What is DHEA-S?
DHEA-S (dehydroepiandrosterone sulfate) is a hormone produced by your adrenal glands — the small glands that sit on top of your kidneys. It's often called the "mother hormone" because your body uses it as a building block to make other hormones, including (estrogen) and testosterone.
DHEA-S is the most abundant hormone in your bloodstream and plays a supporting role in energy, immune function, mood, and tissue repair. The "S" stands for sulfate — it's the stored form of DHEA that circulates in your blood and is easy to measure with a simple test.
Why it matters for longevity
Here's the key thing about DHEA-S: it peaks in your mid-20s and then declines steadily — dropping by about 2–3% every year after age 30. By the time you reach your 70s, your DHEA-S may be only 10–20% of what it was at its peak. This steep decline is one of the most consistent hormonal changes associated with aging.
Longevity researchers have found that people with higher DHEA-S levels for their age tend to have better cardiovascular health, stronger immune function, more lean muscle mass, and lower rates of age-related diseases. Some researchers even use DHEA-S as one of the markers in calculations.
For women specifically, DHEA-S matters because it's a key source of estrogen after menopause, when the ovaries stop producing it directly. Maintaining healthy DHEA-S levels may help support bone density, skin health, and energy as you age.
What the numbers mean
The conventional reference range for DHEA-S is broad:
- Women (ages 18–39): 145–395 ug/dL
- Women (ages 40–49): 110–370 ug/dL
- Women (ages 50–59): 50–290 ug/dL
- Women (ages 60+): 35–200 ug/dL
The general range of 35–430 ug/dL is used, but optimal levels depend heavily on your age. Longevity-focused practitioners generally aim for the upper quartile of the range for your age group — not the highest possible, but comfortably in the upper portion. A level that would be perfectly healthy at 55 might be a red flag at 30.
What affects your DHEA-S
- Age: This is the biggest factor. The decline begins around 30 and is steady and predictable. You can't stop it entirely, but you can influence how fast it drops.
- Chronic stress: Your adrenal glands make both DHEA-S and cortisol. When you're under constant stress, your body prioritizes cortisol production — sometimes at the expense of DHEA-S. This is sometimes called "the cortisol steal" or pregnenolone steal.
- Sleep quality: Poor sleep disrupts adrenal function and can accelerate the decline of DHEA-S. Your adrenals recover during deep sleep.
- Exercise: Regular moderate exercise supports healthy adrenal function. However, overtraining without proper recovery can stress the adrenals and lower DHEA-S.
- Body composition: Higher muscle mass and lower visceral fat are associated with healthier DHEA-S levels.
- Nutrient status: Vitamins C and B5 (pantothenic acid), magnesium, and healthy fats all support adrenal hormone production.
How to get tested
DHEA-S is measured through a simple blood test that does not require fasting. Unlike many hormones, DHEA-S levels are relatively stable throughout the day and don't fluctuate with your menstrual cycle, making it one of the easier hormones to test accurately. Most doctors can order it, or you can use online lab services. Testing once a year is usually sufficient for tracking your trend over time.
How to improve it
- Manage stress aggressively. Since cortisol and DHEA-S share the same raw materials, reducing chronic stress is one of the most important things you can do. Meditation, nature walks, and saying no to overcommitment all protect your adrenal reserves.
- Prioritize deep sleep. Your adrenals recharge overnight. Aim for 7–9 hours of quality sleep and consistent bedtimes. Use our Sleep Calculator to find your ideal schedule.
- Exercise regularly, but recover well. Strength training and moderate cardio support adrenal health. Avoid chronic overtraining. Check your Fitness Age to see how your fitness level compares to your biological years.
- Support your adrenals nutritionally. Eat enough healthy fats (avocado, olive oil, nuts), get adequate vitamin C from fruits and vegetables, and consider a magnesium supplement if your levels are low.
- Talk to your doctor about supplementation. DHEA supplements are available over the counter, but they are hormones and should not be taken without medical guidance. Over-supplementing can lead to unwanted side effects, especially in women (such as acne or hair changes). Always test first and work with a provider who can monitor your levels.