Fadogia Agrestis
A West African shrub traditionally used as an aphrodisiac. Modern research shows it stimulates luteinizing hormone (LH) secretion, driving endogenous testosterone production. The most popular natural LH secretagogue in biohacking — typically stacked with Tongkat Ali.
Medical Disclaimer: The information on this page is for educational and research purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment.
What Is Fadogia Agrestis?
Fadogia agrestis is a shrub native to Nigeria and West Africa, used for centuries in traditional medicine as an aphrodisiac and tonic. The stem extract is the primary commercially available form.
Interest in the biohacking community accelerated after high-profile mentions in performance and longevity circles — typically presented as a natural LH secretagogue to pair with Tongkat Ali for comprehensive testosterone optimisation.
Mechanism of Action
The central mechanism is luteinizing hormone (LH) stimulation. Animal studies demonstrate that Fadogia agrestis extract raises serum LH, which signals Leydig cells in the testes to increase testosterone biosynthesis.
This is mechanistically distinct from Tongkat Ali, which works primarily by displacing testosterone from sex hormone-binding globulin (SHBG) and reducing cortisol-mediated suppression. The two compounds address different nodes in the HPG axis — making them genuinely complementary.
Evidence Base
Honest assessment: the evidence base is limited and predominantly from rat studies.
Key animal data shows significant testosterone increases at 18–100 mg/kg doses, alongside aphrodisiac behavioural effects. However, the same studies identified potential testicular toxicity at higher doses — histological changes in Leydig and Sertoli cells at excessive dosing.
No published human RCTs exist as of 2026. Human evidence consists entirely of anecdotal reports and extrapolation from animal data.
Safety Profile
The testicular toxicity signal is the primary concern. It appears dose-dependent: conservative doses showed no morphological changes in testicular tissue, while high doses produced concerning findings. The therapeutic window appears meaningful but narrow.
Liver enzyme elevation has been reported at excessive doses in animal models. Baseline and follow-up bloodwork (testosterone panel, LFTs) is strongly recommended for extended use.
Dosage
| Parameter | Recommendation |
|---|---|
| Dose | 425–600 mg/day standardised extract |
| Timing | With food |
| Cycle | 8 weeks on, 4 weeks off |
| Stack | Tongkat Ali 400–600 mg/day |
| Monitoring | Testosterone panel + LFTs at 8 weeks |
Related Research
Stacking Interactions
How Fadogia Agrestis interacts with other compounds
Safety Profile — Tier C
Use caution — limited human data
Contraindications
- ●Existing liver or kidney conditions
- ●Hormone-sensitive cancers
- ●Pregnancy and breastfeeding
- ●Children and adolescents
Side Effects
- ●Potential testicular toxicity at high doses (rat data)
- ●Elevated liver enzymes at excessive doses
- ●Nausea at higher doses
- ●Unknown long-term human safety profile