Fadogia Agrestis
Research Reliability -
A West African shrub extract popularized for libido and testosterone support, with far thinner human research than its popularity suggests.
Appetite
Mood
Sleep
Fadogia Agrestis
Description
Fadogia agrestis rose to mainstream biohacking awareness largely through internet and podcast discussion rather than a deep clinical evidence base — the supporting research is almost entirely confined to rodent studies showing testosterone increases at doses and durations that do not map cleanly onto human supplementation. This is a case where popularity has outpaced data, and rodent studies using extended high-dose protocols showed testicular tissue changes, which is why most cautious longevity physicians recommend short cycles rather than continuous year-round use, plus regular hormone panel monitoring rather than assuming it is working.
Effects
First 1–2 weeks
some notice libido or drive changes
Weeks
Caution
How It Feels
Some men report increased libido and drive within a week or two, and it is commonly paired with tongkat ali. Be aware the human safety data is thin, with animal studies raising organ-toxicity questions at high doses, so conservative dosing and cycling are wise. This is a use-with-caution compound.
Evidence
Evidence Strength
Animal / preclinical only
Caveats
No human clinical trials exist for Fadogia agrestis. All available efficacy data are from rat studies, some of which also raised hepatic and testicular toxicity signals at higher doses. Popular testosterone claims are not supported by any human evidence.
Usage
Commonly Referenced Starting Amount
No established human dose
Commonly Referenced Amount
There are zero published human clinical trials of Fadogia Agrestis. Every testosterone claim traces back to rat studies, and those same studies documented dose-dependent testicular toxicity in the animals — this is the most significant evidence gap on the entire list
Referenced Upper Limit
No human upper limit exists because no human safety trial exists. A liver- and kidney-function toxicity signal in the animal literature sits uncomfortably close to the doses commercial products sell. We'd rather say plainly that we don't know a safe human dose than imply one
Onset
1–2 weeks
Biomarkers to Track
Subjective
(Daily)
Libido (1–10)
Energy and motivation
Mood
Objective
(Quarterly)
Total and free testosterone (baseline and follow-up)
Liver enzymes (ALT, AST)
LH and FSH
Limited human safety data, and animal studies raise organ-toxicity concerns at high doses. Approach with real caution.
Anyone wanting established safety, men with hormone-sensitive conditions, and long-term daily users.
Taking high doses continuously, when conservative dosing and cycling are wiser given the thin data.
Disclaimer
This information is for educational purposes only and is not medical advice. It is not intended to diagnose, treat, cure, or prevent any disease. Consult a qualified healthcare provider before starting any new supplement, especially if you are pregnant, nursing, taking medication, or managing a health condition.
Yakubu MT, Akanji MA, Oladiji AT (2005). Asian Journal of Andrology, 7(4), 399-404. Animal study (rat testosterone and reproductive parameters). PMID: 15908133.
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