The Most Underrated Hormone in Longevity Medicine
DHEA — dehydroepiandrosterone — is produced in greater quantity than almost any other hormone in the human body, yet it remains one of the least discussed in mainstream health conversations. That’s a significant oversight, because DHEA’s decline with aging is among the most dramatic and consistent hormonal changes the body undergoes — and its effects on vitality, immune function, body composition, and longevity are substantial.
What Is DHEA?
DHEA is a steroid hormone produced primarily by the adrenal cortex, with smaller amounts from the gonads and brain. It serves as a precursor to both testosterone and estrogen — the body converts DHEA into sex hormones in peripheral tissues based on local needs. This makes DHEA a kind of hormonal reservoir, feeding into whichever downstream hormones are needed where they’re needed.
DHEA production peaks in the mid-20s — typically around age 25 — and then declines steadily and relentlessly. By age 70, most people have DHEA levels that are 80–90% lower than their peak. This dramatic decline is one of the most consistent biomarkers of biological aging found across human populations. Its measurement as DHEA-S (the sulfated, more stable form) is a standard component of comprehensive hormone panels.
What DHEA Does in the Body
Immune Modulation
DHEA has powerful immune-regulatory effects. It enhances T-cell activity, supports natural killer cell function, and modulates the balance between pro- and anti-inflammatory cytokines. Low DHEA is associated with immune senescence — the progressive deterioration of immune function that accompanies aging and leaves older adults more vulnerable to infections, reduced vaccine efficacy, and increased autoimmune activity. Restoring DHEA to more youthful levels has been shown to improve several markers of immune function in older adults.
Cardiovascular Protection
Multiple observational studies have found an inverse relationship between DHEA-S levels and cardiovascular disease risk in both men and women. DHEA appears to reduce arterial inflammation, improve endothelial function, reduce platelet aggregation, and have favorable effects on lipid profiles. Low DHEA is associated with increased carotid intima-media thickness — an early marker of atherosclerosis — independent of other risk factors.
Cognitive Function
DHEA and its sulfated form DHEA-S are neurosteroids — they’re produced in the brain and have direct effects on neuronal function. DHEA modulates GABA and NMDA receptor activity, supports neuroplasticity and memory consolidation, and has neuroprotective effects against oxidative stress and excitotoxicity. Multiple studies have found associations between higher DHEA-S levels and better cognitive performance, particularly in episodic memory and executive function, in older adults.
Mood and Wellbeing
DHEA has significant effects on mood, motivation, and psychological wellbeing. Randomized controlled trials have demonstrated that DHEA supplementation significantly reduces depressive symptoms — particularly in patients with dysthymia and major depression — with effect sizes comparable to antidepressant medications in some studies. DHEA also appears to improve sense of wellbeing and vitality in older adults with low adrenal function.
Body Composition
Through its downstream conversion to testosterone, DHEA supports lean muscle mass maintenance and fat loss — particularly reduction of visceral fat. Studies have shown that DHEA supplementation in older adults significantly reduces abdominal fat and improves insulin sensitivity, even without changes to diet or exercise habits.
DHEA Supplementation: What the Evidence Shows
DHEA is available as an over-the-counter dietary supplement in the United States (it is regulated as a prescription medication in several other countries, reflecting how seriously it is taken as a hormone). The evidence base for DHEA supplementation is more robust than for many popular wellness supplements. The DHEA and Wellness (DAWN) trial and the Mayo Clinic DHEA aging study both demonstrated significant benefits from DHEA supplementation in older adults with low levels.
Typical supplemental doses range from 25–50 mg daily for women and 50–100 mg daily for men, though individualized dosing based on measured DHEA-S levels and downstream hormone effects is always preferable. DHEA converts to both testosterone and estrogen — women are more sensitive to its androgenic effects at higher doses (which can cause acne and unwanted hair growth), while men metabolize more toward testosterone with less estrogenic conversion.
Who Should Consider DHEA?
Adults over 40 with low or low-normal DHEA-S levels on lab testing, particularly those experiencing fatigue, low mood, reduced libido, impaired immune function, or accelerated body composition changes, are reasonable candidates for a discussion about DHEA supplementation. Testing DHEA-S before supplementing — and rechecking after 6–8 weeks — allows for proper monitoring and dose optimization rather than guesswork.
Like all hormonal interventions, DHEA supplementation should be approached with appropriate clinical oversight, understanding of downstream hormone effects, and regular monitoring. At MultiGen Wellness Institute, DHEA is covered in depth as part of our comprehensive adrenal and hormone optimization training.