Side-by-side comparison of mechanisms, dosing, interactions, and stacking potential.
| Fadogia Agrestis | Tongkat Ali (Eurycoma longifolia) | |
|---|---|---|
| Category | Adaptogens | Adaptogens |
| Standard Dose | 400-600mg daily | 200-400mg daily (standardized to 2% eurycomanone or 22-40% bioactive content) |
| Timing | Morning with food. | Morning with or without food. Can split AM/PM. |
| Cycle Duration | Cycle 4-8 weeks on, 2-4 weeks off (limited long-term safety data) | Cycle 8 weeks on, 2 weeks off (or 5 days on, 2 off) |
| Evidence Level | animal_plus_anecdotal | moderate_human |
Fadogia agrestis stem extract contains saponins and alkaloids that appear to increase luteinizing hormone (LH) release from the anterior pituitary, stimulating Leydig cell testosterone production. Animal studies suggest it may also have direct effects on testicular steroidogenic enzymes and may increase testicular weight. The saponin content may modulate gonadotropin-releasing hormone (GnRH) pulse frequency. The aphrodisiac effects are likely mediated through increased testosterone and possibly direct effects on dopaminergic and nitrergic pathways.
400-600mg daily
Morning with food.
Cycle 4-8 weeks on, 2-4 weeks off (limited long-term safety data)
Tongkat Ali contains quassinoids (eurycomanone, eurycomanol) and bioactive peptides (eurypeptides). Primary mechanisms: reduces SHBG binding, freeing testosterone; inhibits aromatase (CYP19A1), reducing estrogen conversion; modulates the HPA axis reducing cortisol; stimulates Leydig cell steroidogenesis via cAMP pathway activation; and may inhibit phosphodiesterase (PDE) enzymes. The net effect is increased free testosterone, improved testosterone:cortisol ratio, and enhanced libido via dopaminergic and NO-mediated pathways in erectile tissue.
200-400mg daily (standardized to 2% eurycomanone or 22-40% bioactive content)
Morning with or without food. Can split AM/PM.
Cycle 8 weeks on, 2 weeks off (or 5 days on, 2 off)
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