DHEA (Dehydroepiandrosterone) vs Pregnenolone

Mechanism

DHEA is the most abundant circulating steroid hormone, produced primarily by the adrenal zona reticularis. It serves as a precursor for both androgens (testosterone, DHT via 3beta-HSD and 17beta-HSD) and estrogens (estradiol, estrone via aromatase). DHEA-S (sulfated form) acts as a neurosteroid, positively modulating NMDA receptors and antagonizing GABA-A receptors (cognitive enhancement/alertness). It also modulates immune function (enhances Th1 immunity, IL-2 production), supports bone mineral density via estrogenic metabolites, enhances insulin sensitivity via PPAR-alpha activation, and opposes cortisol's catabolic effects (DHEA:cortisol ratio is a stress/aging biomarker).

Standard Dosing

25-50mg daily (men); 10-25mg daily (women)

Timing

Morning (mimics natural circadian peak). With food.

Cycle Duration

Ongoing under supervision with regular blood monitoring (DHEA-S, testosterone, estradiol, PSA in men)

Side Effects

• Acne (androgenic)
• Hair loss (androgenic)
• Hirsutism in women
• Mood changes (irritability, aggression)
• Deepening of voice in women (at high doses)
• Insomnia
• Oily skin

Contraindications

• Hormone-sensitive cancers (prostate, breast, ovarian)
• PCOS (may worsen androgen excess)
• Endometriosis
• Uterine fibroids
• Children/adolescents

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Mechanism

Pregnenolone is the 'master steroid' synthesized from cholesterol via CYP11A1 (side-chain cleavage enzyme) in adrenal glands, gonads, and brain. It serves as the biosynthetic precursor to all steroid hormones (progesterone, DHEA, cortisol, testosterone, estradiol, aldosterone). In the CNS, pregnenolone and its sulfated derivative (pregnenolone sulfate) function as potent neurosteroids: pregnenolone sulfate is a positive allosteric modulator of NMDA receptors enhancing glutamatergic neurotransmission, a negative modulator of GABA-A receptors (increasing neural excitability), and an activator of TRPM3 calcium channels. It also modulates sigma-1 receptors involved in neuroplasticity.

Standard Dosing

Research indicates 10-50 mg daily orally for neurosteroid and cognitive support. Clinical trials in schizophrenia used up to 500 mg/day.

Timing

Morning dosing preferred (aligns with diurnal cortisol rhythm). Sublingual may provide faster onset and better bioavailability. Take with or without food.

Cycle Duration

Ongoing with periodic reassessment. Cycle 5 days on / 2 days off, or 3-4 weeks on / 1 week off to prevent downstream hormone accumulation.

Side Effects

• Headache
• Irritability/mood changes
• Insomnia
• Acne (via androgenic metabolites)
• Heart palpitations
• Hair loss (if converting heavily down androgen pathway)
• Overstimulation
• Overstimulation and anxiety (from GABA-A antagonism at higher doses)
• Insomnia (if taken late in the day)
• Acne (from downstream androgen conversion)
• Irritability
• Hair growth or loss (from downstream hormonal changes)

Contraindications

• Hormone-sensitive cancers
• Seizure disorders (complex GABA modulation)
• Pregnancy
• PCOS
• Concurrent HRT without monitoring
• Use only with lab-guided supervision
• Hormone-sensitive cancers (breast, prostate, ovarian — due to downstream conversion)
• History of seizures (pregnenolone sulfate is pro-excitatory)
• Pregnancy and breastfeeding
• Bipolar disorder (may exacerbate manic episodes)

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