This profile is for informational purposes only and is not medical advice. Consult a healthcare professional before use. See full terms.
DHEA (Dehydroepiandrosterone)
The most abundant neurosteroid in the human brain - a precursor to testosterone and oestrogen that declines sharply with age, supporting mood, memory, neuroprotection, and cognitive vitality when supplemented.
Benefits
What is DHEA (Dehydroepiandrosterone)?
DHEA (dehydroepiandrosterone) is a steroid hormone produced primarily by the adrenal glands, and it holds the distinction of being the most abundant circulating steroid hormone in the human body. More relevantly for cognitive function, the brain produces its own DHEA (and its sulphated form DHEA-S) independently of the adrenal glands, making it a true neurosteroid with direct effects on brain function.
DHEA levels peak in the mid-20s and decline by approximately 2-3% per year thereafter, reaching 10-20% of peak levels by age 70. This age-related decline correlates with cognitive decline, mood deterioration, and reduced neuroplasticity. A 2006 meta-analysis published in the Journal of Psychiatry and Neuroscience found that DHEA supplementation improved depressive symptoms, particularly in middle-aged and older adults. A 2003 study in Archives of General Psychiatry demonstrated that 6 weeks of DHEA supplementation (90 mg/day for 3 weeks, then 450 mg/day for 3 weeks) significantly improved depression ratings compared to placebo. In the brain, DHEA modulates GABA-A and NMDA receptors, enhances sigma-1 receptor activity (involved in neuroplasticity), increases IGF-1 levels, and exerts neuroprotective effects against cortisol-induced neurotoxicity. Its role as a precursor to both testosterone and oestrogen means it also supports the cognitive and mood benefits associated with these downstream hormones.
- Neurosteroid activity: Directly modulates GABA-A receptors (reducing inhibition) and NMDA receptors (enhancing excitation), shifting the brain towards a state of greater alertness and plasticity
- Sigma-1 receptor agonism: Activates sigma-1 receptors, which regulate calcium signalling, BDNF release, and neuronal survival - a key mechanism for neuroprotection and mood
- Anti-glucocorticoid effect: Opposes the neurotoxic effects of chronically elevated cortisol, protecting hippocampal neurons from stress-induced damage
- Hormone precursor: Serves as a metabolic precursor to testosterone, oestrogen, and other androgens, indirectly supporting the cognitive and mood benefits of these hormones
- IGF-1 enhancement: Increases insulin-like growth factor 1 levels, which supports neuronal growth, myelination, and synaptic maintenance
- Cognitive and mood dosage: 25-50 mg per day for general supplementation
- Clinical depression studies: Doses of 90-450 mg/day have been used in clinical trials for depression, under medical supervision
- Timing: Take in the morning to align with the natural circadian rhythm of DHEA production
- Blood testing recommended: Measure DHEA-S levels before and during supplementation to ensure levels remain within the healthy range
- Onset: Mood effects may be noticed within 2-3 weeks. Full cognitive and hormonal effects develop over 4-8 weeks
- Hormonal effects: As a steroid hormone precursor, DHEA can increase levels of testosterone and oestrogen. Monitor for androgenic effects (acne, hair growth) in women or oestrogenic effects in men
- Hormone-sensitive conditions: Contraindicated in individuals with hormone-sensitive cancers (breast, prostate, ovarian) or at high risk for them
- Blood testing essential: DHEA-S levels should be monitored to avoid supraphysiological levels. Target age-appropriate ranges, not peak youthful levels
- Drug interactions: May interact with hormone therapies, insulin, and certain psychiatric medications. Consult your doctor before use
- Legal status: Available over-the-counter in the US and UK as a supplement. Prescription-only in some EU countries. Banned by WADA for athletes
Natural Sources & Forms
- Capsules and tablets: Widely available from supplement retailers in 25 mg, 50 mg, and 100 mg dosages
- Micronised DHEA: Micronised formulations may offer improved absorption
- Sublingual tablets: Available for faster absorption and to partially bypass first-pass liver metabolism
- 7-Keto DHEA: A metabolite of DHEA that does not convert to sex hormones - an alternative for those wanting DHEA benefits without hormonal effects
Frequently Asked Questions
The most abundant neurosteroid in the human brain - a precursor to testosterone and oestrogen that declines sharply with age, supporting mood, memory, neuroprotection, and cognitive vitality when supplemented.
The key benefits of DHEA (Dehydroepiandrosterone) include: Energy, Libido, Longevity, Memory, Mood, Stress Relief.
Neurosteroid activity: Directly modulates GABA-A receptors (reducing inhibition) and NMDA receptors (enhancing excitation), shifting the brain towards a state of greater alertness and plasticity Sigma-1 receptor agonism: Activates sigma-1 receptors, which regulate calcium signalling, BDNF release, and neuronal survival - a key mechanism for neuroprotection and mood Anti-glucocorticoid effect: Opposes the neurotoxic effects of chronically elevated cortisol, protecting hippocampal neurons from stress-induced damage Hormone precursor: Serves as a metabolic precursor to testosterone, oestrogen, and other androgens, indirectly supporting the cognitive and mood benefits of these hormones IGF-1 enhancement: Increases insulin-like growth factor 1 levels, which supports neuronal growth, myelination, and synaptic maintenance
Cognitive and mood dosage: 25-50 mg per day for general supplementation Clinical depression studies: Doses of 90-450 mg/day have been used in clinical trials for depression, under medical supervision Timing: Take in the morning to align with the natural circadian rhythm of DHEA production Blood testing recommended: Measure DHEA-S levels before and during supplementation to ensure levels remain within the healthy range Onset: Mood effects may be noticed within 2-3 weeks. Full cognitive and hormonal effects develop over 4-8 weeks
Hormonal effects: As a steroid hormone precursor, DHEA can increase levels of testosterone and oestrogen. Monitor for androgenic effects (acne, hair growth) in women or oestrogenic effects in men Hormone-sensitive conditions: Contraindicated in individuals with hormone-sensitive cancers (breast, prostate, ovarian) or at high risk for them Blood testing essential: DHEA-S levels should be monitored to avoid supraphysiological levels. Target age-appropriate ranges, not peak youthful levels Drug interactions: May interact with hormone therapies, insulin, and certain psychiatric medications. Consult your doctor before use Legal status: Available over-the-counter in the US and UK as a supplement. Prescription-only in some EU countries. Banned by WADA for athletes
Overall Rating
Log in to rate this nootropic.
Comments
Log in to leave a comment.
No comments yet. Be the first to share your experience!