Side-by-side comparison of mechanisms, dosing, interactions, and stacking potential.
| DHEA (Dehydroepiandrosterone) | Pyrroloquinoline Quinone (PQQ) | |
|---|---|---|
| Category | Supplements | Supplements |
| Standard Dose | 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) | — |
| Evidence Level | moderate_human | Moderate |
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).
25-50mg daily (men); 10-25mg daily (women)
Morning (mimics natural circadian peak). With food.
Ongoing under supervision with regular blood monitoring (DHEA-S, testosterone, estradiol, PSA in men)
Redox cofactor that stimulates mitochondrial biogenesis via PGC-1alpha activation. Potent antioxidant (5000x more efficient than vitamin C in redox cycling). Supports nerve growth factor (NGF) synthesis and protects neurons from oxidative damage.
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