Does Fadogia agrestis raise testosterone?

No human testosterone evidence

Promoted online for testosterone. Who took part in the research? Rats.

#12 of 12 in 12 Testosterone Boosters, Ranked by What's Actually Been Tested

What the human studies found

A plant used in traditional African medicine.
In a 2005 study, male rats given the stem extract had higher testosterone.
In a later study, the same research team reported what it called “indications of adverse effects” on the rats’ testicular function.
We couldn’t find a single human trial measuring testosterone (PubMed and ClinicalTrials.gov, searched October 3, 2026).

The studies (3)

Excerpt from Avula et al. · Planta Med · 2019 — Avula et al. · Planta Med · 2019 · PubMed 30170324 · screenshot via Europe PMC

Excerpt from Yakubu et al. · Asian J Androl · 2005 — Yakubu et al. · Asian J Androl · 2005 · PubMed 16281088 · screenshot via Europe PMC

Excerpt from Yakubu et al. · J Ethnopharmacol · 2008 — Yakubu et al. · J Ethnopharmacol · 2008 · PubMed 18023305 · screenshot via Europe PMC

The anchor source is a 2024 systematic review by a team of urologists (Morgado et al., International Journal of Impotence Research). They looked at 52 studies covering 27 proposed testosterone boosters. Their conclusion: most fail to increase total testosterone.

Fadogia: rats only. Tribulus: no effect. Maca: no effect. Tongkat ali: possibly.

Watch all 12, ranked: the film on YouTube · 6:44

If you're worried your testosterone is genuinely low, the test isn't a supplement: it's a blood test, and a conversation with a doctor. This is an investigation of the claims, not a guide to taking them.

Sources checked October 3, 2026 · How we check · Corrections: hello@testedinhumans.com

What the human studies found

The studies (3)

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