❓ Frequently Asked Questions
Nutricost Fadogia Agrestis 600mg
In This Article
600mg standardized extract — Huberman protocol dose
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Fadogia agrestis became the most-searched testosterone supplement overnight when Andrew Huberman mentioned it on his podcast. Over 50 million podcast downloads later, demand has exploded — but the scientific picture is more nuanced than the hype suggests. Here’s what the research actually shows.
What Is Fadogia Agrestis?
Fadogia agrestis is a flowering plant native to West and Central Africa, traditionally used in Nigerian ethnomedicine for male fertility and sexual vitality. The active compounds — saponins and alkaloids — are believed to stimulate luteinizing hormone (LH) release, which in turn signals the testes to produce testosterone.
What the Research Actually Shows
Animal Studies: Testosterone Increase
A 2005 study in Asian Journal of Andrology is the most-cited reference: male rats given fadogia agrestis extract showed significant increases in testosterone, LH, and mounting frequency after 28 days. The effect was dose-dependent, with higher doses showing stronger but also more toxic effects. Critical caveat: this is a rat study. Human clinical trials are essentially nonexistent as of 2026.
The Huberman Effect
Andrew Huberman uses fadogia agrestis as part of his “Huberman Protocol” alongside tongkat ali. His framing: LH stimulation → natural testosterone signal → no suppression of the HPG axis. This is theoretically plausible, but the evidence base for humans is still largely extrapolated from animal data and mechanistic reasoning.
Fadogia Agrestis Dosage
Most studied dose: 18mg/kg in rats (scaling to approximately 100-200mg for humans by allometric scaling). Common supplement dose: 400-600mg of standardized extract per day. Huberman uses 400mg. Cycle: 8 weeks on, 2 weeks off. Take with food to reduce potential GI effects.
Safety Concerns — Read This First
- Testicular toxicity at high doses: The 2005 rat study showed testicular damage at doses of 100mg/kg — well above the standard dose, but a legitimate concern that warrants conservative dosing and cycling.
- No long-term human safety data: Fadogia is unscheduled and unregulated. No multi-year human trials exist. Use at your own risk.
- Liver toxicity signal: Some in vitro studies flag potential hepatotoxicity. Until human trials clarify this, get regular liver panels if taking long-term.
- Drug interactions: Theoretical interactions with testosterone therapies, 5-alpha reductase inhibitors, and medications metabolized by CYP3A4.
Fadogia Agrestis vs Tongkat Ali — Quick Comparison
| Fadogia Agrestis | Tongkat Ali | |
|---|---|---|
| Evidence base | Animal studies only | Multiple human RCTs |
| Mechanism | LH stimulation | SHBG reduction + cortisol |
| Safety | Limited long-term data | Well-established profile |
| Dose | 400-600mg/day | 200-400mg/day |
| Huberman uses | Yes (400mg) | Yes (400mg) |
Frequently Asked Questions
Does fadogia agrestis actually increase testosterone in humans?
No human clinical trials confirm this yet. The mechanism is plausible and animal data is promising, but direct human evidence is currently lacking. That said, it’s widely used in the biohacking community without reported serious adverse effects at standard doses.
Should I cycle fadogia agrestis?
Yes — cycling is strongly recommended. Standard protocol: 8 weeks on, 2 weeks off. This minimizes the theoretical risk of testicular desensitization and aligns with Huberman’s own usage pattern. Get testosterone and liver panels before starting and after 8 weeks.
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