Feeling exhausted, losing interest in things that used to bring joy, or noticing a dip in energy that sleep does not fix? Low DHEA-S could be a factor worth exploring. DHEA-S (dehydroepiandrosterone sulfate) is a hormone produced primarily by the adrenal glands, and it plays a bigger role in women's health than most people realize.

What is DHEA-S, and why does it matter?

DHEA-S is the most abundant circulating steroid hormone in the body. The adrenal glands produce it, and the body converts it into estrogen and testosterone as needed. DHEA-S levels naturally peak in the mid-20s and gradually decline with age.

For women, DHEA-S supports bone density, immune function, mood, energy, and sexual health. When levels drop too low, the effects can be widespread and easy to mistake for general aging or stress.

The brain's hypothalamus and pituitary gland regulate adrenal function, meaning that hormonal shifts start in the brain before they show up as changes in the body. Understanding how the brain controls hormones helps frame why adrenal health is a brain health issue.

Signs of low DHEA in women

Low DHEA can overlap with many other conditions, which is one reason the signs are frequently overlooked. Common ones include the following.

Persistent fatigue

Feeling tired even after a full night of sleep is one of the most reported effects of low DHEA. The fatigue tends to feel heavy and does not improve much with rest, caffeine, or changes in routine.

Low mood or depression

DHEA-S supports neurotransmitter function, including serotonin and dopamine pathways. When levels are low, mood can suffer. You might describe it as a flatness or emotional numbness rather than typical sadness.

Decreased libido

Because the body uses DHEA-S to produce both estrogen and testosterone, low levels can reduce sexual desire and arousal. You may notice a gradual decline rather than a sudden change.

Dry skin and thinning hair

DHEA-S contributes to sebum production and hair growth. Low levels can lead to noticeably drier skin, a lackluster complexion, and hair thinning, particularly around the temples and crown.

Reduced muscle mass and bone density

DHEA-S supports the maintenance of lean muscle tissue and strong bones. Over time, low levels may contribute to muscle weakness, increased body fat, and a higher risk of osteoporosis.

Brain fog and difficulty concentrating

Cognitive changes, including brain fog, forgetfulness, and trouble focusing, are common with low DHEA-S. You might describe it as thinking through a haze or losing words mid-sentence.

Weakened immune function

Frequent colds, slow healing, or feeling run-down may signal that low DHEA-S is affecting immune resilience.

What causes low DHEA levels in women?

Several factors contribute to declining DHEA-S levels.

Aging: DHEA-S declines naturally starting around age 30, and by menopause, levels may be 50% to 80% lower than peak values.

Chronic stress: Prolonged cortisol production from stress can deplete DHEA-S, since both are produced by the adrenal glands.

Adrenal insufficiency: Conditions affecting the adrenal glands directly reduce DHEA-S production.

Medications: Certain drugs, including corticosteroids and some hormonal therapies, may lower DHEA-S.

Poor nutrition: Deficiencies in key nutrients like vitamin D, magnesium, and healthy fats can impair adrenal function.

Women in perimenopause or menopause experience an overlap between declining estrogen and declining DHEA-S, which can amplify experiences like fatigue, mood changes, and cognitive difficulty. Tracking what you notice alongside cycle changes can help identify patterns.

How is low DHEA-S diagnosed?

A simple blood test measures DHEA-S levels. Normal ranges vary by age, but general reference ranges for women are roughly 35 to 430 micrograms per deciliter, with lower values expected in older women.

If your experiences suggest low DHEA-S, a healthcare provider may also test cortisol, thyroid hormones, estrogen, testosterone, and other markers to get a complete picture.

What can help with low DHEA?

Supporting the body holistically is the most practical starting point.

1. Stress management reduces cortisol levels, allowing the adrenal glands to allocate more resources to DHEA-S production. Brain-supporting practices like meditation and breathwork can help regulate the stress response.
2. Regular exercise, especially resistance training, supports muscle mass, bone density, and hormonal balance.
3. Sleep optimization gives the adrenal glands time to recover and produce hormones effectively.
4. Nutrient-dense eating with adequate healthy fats, zinc, magnesium, and B vitamins supports adrenal health. Phase-specific nutrition can layer additional support on top of a solid dietary foundation.
5. A brain-first approach to cycle wellness can complement these habits by supporting the nervous system through hormonal transitions.

DHEA supplementation is available over the counter in the United States, but dosing matters. Too much DHEA can cause side effects, including acne, hair growth, and hormonal imbalance. Always consult a healthcare provider before starting supplementation.

Low DHEA does not have to define how you feel

If these signs sound familiar, a conversation with a healthcare provider and a simple blood test can bring clarity. Low DHEA-S is treatable, and even targeted changes, like reducing caffeine to lower cortisol, adding resistance training twice a week, or starting a 10-minute daily breathwork practice, can support adrenal recovery over time.

For women still experiencing cyclical changes, Samphire Neuroscience takes a brain-first approach to hormonal health. Nettle™, a CE-marked Class IIa medical device available in the UK and EU, uses non-invasive brain stimulation to support pain management and mood regulation across the cycle. For women in the US and globally, Lutea™ is a general wellness device designed to support focus, emotional balance, and wellbeing throughout every phase, including the perimenopausal years.