Can low DHEA-S contribute to low testosterone in women?

In women, the production of testosterone is a complex process involving both direct secretion from the ovaries and the peripheral conversion of adrenal-derived precursors. Dehydroepiandrosterone sulfate (DHEA-S) is the most abundant adrenal precursor and plays a vital role in maintaining androgen levels throughout a woman’s life.

Clinical and effectiveness evidence

The link between DHEA-S and testosterone is clinically well-established, particularly through supplementation studies.

• Supplementation Effects: Meta-analyses of randomized controlled trials (RCTs) involving women have shown that DHEA supplementation consistently raises serum testosterone levels. One meta-analysis reported a Weighted Mean Difference (WMD) of 30.98 ng/dL in testosterone levels following DHEA administration.
• Adrenopause and Aging: DHEA-S levels naturally decline with age—a process known as adrenopause. Because DHEA-S provides the raw material for roughly 50% of a woman's total testosterone (and nearly 100% after menopause), this age-related drop in DHEA-S is a primary driver of low testosterone in older women.
• Population Studies: Research in specific clinical groups, such as women with diminished ovarian reserve, shows that raising DHEA-S levels through supplementation directly correlates with significant increases in circulating testosterone.

Mechanistic explanations

The relationship is governed by the "intracrine" system, where peripheral tissues convert inactive precursors into active hormones.

• Adrenal Specialization: DHEA-S is synthesized almost exclusively (95–100%) in the zona reticularis of the adrenal cortex. This layer expresses specific enzymes like SULT2A1, which sulfates DHEA into its stable DHEA-S form.
• Precursor Reservoir: Unlike DHEA, which has a short half-life, DHEA-S is a large, stable reservoir. It is mobilized by the enzyme steroid sulfatase (STS) in peripheral tissues like the skin, brain, and adipose tissue.
• Enzymatic Conversion: Once converted back to DHEA, it is transformed into androstenedione by 3β-HSD and then into testosterone by 17β-HSD. If the initial DHEA-S pool is low, these downstream enzymes lack the substrate necessary to maintain optimal testosterone production.

Bottom line

DHEA-S is the primary reservoir for androgen production in women; low levels of this adrenal precursor reduce the available substrate for peripheral conversion, directly contributing to low testosterone levels.