a steady decline through the day, and a low trough at bedtime. Flattening, blunting, or elevation of any segment of that curve carries different clinical meaning than a single high or low value would suggest in isolation.

Screening for Underactive Adrenals

If your adrenal glands are not producing enough cortisol, your morning level fails to rise normally. In a study of 220 high-risk patients, a single home waking salivary cortisone sample distinguished people with adrenal insufficiency from healthy controls with an area under the curve of 0.95, a measure of test accuracy where 1.0 is perfect.

At optimized cutoffs, both the negative and positive predictive values reached approximately 95 percent, meaning the test correctly classified about 95 out of 100 people in either direction. Roughly 70 percent of patients got diagnostic information from the home saliva test that was equivalent to an in-hospital ACTH stimulation test (a procedure where adrenal hormone is injected to provoke a cortisol response). Most preferred the home collection.

Detecting Cortisol Excess

Sustained high cortisol drives weight gain around the midsection, high blood pressure, blood sugar problems, muscle loss, and bone thinning. The clinical name for severe excess is Cushing's syndrome, but milder forms of cortisol overproduction can damage your health long before they meet that threshold.

In 173 adults with adrenal incidentalomas (small adrenal masses found by accident on imaging), salivary cortisone after an overnight dexamethasone suppression test correlated with serum cortisol at 0.95, a near-perfect statistical link where 1.0 would be identical movement. A cutoff of 2.7 nmol/L caught about 85 out of 100 cases of inadequate suppression and correctly cleared about 92 out of 100 healthy people. Late-night salivary cortisone has also been studied as a screening tool for suspected hypercortisolism.

The Awakening Response

Within 15 to 30 minutes of waking, your cortisol surges by roughly half. This burst, called the awakening response, helps you transition from sleep to active alertness. In healthy adults studied with 15-minute saliva sampling, salivary cortisone showed a clear rise of about 49 percent in the first 30 minutes after waking, mirroring the cortisol awakening response measured in serum.

Several measures of the cortisone awakening response correlated with serum cortisol awakening dynamics, suggesting cortisone may be at least as informative as cortisol for tracking what your stress axis does in the first hour of your day. A blunted or absent awakening response has been studied as a marker of burnout, chronic stress, and depression in research settings, though standardized clinical cutoffs do not yet exist.

Reference Ranges

Salivary cortisone is a Tier 3 marker. There are no universal clinical cutoffs the way there are for cholesterol or HbA1c (a long-term blood sugar measure). Published values come from individual studies using LC-MS/MS (a precision lab technique that separates and identifies molecules) and vary by lab, assay, and time point. The values below are illustrative orientation drawn from research, not universal targets, and your lab will likely report different numbers.

Compare your results within the same lab over time for the most meaningful trend. A change of 55 to 194 percent at any given time of day is roughly the threshold required to exceed normal biological and analytical noise, based on reference change values calculated in a healthy adult cohort. Smaller shifts may not reflect true biological change.

When Results Can Be Misleading

• Glucocorticoid medications: inhaled steroids for asthma and especially systemic glucocorticoids substantially lower morning salivary cortisol, and by extension cortisone, in a dose-dependent way. The drop reflects pharmacological suppression of your own adrenal output, not adrenal disease, but the test cannot tell the difference while you are taking the medication.
• Sample contamination and timing errors: food, blood from gum bleeding, brushing your teeth shortly before collection, or sampling at the wrong time relative to waking can shift values. The awakening response in particular is highly time-sensitive, and a sample taken 60 minutes after waking versus 30 will give a different number.
• Behavioral state on collection day: sleep duration, working day versus weekend, smoking, and alcohol use have all been shown to influence cortisone awakening indices. Collecting samples on a typical day rather than an unusual one improves interpretability.
• Oral contraceptives: estrogen-containing pills raise total cortisol in blood by increasing carrier proteins, but they have minimal impact on salivary cortisone because saliva captures the free fraction. This is actually an advantage of the saliva test, not a limitation.

Tracking Your Trend

Salivary cortisone has high biological variability. Reference change values of 55 to 194 percent quantify how much a single reading can swing for reasons unrelated to your underlying stress axis. One day's profile is a snapshot, not a verdict.

If you are establishing a baseline, consider a five-point profile over two non-consecutive days within the same week. If you are testing the effect of an intervention like sleep changes, a stress-management practice, or treatment for an adrenal condition, retest in 8 to 12 weeks under similar collection conditions, then at least annually if you are stable. Hold the time of waking, the timing of each sample, and the surrounding behavior as constant as possible across collections.

What to Do With an Abnormal Result

If your waking value is unusually low or your awakening response is flat or absent, the next step is confirmatory testing for adrenal insufficiency. A serum ACTH stimulation test remains the standard, and an endocrinologist is the right specialist. If your bedtime values are persistently elevated or your post-dexamethasone cortisone is high, the workup shifts toward cortisol excess and Cushing's evaluation, which typically involves 24-hour urinary free cortisol, low-dose dexamethasone testing, and adrenal imaging.

If your profile is mildly disrupted but does not meet diagnostic thresholds for either disease, that pattern is harder to interpret in clinical terms but still informative. It can flag chronic stress load, disrupted sleep architecture, or shift-work effects that warrant lifestyle attention even though no disease is present. Repeat the test before drawing conclusions, and pair it with related markers such as DHEA-S (a long-term adrenal output marker) and morning serum cortisol for triangulation.