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Fadogia Agrestis supplement
Herbal Extract

Fadogia Agrestis — Research Profile

Evidence:Preliminary
·

This content is for informational purposes only and does not constitute medical advice. Statements about dietary supplements have not been evaluated by the FDA and are not intended to diagnose, treat, cure, or prevent any disease. Individual results may vary — consult your healthcare provider before starting any supplement. Full disclaimer

Fadogia agrestis is a West African herb promoted for testosterone support, but evidence is limited to animal studies...

Fadogia agrestis is a West African herb promoted for testosterone support, but evidence is limited to animal studies only. Rat studies show dose-dependent testosterone increases but also testicular toxicity at higher doses. No human clinical trials have been published. Use with significant caution.

Bottom line: Fadogia agrestis lacks human clinical evidence entirely. Animal data shows testosterone increases but also testicular toxicity. Use only with caution and medical supervision.

Evidence:Animal (2005) · low confidence[#1]. See full reference list below.

Key Facts

What it is
Stem extract from a West African shrub (Fadogia agrestis) containing saponins and alkaloids proposed to stimulate testicular Leydig cells
Primary benefits
  • May increase testosterone (animal data only)
  • Traditional aphrodisiac use in West Africa
  • Proposed Leydig cell stimulation mechanism
Typical dosage
300-600mg stem extract daily (no established human dosage)
Evidence level
Preliminary
Safety profile
Caution Needed

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What the Research Says

The evidence base for Fadogia agrestis is extremely limited. Yakubu et al. (2005) published the primary study, administering aqueous stem extract to male Wistar rats at 18, 50, and 100 mg/kg body weight for 5 days. The extract produced dose-dependent increases in serum testosterone and pro-sexual behavioral changes. However, the same research group published a follow-up study (Yakubu et al., 2008) showing significant dose-dependent testicular toxicity, including damage to seminiferous tubules and interstitial tissue at 100 mg/kg. These findings raise serious safety concerns that remain unresolved due to the complete absence of human clinical trials. The supplement gained popularity through social media and podcast discussions (notably Huberman Lab) rather than through clinical evidence, and the gap between consumer enthusiasm and scientific evidence is among the largest in the supplement industry.

Benefits of Fadogia Agrestis

  • Testosterone increase — Yakubu et al. (2005) found that aqueous stem extract of Fadogia agrestis significantly increased serum testosterone levels in male rats in a dose-dependent manner at 18, 50, and 100 mg/kg body weight over 5 days
  • Aphrodisiac effects — the same study by Yakubu et al. showed increased mount frequency, intromission frequency, and ejaculatory latency in rats, suggesting pro-sexual effects mediated by testosterone increases
  • Leydig cell stimulation — the proposed mechanism involves direct stimulation of testicular Leydig cells via saponin compounds, potentially increasing endogenous testosterone production rather than providing exogenous hormones
Did you know?

The evidence base for Fadogia agrestis is extremely limited.

Forms of Fadogia Agrestis

Fadogia Agrestis supplement forms compared by bioavailability and best use
FormBioavailabilityBest For
Aqueous Stem ExtractUnknown (no human pharmacokinetic data)The form used in the original animal studies; water-based extraction
Powdered Stem Extract (10:1 or 20:1)UnknownConcentrated capsule form commonly sold in supplements; standardization varies widely

Dosage Recommendations

General recommendation: 300-600mg stem extract daily (extrapolated from animal data; no human clinical dosing established)

Timing: Morning; often cycled (5 days on, 2 off) though no evidence supports specific cycling protocols • Take with food for best absorption.

Dosage by Condition

Testosterone support
300-600mg daily (anecdotal; no human trials)Preliminary

Upper limit: No established safe upper limit in humans; animal studies showed toxicity at higher doses (100 mg/kg in rats)

Side Effects and Safety

Safety profile: Caution Needed

Potential Side Effects

  • SIGNIFICANT CONCERN: testicular histological changes (damage to seminiferous tubules) observed in rats at 100 mg/kg — long-term safety in humans is completely unknown
  • Elevated liver and kidney function markers observed in animal studies at higher doses
  • No human safety data exists — all side effect information is extrapolated from rat studies
  • Anecdotal reports from users include elevated heart rate, insomnia, and mood changes

Drug & Supplement Interactions

  • Testosterone replacement therapy — potential additive effects; avoid combining without medical supervision
  • Fertility medications — unknown interaction potential due to lack of human data
  • Hepatotoxic medications — animal data suggests potential liver effects; use caution with other hepatotoxic substances
Check Fadogia Agrestis interactions with other supplements →
BenefitsDosage GuideSide EffectsTypes & FormsResearchFAQ

Related Conditions

Commonly Taken Together

Form Comparisons

Related Supplements

Frequently Asked Questions

Is fadogia agrestis safe to take?

The honest answer is that we do not know. No human clinical trials have been published. The only data comes from rat studies, which showed testicular toxicity at higher doses (100 mg/kg). While lower doses showed testosterone increases without apparent toxicity in rats, animal results do not always translate to humans. If you choose to use fadogia agrestis, do so under medical supervision with regular blood work monitoring liver function, kidney function, and hormone panels.

Evidence:Animal (2005) · low confidence[#1]. See full reference list below.

What dose of fadogia agrestis should I take?

There is no established human dosage based on clinical trials. The commonly recommended dose of 300-600mg daily is extrapolated from animal data and supplement industry convention, not from human research. The rat studies used 18-100 mg/kg body weight, with toxicity at the highest dose. Until human pharmacokinetic and safety studies are published, any dosing recommendation carries significant uncertainty.

Should I stack fadogia agrestis with tongkat ali?

This combination was popularized by podcast discussions but has never been studied in any clinical trial — neither individually in humans (for fadogia) nor in combination. Tongkat ali has moderate human evidence, while fadogia has none. Stacking two supplements that affect testosterone through different mechanisms introduces unknown interaction risks. If you choose to combine them, do so under medical supervision with baseline and follow-up hormone panels.

What is the best form of Fadogia Agrestis to take?

The best form of fadogia agrestis depends on your specific health goals, absorption needs, and tolerance. Chelated and standardized extract forms generally offer higher bioavailability than raw or unstandardized versions. Check the product label for third-party testing to ensure potency and purity.

What are the proven benefits of Fadogia Agrestis?

Fadogia Agrestis has been studied for multiple health applications with varying levels of clinical evidence. The strongest evidence typically comes from randomized controlled trials and meta-analyses published in peer-reviewed journals. Individual responses can vary based on baseline status, dosage, and duration of use.

How much Fadogia Agrestis should I take per day?

Fadogia Agrestis dosage depends on the specific form, your health goals, and individual factors such as body weight and baseline nutrient status. Following the dose used in clinical trials is generally the most evidence-based approach. Starting at the lower end of the recommended range and adjusting upward is advisable.

When is the best time to take Fadogia Agrestis?

Fadogia Agrestis timing depends on whether it is fat-soluble or water-soluble and whether it causes digestive sensitivity. Consistency in timing is more important than the specific hour of the day. Taking supplements at the same time daily helps maintain steady levels.

What are the side effects of Fadogia Agrestis?

Fadogia Agrestis is generally well tolerated at recommended doses, with gastrointestinal discomfort being the most commonly reported side effect. Side effects are typically mild and dose-dependent, resolving with dose reduction or taking with food. Serious adverse effects are rare at standard supplemental doses.

Does Fadogia Agrestis interact with any medications?

Fadogia Agrestis may interact with certain prescription medications by affecting absorption, metabolism, or pharmacological effects. Always inform your healthcare provider about all supplements you take, especially before surgery or when starting new medications. Spacing supplements and medications by 2 hours reduces most absorption interactions.

Who should consider taking Fadogia Agrestis?

Fadogia Agrestis is most appropriate for individuals with confirmed deficiency, suboptimal levels, or specific health conditions supported by clinical evidence. People in higher-risk demographics, including older adults and those with restricted diets, may benefit most. Testing baseline levels before supplementing provides the best guidance.

How long does Fadogia Agrestis take to show results?

Fadogia Agrestis effects vary by the specific health outcome being targeted, with some benefits appearing within days and others requiring weeks to months of consistent daily use. Correcting a deficiency typically shows improvement within 2-4 weeks. A minimum 8-12 week trial at the recommended dose is advisable before evaluating effectiveness.

Is Fadogia Agrestis safe for long-term daily use?

Fadogia Agrestis is considered safe for long-term use at recommended doses based on available clinical data. Staying within established upper intake limits minimizes the risk of adverse effects over time. Periodic reassessment with a healthcare provider is recommended, especially if health conditions change.

Can you take too much Fadogia Agrestis?

Exceeding the recommended dose of fadogia agrestis increases the risk of adverse effects without providing additional benefit. Toxicity risk varies by form and individual factors such as kidney and liver function. Mega-dosing is not supported by clinical evidence and should be avoided.

Can I combine Fadogia Agrestis with other supplements?

Fadogia Agrestis can generally be combined with complementary supplements, though some combinations may affect absorption or create additive effects. Spacing different supplements by 1-2 hours can reduce absorption competition. Consulting a healthcare professional is advisable when combining multiple supplements targeting the same health pathway.

What should I look for when buying a Fadogia Agrestis supplement?

Third-party testing from USP, NSF, or ConsumerLab is the most important quality indicator when purchasing fadogia agrestis supplements. Look for products that clearly state the specific form, dose per serving, and any relevant standardization percentages. Avoid proprietary blends that hide individual ingredient amounts.

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References

  1. AnimalYakubu MT, Akanji MA, Oladiji AT (2005). Aphrodisiac potentials of the aqueous extract of Fadogia agrestis (Schweinf. Ex Hiern) stem in male albino rats. Asian Journal of Andrology. DOI PubMed