Can low adrenal DHEA-S be associated with lower downstream androgen markers in women?

The role of adrenal dehydroepiandrosterone (DHEA) and its sulfate ester (DHEA-S) as precursors for sex steroids is a foundational concept in female endocrinology, particularly as women age. The following assessment outlines the mechanisms of this conversion and the clinical implications of low precursor levels.

Mechanistic pathways of intracrinology

In women, the adrenal glands provide a massive circulating reservoir of DHEA and DHEA-S. These precursors are converted into active hormones within peripheral tissues—such as the skin, bone, and adipose tissue—through a process called intracrinology.

• Androgen Synthesis: DHEA is converted to androstenedione by the enzyme 3β-hydroxysteroid dehydrogenase (3β-HSD). Androstenedione is then transformed into testosterone by 17β-hydroxysteroid dehydrogenase (17β-HSD).
• Estrogen Synthesis: Testosterone and androstenedione serve as substrates for the enzyme aromatase (CYP19A1), which converts them into estrogens like estradiol and estrone.
• Postmenopausal Significance: In postmenopausal women, adrenal precursors become the near-exclusive source of sex steroids. Approximately 100% of estrogens and 40% of androgens in this demographic are derived from peripheral conversion of adrenal DHEA.

Clinical evidence and androgen markers

While the biochemical pathway is well-established, the relationship between circulating DHEA-S and downstream markers is characterized by high individual variability.

• Correlation with Androgens: Low DHEA-S levels are mechanistically linked to lower downstream androgen markers because the substrate pool for conversion is reduced. Clinical studies of adrenal insufficiency demonstrate that low adrenal output consistently results in lower overall androgen markers.
• Impact of Supplementation: Research shows that exogenous DHEA supplementation increases both DHEA-S and testosterone levels in women, further confirming the metabolic link between these markers.
• Non-linear Relationships: The association is not always a simple 1:1 correlation. During the menopausal transition, estradiol levels drop precipitously while DHEA-S declines more gradually. Furthermore, local tissue enzyme activity (e.g., aromatase or 17β-HSD levels) can influence how much testosterone or estrogen is produced regardless of the circulating DHEA-S concentration.

Bottom line

Adrenal DHEA-S is the fundamental precursor for peripheral testosterone and estrogen production in women. While low DHEA-S is mechanistically and clinically associated with lower downstream androgen markers, the final concentration of active hormones also depends heavily on tissue-specific enzyme activity.