Muira puama,
does it really help with Improvement of male libido and erectile function?
research showsA preliminary human report administered a standalone Ptychopetalum olacoides extract at 1-1.5 g/day for about two weeks to 262 men; 62% of participants with low libido and about 51% of those with erection problems reported subjective improvement. Human efficacy literature is therefore not wholly absent. However, the report lacked randomization, placebo, and validated scales and survives mainly as a 1990 conference report and a low-visibility two-page 1994 paper, placing it at the bottom of grade C with 40 points. The female Herbal vX trial used a Ginkgo combination and cannot be attributed to muira puama alone.
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
Waynberg's preliminary report gave a standalone P. olacoides extract at 1-1.5 g/day for about two weeks to 262 men; 62% of those with low libido and about 51% of those with erection problems reported subjective benefit. A later PMC review cites the source as a two-page 1994 American Journal of Natural Medicine report, and the same dataset is also traced to a 1990 conference presentation. Randomization, placebo, validated scales, and complete statistical reporting are absent. The 2000 study by Waynberg and Brewer surveyed 202 women receiving Herbal vX, a muira puama plus Ginkgo biloba combination, without a control group, so it was excluded from standalone attribution. Blood-pressure and drug-interaction safety remain separately uncertain.
Why this is classified as C (40)
The 262-man preliminary report of standalone P. olacoides excludes a strict unknown grade. Its uncontrolled, nonrandomized self-assessment, absence of validated scales and replication, and survival mainly as a 1990 conference report and low-visibility two-page 1994 paper place it at the bottom of C with 40 points. The female Herbal vX combination was excluded from standalone attribution, and blood-pressure and interaction safety were assessed separately.
Counterpoint. A standalone human signal exists, but uncontrolled self-ratings do not establish efficacy. A placebo-controlled trial of a reproducible extract should prospectively specify IIEF and successful-intercourse outcomes.
Rejudgment record. Reassessment (cross-check reflected) — A preliminary 262-man standalone P. olacoides report excludes an unknown grade, but absent randomization, placebo, validated scales, and replication plus low-visibility two-page reporting limit it to the bottom of C; female combination evidence and safety were separated
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 | After 1-1.5 g/day for about two weeks, 62% with low libido and about 51% with erection problems reported subjective improvement, without randomization, placebo, or validated scales. | Limited positive |
| 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 — 5 References
All 5 cited sources were verified for existence at the original page (as of 2026-07-17).
Reviewed and approved: Chamgap Editorial Team · Approval date: 2026-07-17 · Corrections: none
Cite this verdict
[Chamgap] Muira puama (Ptychopetalum olacoides) x male libido and erectile function — Evidence Grade C·40. 5 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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