Muira puama,
does it really help with Improvement of male libido and erectile function?
research showsMuira puama is known by the traditional name potency wood and by old open, uncontrolled reports in men, but no standalone placebo-controlled human efficacy trial was identified that standardized the plant species, extract, and dose and tested male libido or erectile function. Herbal vX combined muira puama with Ginkgo biloba and was an uncontrolled survey of 202 women, so it cannot establish standalone efficacy in men. Because the target claim has not been tested adequately, the grade is ? rather than no-effect D.
ads claimAdvertising combines the Amazonian traditional name potency wood, percentages from open reports, and results from a female combination product into a standalone male libido and erection claim. Botanical name, plant part, extraction ratio, and whether the product is a combination matter.
Useful facts when choosing a product
- In Korea, products are mainly available as cross-border capsules or powders; one identified label lists 300 mg per capsule and 600 mg per serving.
- The 1-1.5 g/day used in an old uncontrolled male report is not an established standardized effective dose.
- Ptychopetalum olacoides can be confused or combined with other Ptychopetalum species or botanicals such as catuaba, so botanical name and plant part should be checked.
- Standalone long-term safety and interaction data are insufficient, including use with cardiovascular drugs, blood-pressure drugs, or erectile-dysfunction medication.
What the research actually shows
The report by Waynberg in 262 men is repeatedly cited in later reviews as giving 1-1.5 g/day for about two weeks, followed by perceived benefit in more than 60% with low libido and more than 50% with erection difficulties. It is not a formal clinical publication with verifiable randomization, placebo, standardization, and validated endpoints. The 2000 Herbal vX study by Waynberg and Brewer surveyed 202 women with low desire after a muira puama plus Ginkgo biloba formula and had no control group. Reviews published in 2003 and 2010 judged the evidence preliminary or insufficient for recommendation. A 2020 review of erectile-dysfunction supplements likewise concluded that clinical data for individual ingredients were limited. Rat penile-smooth-muscle and animal combination studies are not standalone human erection trials.
Why this is classified as ?
The target outcomes of male libido and erectile function lack an identified standardized standalone human efficacy trial, so the grade is ?. An open report and a female combination product were not upgraded to standalone RCT evidence. Safety is separately unknown.
Counterpoint. There is also no large null trial proving ineffectiveness, so this is not D. A placebo-controlled male trial of a reproducible extract with prospectively specified IIEF and successful-intercourse endpoints is needed.
Rejudgment record. New verdict — No standardized standalone human trial of male libido or erectile function; excluded uncontrolled reports, a female combination product, and preclinical evidence from standalone attribution
Cross-check — Codex and Claude
Evidence Table
| Study | Design | Sample | Funding | Endpoint | Result | Weight |
|---|---|---|---|---|---|---|
| Waynberg male report (cited in later reviews) | Open uncontrolled before-and-after self-assessment report | 262 | Original report, funding, and extract standardization could not be verified | Self-rated improvement in low libido and erection | Improvement percentages are repeatedly cited but cannot be verified as a formal controlled clinical publication. | Indirect |
| Waynberg & Brewer 2000 | Uncontrolled survey of a muira puama plus Ginkgo combination | 202 | Branded Herbal vX combination; funding unknown | Self-rated female desire, intercourse frequency, fantasy, and satisfaction | Reported improvement signals, but the uncontrolled female combination cannot establish standalone male efficacy. | Excluded and indirect |
| Rowland & Tai 2003; Shamloul 2010 reviews | Reviews of botanical sexual treatments and natural aphrodisiacs | Unknown | Level of clinical evidence for libido and erectile function | Judged evidence for many ingredients, including muira puama, preliminary or insufficient. | Key | |
| Srivatsav et al. 2020 | Review of ingredients in erectile-dysfunction supplements | 10 | Academic authors; no commercial support reported | Efficacy and safety of individual ingredients for erectile function | Concluded that clinical data for many individual ingredients beyond L-arginine were limited and further research was required. | Supportive |
Receipt — 4 References
All 4 cited sources were verified for existence at the original page (as of 2026-07-16).
Reviewed and approved: Chamgap Editorial Team · Approval date: 2026-07-16 · Corrections: none
Cite this verdict
[Chamgap] Muira puama (Ptychopetalum olacoides) x male libido and erectile function — Evidence Grade ?. 4 cited sources checked. Source: https://chamgap.com/en/verdicts/mens/muira-puama-male-libido-erectile-function/ · CC BY 4.0CC BY 4.0 — free to use with attribution; do not distort grades, numbers, or verdict meaning.
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