Side-by-side comparison of mechanisms, dosing, interactions, and stacking potential.
| Lion's Mane (Hericium erinaceus) | Pregnenolone | |
|---|---|---|
| Category | Nootropics | Supplements |
| Standard Dose | 500-3000 mg/day of fruiting body extract (standardized to >30% polysaccharides) or 1000-3000 mg/day of mycelium extract (erinacine-enriched) | Research indicates 10-50 mg daily orally for neurosteroid and cognitive support. Clinical trials in schizophrenia used up to 500 mg/day. |
| Timing | Morning or split morning/afternoon. With or without food. Effects are cumulative — expect 2-4 weeks before noticeable cognitive benefit. | Morning dosing preferred (aligns with diurnal cortisol rhythm). Sublingual may provide faster onset and better bioavailability. Take with or without food. |
| Cycle Duration | Ongoing; no cycling strictly required, though some users cycle 8 weeks on, 2 weeks off | Ongoing with periodic reassessment. Cycle 5 days on / 2 days off, or 3-4 weeks on / 1 week off to prevent downstream hormone accumulation. |
| Evidence Level | moderate_human | moderate_human |
Contains hericenones (fruiting body) and erinacines (mycelium) that stimulate nerve growth factor (NGF) synthesis in glial cells via activation of the JNK pathway. Erinacines cross the blood-brain barrier via passive diffusion and act as potent neurotrophin-stimulating compounds, activating the TrkA receptor and downstream ERK1/2 signaling cascades to promote hippocampal neurogenesis and synaptic plasticity. Also demonstrates anti-inflammatory activity through suppression of NF-kB and upregulation of BDNF expression.
500-3000 mg/day of fruiting body extract (standardized to >30% polysaccharides) or 1000-3000 mg/day of mycelium extract (erinacine-enriched)
Morning or split morning/afternoon. With or without food. Effects are cumulative — expect 2-4 weeks before noticeable cognitive benefit.
Ongoing; no cycling strictly required, though some users cycle 8 weeks on, 2 weeks off
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.
Research indicates 10-50 mg daily orally for neurosteroid and cognitive support. Clinical trials in schizophrenia used up to 500 mg/day.
Morning dosing preferred (aligns with diurnal cortisol rhythm). Sublingual may provide faster onset and better bioavailability. Take with or without food.
Ongoing with periodic reassessment. Cycle 5 days on / 2 days off, or 3-4 weeks on / 1 week off to prevent downstream hormone accumulation.
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