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Pregnenolone — SacredBod supplement bottle (illustrative)
Supplement · Hormone Precursor

Pregnenolone

10 mg · gluten-free · 180 caps

Brain fogMemory declineLow moodMental fatigueCognitive agingStress-related cognitive impairment BrainAdrenal glandsLiverReproductive system
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Overview Stacks Timing Related Research FAQs

What it is

Pregnenolone is a C21 steroid and the biochemical precursor to all other steroid hormones — including progesterone, cortisol, aldosterone, DHEA, testosterone and estradiol. Synthesised from cholesterol in the mitochondria, it is also classified as a neurosteroid because it is produced de novo in the brain and modulates neuronal excitability. Pregnenolone and its sulfate ester (PREG-S) act as positive allosteric modulators of NMDA receptors and negative modulators of GABA-A receptors, influencing memory, mood and neuroplasticity.

How it works

Pregnenolone sulfate enhances NMDA receptor function and long-term potentiation (LTP), the cellular basis of memory. It increases acetylcholine release in the hippocampus and cortex, supporting cholinergic neurotransmission. In DAT knockout mice (a model of ADHD and mania), pregnenolone normalised hyperactivity and reduced impulsivity. It also stimulates microglial autophagy, reduces neuroinflammation and promotes remyelination in models of multiple sclerosis. Low pregnenolone levels are associated with cognitive decline in ageing and bipolar disorder.

Who should take it

Adults experiencing mild cognitive decline, brain fog or low mental clarity. Those with age-related memory concerns. Some individuals with mood disorders (bipolar depression) have been studied under psychiatric supervision. Athletes and biohackers interested in neurosteroid optimisation. Not a replacement for hormone replacement therapy.

Avoid / careful

Pregnant and breastfeeding women. Individuals with hormone-sensitive cancers (breast, prostate, ovarian). Those with bipolar disorder or seizure disorders (neurosteroid modulation may destabilise mood or lower seizure threshold). Children and adolescents. Not for use as a steroid hormone replacement without endocrinological supervision. Side effects: Generally well-tolerated at 10–30 mg/day. Higher doses may cause irritability, anxiety, insomnia or acne (androgenic conversion). May cause headache or dizziness in sensitive individuals. Rare reports of heart palpitations at high doses.

When to take it

Morning
Noon
Evening
Night

How to take it

With food
Empty stomach
Before food

FAQs

Frequently asked

How long before I see results?
Mood and mental clarity improvements may be noticed within 2–4 weeks. Memory and cognitive benefits require 4–8 weeks. The schizophrenia trial used 4 weeks for measurable PANSS score improvements.
Will it increase my testosterone or estrogen?
Pregnenolone is the precursor to all steroid hormones, but the body tightly regulates conversion via enzyme expression in target tissues. At 10–30 mg/day, significant androgenic or estrogenic conversion is unlikely in most adults. At higher doses (100+ mg), conversion to downstream hormones becomes more probable.
Can I take it with DHEA?
Not recommended without medical supervision. Both are steroid precursors competing for the same biosynthetic pathway. Stacking may lead to unpredictable hormone profiles and androgenic side effects.

In plain English

A plain-English read of the literature behind this supplement. Not a clinical recommendation.

Key citations: PMID 3427920 (schizophrenia RCT, n=see study), PMID 3519851 (DAT KO mouse hyperactivity normalisation), PMID 9758222 (acetylcholine release enhancement), PMID 11744095 (memory and aging review)

Editorial notes

SacredBod's longer take on Pregnenolone — context the structured blocks above don't capture.

What It Is

Pregnenolone is a C21 steroid and the biochemical precursor to all other steroid hormones — including progesterone, cortisol, aldosterone, DHEA, testosterone and estradiol. Synthesised from cholesterol in the mitochondria, it is also classified as a neurosteroid because it is produced de novo in the brain and modulates neuronal excitability. Pregnenolone and its sulfate ester (PREG-S) act as positive allosteric modulators of NMDA receptors and negative modulators of GABA-A receptors, influencing memory, mood and neuroplasticity.

How It Works

Pregnenolone sulfate enhances NMDA receptor function and long-term potentiation (LTP), the cellular basis of memory. It increases acetylcholine release in the hippocampus and cortex, supporting cholinergic neurotransmission. In DAT knockout mice (a model of ADHD and mania), pregnenolone normalised hyperactivity and reduced impulsivity. It also stimulates microglial autophagy, reduces neuroinflammation and promotes remyelination in models of multiple sclerosis. Low pregnenolone levels are associated with cognitive decline in ageing and bipolar disorder.

Who Should Consider It

Adults experiencing mild cognitive decline, brain fog or low mental clarity. Those with age-related memory concerns. Some individuals with mood disorders (bipolar depression) have been studied under psychiatric supervision. Athletes and biohackers interested in neurosteroid optimisation. Not a replacement for hormone replacement therapy.

Dosage Guide

Typical dose: 10 mg per day

Form: capsules (180 count)

Best time: morning

With food: with-food

Expected onset: 2–4 weeks for mood; 4–8 weeks for cognitive benefits

Cycling: Some practitioners recommend cycling (3 weeks on, 1 week off) to prevent receptor downregulation, though evidence is limited.

Safety & Side Effects

Known side effects: Generally well-tolerated at 10–30 mg/day. Higher doses may cause irritability, anxiety, insomnia or acne (androgenic conversion). May cause headache or dizziness in sensitive individuals. Rare reports of heart palpitations at high doses.

Who should avoid: Pregnant and breastfeeding women. Individuals with hormone-sensitive cancers (breast, prostate, ovarian). Those with bipolar disorder or seizure disorders (neurosteroid modulation may destabilise mood or lower seizure threshold). Children and adolescents. Not for use as a steroid hormone replacement without endocrinological supervision.

Avoid combining with: Hormone replacement therapy, DHEA supplements (redundant steroid precursor stack), Corticosteroids, Anticonvulsants, Benzodiazepines (theoretical GABA-A interaction), SSRIs (theoretical serotonergic interaction)

India-Specific Context

Pregnenolone is available on Amazon India with varying brand quality. When selecting a product, verify standardization claims against the evidence base cited above. Indian brand preferences include Carbamide Forte, HealthyHey, Nutrabay Pure, Pure Nutrition, Now Foods, Nutricost, Himalaya, Patanjali, Dabur, Trexgenics, Evorina, Nervana, and Life Extension. Prices vary significantly; compare cost-per-active-dose rather than capsule count alone.

Schedule status in India: Not a Schedule H drug; available as dietary supplement/herbal product.

Research Summary

Key citations: PMID 3427920 (schizophrenia RCT, n=see study), PMID 3519851 (DAT KO mouse hyperactivity normalisation), PMID 9758222 (acetylcholine release enhancement), PMID 11744095 (memory and aging review)

Evidence grade: C+ — Limited human RCTs; strong preclinical neurosteroid data; one schizophrenia RCT (n=see study)

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