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Fadogia Agrestis

Fadogia agrestis
Evidence Level
Preliminary
2 Clinical Trials
4 Documented Benefits
1/5 Evidence Score

Fadogia agrestis is a Nigerian shrub used in traditional African medicine for sexual function. Popularized in Western supplement market by Andrew Huberman's podcast as testosterone-supportive (often paired with tongkat ali). Critical evidence gap: no human trial of Fadogia has ever been published; the primary research is animal-based, showing increased testosterone in male rats. Limited safety data. Animal toxicity studies show testicular damage at high doses — significant safety concern for chronic supplementation.

Studied Dose 300 to 1,200 mg/day is the marketed range, not a dose shown safe or effective in people (no human trial exists); rat studies showed adverse testicular and hepatorenal effects.
Active Compound Saponins, alkaloids, anthraquinones (specific actives not well-characterized).

Benefits

Animal Testosterone Increase (Limited Human Translation)

In male rats, fadogia extract significantly increased serum testosterone. Generated significant interest in human testosterone supplementation. Critical: animal-to-human extrapolation is uncertain; no rigorous human RCTs replicate this finding; popular Huberman podcast positioning exceeds the evidence.

Supported by Trial 1

Traditional Aphrodisiac (Nigerian Folk Medicine)

Used in Nigerian and West African traditional medicine for sexual function support. Anecdotal effects on libido and erection quality. Modern evidence weak.

Supported by Trial 1, Trial 2

Ethnobotanical Use: In-Vitro Antiplasmodial (Not a Health Benefit)

Recorded in West African traditional medicine for fever and malaria. The only modern data is an in-vitro screen in which a crude extract inhibited cultured chloroquine-resistant malaria parasites (IC50 between 4 and 10 micrograms/mL). No human antimalarial study exists, and anti-inflammatory activity was never tested. This is a historical-use note, not a health benefit.

Supported by Trial 2

Fadogia Plus Tongkat Ali Stack: No Human Evidence

Marketers pair fadogia with tongkat ali and claim testosterone support for the combination. No human study has tested the combination, and no synergy has been shown.

Supported by Trial 1, Trial 2

Mechanism of action

1

Animal Testosterone Mechanism (Unclear)

In rats, fadogia increases serum testosterone (a separate rat study found adverse testicular changes at higher doses, and no sperm-count benefit has been shown) — mechanism not fully characterized. May involve LH stimulation or direct testicular effects.

2

Saponin Activity

Steroidal saponins present in extract; specific effects on steroidogenesis unclear.

3

Anthraquinone Content (Theoretical Concern)

Anthraquinones (also found in laxatives like senna) raise potential concern for chronic GI and possibly liver effects with prolonged use.

4

Testicular Toxicity at High Doses (Animal)

Paradoxical: while modest doses increase testosterone in rats, higher or prolonged doses produce adverse changes in testicular biochemistry and function in rats, with recovery seen only at the lowest folklore dose. The pattern of apparent benefit at low doses and harm at higher doses warrants significant caution.

Clinical trials

1
Animal Study (Male Albino Rats): Fadogia and Testosterone
PubMed

Animal study of fadogia agrestis stem extract in male albino rats. Outcomes: serum testosterone, mating behavior.

Male albino rats.

Increased serum testosterone, mating behavior, and sexual organ weights at modest doses. Generated supplement industry interest. Critical: animal-only study; no rigorous human translation.

2
Animal Study (Male Albino Rats): Adverse Testicular Effects
PubMed

Rat study of Fadogia agrestis stem extract (18 to 100 mg/kg for 28 days) measuring testicular function indices.

Male albino rats.

Over 28 days at 18 to 100 mg/kg the extract altered testicular biochemistry in ways the authors described as adverse effects on testicular function, with recovery only at the lowest folklore dose. No histology was done and there is no human data. This undercuts the 'testosterone booster' framing.

Side effects and drug interactions

Common Potential side effects

Potential testicular toxicity at high or chronic doses — based on animal evidence; human translation unclear but warrants caution.
Limited safety data overall — minimal human pharmacovigilance.
GI distress.
Headache.
Liver and kidney toxicity in animals: a 28-day rat study found oxidative stress and disrupted liver and kidney cell membranes. No human liver-injury case reports have been published for Fadogia alone, but this animal signal warrants caution, especially with prolonged use.
Allergic reactions theoretically possible.
May affect prolactin / hormone levels (mechanism unclear).

Important Drug interactions

Hormone-sensitive conditions — uncertain effects; avoid without oncologist consultation.
Testosterone replacement / TRT — additive effects unclear; consult prescriber.
Anticoagulants — theoretical interactions.
Other testosterone-supportive supplements — theoretical additive effects but evidence limited.
Hepatotoxic drugs — theoretical additive concerns.

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Frequently asked questions about Fadogia Agrestis

What is Fadogia agrestis used for?

Fadogia agrestis is an African shrub marketed as a testosterone and libido booster, popular in some men's vitality supplements. Its traditional use is as an aphrodisiac.

Does Fadogia agrestis boost testosterone?

Its reputation comes mainly from animal studies suggesting raised testosterone; there is very little human research to confirm benefits or define safe use. Claims should be viewed as unproven in people.

How much Fadogia agrestis should I take?

Human dosing is not established, and product quality varies widely. Given the lack of human safety data, caution is essential and it should be approached carefully.

Is Fadogia agrestis safe?

Human safety data is very limited, and animal studies have raised concerns about potential organ (including testicular) toxicity at higher doses with prolonged use. Because of this uncertainty, caution is warranted; consult a healthcare professional before use.

What is Fadogia Agrestis?

Fadogia agrestis is a Nigerian shrub used in traditional African medicine for sexual function. Popularized in Western supplement market by Andrew Huberman's podcast as testosterone-supportive (often paired with tongkat ali).

What is the recommended dosage of Fadogia Agrestis?

The clinically studied dose is 300 to 1,200 mg/day is the marketed range, not a dose shown safe or effective in people (no human trial exists); rat studies showed adverse testicular and hepatorenal effects. Always follow the product label and check with a healthcare provider for personal advice.

Is Fadogia Agrestis safe, and does it have side effects?

For most healthy adults, Fadogia Agrestis is well tolerated at studied doses. Reported effects can include: Potential testicular toxicity at high or chronic doses — based on animal evidence; human translation unclear but warrants caution. Limited safety data overall — minimal human pharmacovigilance. It may also interact with some medications. Fadogia Agrestis is not right for everyone, so check with a healthcare provider first if you are pregnant or breastfeeding, have a medical condition, or take prescription medication.

Does Fadogia Agrestis interact with any medications?

Possible interactions include: Hormone-sensitive conditions — uncertain effects; avoid without oncologist consultation. Testosterone replacement / TRT — additive effects unclear; consult prescriber. If you take prescription medication, check with a pharmacist or doctor before using it.

How strong is the scientific evidence for Fadogia Agrestis?

NutraSmarts rates the evidence for Fadogia Agrestis as Preliminary (1 out of 5). It is backed by 2 clinical trials and 4 cited references summarized on this page. A higher rating reflects more, larger, and better-designed human studies.

References(4 citations)

Evidence ratings on NutraSmarts are based on the totality of human clinical research, with emphasis on randomized controlled trials, meta-analyses, and systematic reviews. The references below directly support claims made throughout this page.

  1. Yakubu MT, Akanji MA, Oladiji AT Aphrodisiac potentials of the aqueous extract of Fadogia agrestis (Schweinf. Ex Hiern) stem in male albino rats Asian Journal of Andrology. 2005;7(4):399-404. doi:10.1111/j.1745-7262.2005.00052.x.PubMedUsed to support: In male albino rats dosed at 18, 50 and 100 mg/kg, Fadogia agrestis stem extract raised serum testosterone in a dose-dependent manner and increased mount and intromission frequency over 5 days. Rats only; no human data on testosterone or sexual function exists.
  2. Yakubu MT, Oladiji AT, Akanji MA Mode of cellular toxicity of aqueous extract of Fadogia agrestis (Schweinf. Ex Hiern) stem in male rat liver and kidney Human & Experimental Toxicology. 2009;28(8):469-78. doi:10.1177/0960327109106973.PubMedUsed to support: In male rats given 18 to 100 mg/kg for 28 days, the extract raised serum liver and kidney enzymes and malondialdehyde, indicating oxidative stress and disrupted hepatocyte and kidney-cell membranes. Animal evidence of hepatorenal toxicity; no human safety data.
  3. Sanon S, Ollivier E, Azas N, Mahiou V, Gasquet M, Ouattara CT, Nebie I, Traore AS, Esposito F, Balansard G, Timon-David P, Fumoux F Ethnobotanical survey and in vitro antiplasmodial activity of plants used in traditional medicine in Burkina Faso Journal of Ethnopharmacology. 2003;86(2-3):143-147. doi:10.1016/s0378-8741(02)00381-1.PubMedUsed to support: Ethnobotanical survey of Burkina Faso medicinal plants in which a crude Fadogia agrestis extract inhibited chloroquine-resistant Plasmodium falciparum in culture (IC50 between 4 and 10 micrograms/mL). In-vitro only, not a human antimalarial result, and inflammation was not tested.
  4. Yakubu MT, Akanji MA, Oladiji AT Effects of oral administration of aqueous extract of Fadogia agrestis (Schweinf. Ex Hiern) stem on some testicular function indices of male rats Journal of Ethnopharmacology. 2008;115(2):288-292. doi:10.1016/j.jep.2007.10.004.PubMedUsed to support: In male rats given 18 to 100 mg/kg for 28 days, Fadogia agrestis stem extract altered testicular biochemistry (cholesterol, sialic acid, glycogen, and phosphatase and glutamate-dehydrogenase activities), which the authors read as adverse effects on testicular function; only the lowest 18 mg/kg dose recovered. Animal evidence, no histology, and no human data. This is the actual source for the page's testicular-toxicity claims.