Pregnenolone is the raw material for all other steroid hormones and a brain-active signal in its own right; levels decline with age. Short courses at low doses appear well tolerated, but proof of lasting benefit for memory, mood, stress, or aging in healthy adults is thin and mixed. Long-term safety is unknown. (Full Review)

Protocol

Dose

10–50 mg/day

Some protocols reach 100 mg; research doses up to 500 mg

Timing

Morning

Later dosing can disturb sleep

Form

Sublingual or micronized oral

Used to improve uptake of a poorly absorbed hormone

Time to effect

Clinical benefit

6–8 weeks

Trial outcomes assessed over this window

Cognitive / hormonal

Several weeks

If changes occur

Mood / stimulation

Within days

Earliest noticeable effects

Benefits

Medium: Reduced negative symptoms in serious mental illness

Low: Memory and cognitive performance; mood support in depression; relief of chronic low-back pain

Speculative: Healthy aging and hormonal support; stress resilience and anxiety reduction; neuroprotection and myelination

Contraindications

Hormone-sensitive cancer treatment (aromatase inhibitors, anti-estrogens)

Personal or family history of hormone-sensitive cancers (breast, ovarian, uterine, prostate)

Endometriosis or uterine fibroids

Pregnancy or breastfeeding

Adolescents

Unstable psychiatric condition

Key Interactions

Hormone therapies (estrogen, testosterone, DHEA, progesterone, corticosteroids)

Anticoagulants and antiplatelet drugs (warfarin, apixaban, rivaroxaban)

Hormonal or steroid-containing over-the-counter products and sedating antihistamines

Hormone-support supplements (DHEA, adrenal blends, licorice root)

Calming or GABAergic agents (alcohol, benzodiazepines, valerian, high-dose magnesium)

Risk & Side Effects

Low: Overstimulation and sleep disturbance; androgenic and estrogenic effects; neuropsychiatric effects

Speculative: Stimulation of hormone-sensitive conditions; cardiac arrhythmia and palpitations; unknown long-term safety

Monitoring

Marker	Target	Why
Pregnenolone (serum)	Mid-to-upper reference range for age and sex	Confirms deficiency and tracks response
DHEA sulfate (DHEA-S)	Upper-mid of the age- and sex-specific range	Shows downstream conversion and adrenal output
Total and free testosterone	Youthful-normal range for sex	Detects excess androgen effects
Estradiol	Age- and sex-appropriate range	Detects excess estrogen effects
Morning cortisol	Within the normal diurnal range	Assesses stress-axis balance and the "steal" concept
Fasting lipid panel	Standard optimal targets	Monitors metabolic effects of hormone shifts

Cadence: Baseline, then 4–12 weeks after starting or changing dose, then every 6–12 months

Qualitative Assessment

Sleep quality and ease of falling asleep
Daytime energy and sense of vitality
Mood stability and stress resilience
Memory, focus, and mental clarity
Absence of side effects such as acne, irritability, or palpitations

Pregnenolone for Health & Longevity

Protocol

Benefits

Risk & Side Effects

Monitoring

Qualitative Assessment