Side-by-side comparison of mechanisms, dosing, interactions, and stacking potential.
| Alpha Lipoic Acid (ALA) | Pregnenolone | |
|---|---|---|
| Category | Supplements | Supplements |
| Standard Dose | 300-600mg R-ALA daily | Research indicates 10-50 mg daily orally for neurosteroid and cognitive support. Clinical trials in schizophrenia used up to 500 mg/day. |
| Timing | On empty stomach, 30-60 min before meals. Split doses for higher amounts. | Morning dosing preferred (aligns with diurnal cortisol rhythm). Sublingual may provide faster onset and better bioavailability. Take with or without food. |
| Cycle Duration | ongoing or cycle 12 weeks on, 4 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 | strong_human | moderate_human |
ALA is a dithiol compound that functions as a cofactor for mitochondrial alpha-keto acid dehydrogenases (pyruvate dehydrogenase, alpha-ketoglutarate dehydrogenase). Both ALA and its reduced form DHLA are potent antioxidants capable of regenerating other antioxidants including vitamin C, vitamin E, and glutathione. ALA activates AMPK, improving glucose uptake via GLUT4 translocation, and modulates NF-kB-mediated inflammatory signaling. It chelates redox-active metals (Fe2+, Cu2+).
300-600mg R-ALA daily
On empty stomach, 30-60 min before meals. Split doses for higher amounts.
ongoing or cycle 12 weeks on, 4 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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