Can low DHEA-S cause low testosterone and estradiol when gonadotropin drive is low?

Dehydroepiandrosterone (DHEA) and its sulfate (DHEA-S) function as essential prohormone reservoirs. In peripheral tissues, they are converted into active sex steroids, a process that becomes critically important when primary gonadal production is diminished.

Clinical and mechanistic evidence

DHEA and DHEA-S serve as the primary substrates for "intracrine" hormone production. Unlike hormones released directly from glands, these precursors are converted into active androgens and estrogens within peripheral target tissues.

• Conversion Pathway: DHEA is converted into androstenedione by the enzyme 3β-hydroxysteroid dehydrogenase (3β-HSD). Androstenedione is then converted into testosterone by 17β-HSD. In tissues expressing aromatase (such as adipose, bone, and skin), these androgens are further metabolized into estradiol.
• Impact of Low DHEA-S: Because DHEA-S is the most abundant circulating steroid precursor, its deficiency directly limits the "fuel" available for local testosterone and estradiol synthesis. In women, up to 50% of lung androgens and nearly all estrogens after menopause are derived from these adrenal precursors.
• Synergy with Low Gonadotropin Drive: When gonadotropin drive (LH/FSH) is low—as seen in hypogonadotropic hypogonadism or hypopituitarism—the ovaries produce minimal testosterone and estradiol. In these states, the body relies more heavily on the peripheral conversion of adrenal DHEA-S to maintain sex-steroid levels. If DHEA-S is also low, this compensatory pathway fails, resulting in severe systemic hypoandrogenism and hypoestrogenism.

Clinical implications for women

For women in their 40s, DHEA-S levels naturally begin to decline (adrenopause). When this decline is paired with low gonadotropin drive, the clinical effects are often more pronounced than in isolated ovarian or adrenal insufficiency.

• Ovarian Function: Low DHEA-S may impair "androgen priming" in the ovaries. Local androgens are required to upregulate FSH receptors on follicles; without sufficient DHEA as a substrate, the ovaries may become less responsive to what little gonadotropin drive remains.
• Diagnostic Markers: Clinical studies using high-sensitivity LC-MS/MS have shown that in women with pituitary-adrenal axis dysfunction, DHEA-S levels are highly predictive of total androgen status.

Bottom line

DHEA is a critical precursor for peripheral testosterone and estradiol production. When central gonadotropin drive is low, a concurrent low DHEA-S level eliminates the primary remaining source of sex steroids, leading to significantly depleted testosterone and estradiol levels.