Cortisol DHEA Ratio: A Guide to Hormone Balance Testing

Key takeaways

• The cortisol DHEA ratio compares a stress-related glucocorticoid with a hormone that serves as a precursor to sex steroids.
• Both cortisol and DHEA are produced by the adrenal glands and follow a diurnal pattern, so timing of sample collection matters.
• The ratio is a calculated value, not a standalone diagnosis; it must be interpreted alongside symptoms, medical history, and other tests.
• Many factors, including age, time of day, medications, and acute illness, can shift cortisol or DHEA levels independently.
• Reference ranges vary by laboratory, sample type (serum, saliva, or urine), and the units reported, so results are not interchangeable across labs.

What the Cortisol DHEA Ratio Measures

The cortisol DHEA ratio is a mathematical comparison of two adrenal steroid hormones. Cortisol is the body's primary glucocorticoid and helps mobilize glucose, modulate inflammation, and support the stress response. DHEA and its sulfated form, DHEA-S, are androgen precursors that the body converts into sex hormones. Because both are synthesized in the adrenal cortex, measuring them together can give a broader picture of adrenal steroid output than either value alone.

The ratio is typically reported as cortisol divided by DHEA or DHEA-S, or sometimes the reverse, depending on the laboratory. This matters because a ratio of 10:1 is not the same as 1:10. When reviewing results, always confirm which hormone is the numerator and which is the denominator. The ratio is a derived number, so its usefulness depends on the accuracy and timing of the underlying cortisol and DHEA measurements.

How Cortisol and DHEA Are Produced and Regulated

Both hormones originate in the adrenal cortex under the influence of adrenocorticotropic hormone (ACTH) from the pituitary gland. Cortisol production follows a strong circadian rhythm, peaking in the early morning and declining through the day. DHEA and DHEA-S also show a daily pattern, though DHEA-S is longer-lived and tends to be more stable in circulation, which is why some clinicians prefer it for a single measurement.

The adrenal glands also produce aldosterone, androgens, and catecholamines, so changes in one pathway can affect others. Chronic stress, illness, or medications that alter ACTH or cortisol production may shift the ratio. Because regulation is complex and involves the hypothalamus, pituitary, and adrenal axis, a single ratio value should be interpreted as one piece of a larger clinical picture rather than a definitive answer.

Factors That Can Influence the Ratio

Age is a major influence. DHEA and DHEA-S levels decline steadily after the third decade of life, while cortisol patterns can also change with age. As a result, the ratio naturally shifts over time. Time of day, sleep quality, recent exercise, acute illness, and psychological stress can all affect cortisol concentrations and, to a lesser degree, DHEA levels.

Medications and health conditions also matter. Glucocorticoid medications can suppress endogenous cortisol and alter adrenal output. Conditions affecting the adrenal glands, pituitary, or hypothalamus may change one or both hormones. Sample type is another variable: serum, saliva, and urine measure different fractions of hormones, and results from one method are not directly comparable to another. Reference ranges are method-specific and should always come from the performing laboratory.

Interpreting Results With Your Clinician

A cortisol DHEA ratio result is most useful when paired with a careful history and, when appropriate, additional testing. Clinicians may consider symptoms such as fatigue, changes in weight, mood, sleep, or menstrual patterns, along with physical examination and other laboratory studies. The ratio alone cannot confirm or rule out a specific diagnosis, and it should not be used to self-diagnose or self-treat.

If you receive a ratio result, ask which hormones were measured, what units and sample type were used, and what reference range applies. Discuss whether repeat or confirmatory testing is warranted, especially if results seem inconsistent with how you feel. Any decision about medication, supplements, or further evaluation should be made with a licensed healthcare professional who can interpret the full context of your health.

Frequently Asked Questions

Sources

• MedlinePlus: DHEA sulfate test
• MedlinePlus: Cortisol test
• National Institute of Diabetes and Digestive and Kidney Diseases: Adrenal Insufficiency and Addison's Disease
• National Center for Biotechnology Information: Physiology, Cortisol
• Office of Dietary Supplements: DHEA fact sheet