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Muira Puama (Ptychopetalum olacoides)

Ptychopetalum olacoides
Evidence Level
Preliminary
1 Clinical Trial
5 Documented Benefits
1/5 Evidence Score

Muira puama is an Amazonian wood and bark, traditionally called potency wood, used for libido, erectile function, and as a nerve tonic for energy and mood. It is a popular ingredient in libido and vitality formulas and is traditionally used to support sexual function in both men and women and to ease fatigue, though human evidence is limited and drawn mostly from small studies and traditional use. It is used as a tincture, tea, or capsule, often combined with other tonic herbs such as catuaba. Muira puama is generally tolerated in traditional amounts; because rigorous safety and dosing data are limited, use as directed and consult a doctor if you have a medical condition.

Studied Dose 1.5 g/day dried bark; consumer 500-1,500 mg/day dried bark OR 250-500 mg 4:1-10:1 extract.
Active Compound Muirapuamine, β-sitosterol, lupeol, coumarin, essential oils (β-caryophyllene, α-pinene), free fatty acids.

Benefits

Female Libido Support (Combination Product)

A study in healthy women with low sex drive found a Muira Puama + Ginkgo biloba combination (Herbal vX) significantly improved self-reported sexual function scores in 65% of participants after 1 month. Limitation: combination product, no active comparator, single non-blinded trial. Cannot isolate muira puama's contribution from ginkgo's effects.

Supported by Trial 1

Erectile Dysfunction (Older Limited Trials)

Older French studies reported muira puama extract (1.5 g/day) improved ED symptoms in 51% of men and increased libido in 62% over 2 weeks. Limitations: these were not published in peer-reviewed PubMed-indexed journals, lacked rigorous controls, and have not been independently replicated. Modern evidence-based reviews note the literature is sparse and often anecdotal.

Supported by Trial 1

Animal-Model Antifatigue and Adaptogenic Effects

Animal studies suggest muira puama has antistress effects, improves CNS performance under stress, and may have neuroprotective properties via mAChR cholinergic system modulation. Underlies traditional 'tonic' use for fatigue, nervous exhaustion, and convalescence. Human translation is limited.

Supported by Trial 1

Possible PDE5-Independent Erection Mechanism (Animal)

A rat study with muira puama + ginger + guaraná + L-citrulline combination showed effects similar to tadalafil in delaying age-related erectile dysfunction. Mechanism appears distinct from PDE5 inhibition, possibly involving NO synthase preservation. Translation to human therapy not established.

Supported by Trial 1

Traditional Antirheumatic and Tonic Use

Indigenous Amazonian use covers neuromuscular problems, rheumatism, GI/cardiac asthenia, prevention of baldness, and general 'strength' tonic. European herbal medicine adopted muira puama as antirheumatic, aphrodisiac, and nervous system tonic. Traditional use exceeds modern RCT evidence base.

Supported by Trial 1

Mechanism of action

1

Cholinergic / mAChR Modulation

Animal studies suggest muira puama affects muscarinic acetylcholine receptors (mAChR), providing a potential mechanistic basis for traditional CNS tonic effects and possible cognitive/sexual function impact. Mechanism is incomplete and based primarily on rodent data.

2

Sterol-Mediated Hormonal Modulation

β-Sitosterol, lupeol, and other plant sterols in muira puama may have weak hormonal effects (5α-reductase inhibition, mild estrogenic/androgenic activity). Common to many 'aphrodisiac' herbs but rarely the primary mechanism — relevant for traditional use claims rather than confirmed sexual function effects.

3

Antistress / Neuroprotective Activity (Animal)

Antistress effects have been demonstrated in mice (forced swim, tail suspension). Mechanism may involve glucocorticoid axis modulation and antioxidant defense. Provides mechanistic plausibility for the traditional 'tonic' claim and possible mood support, though human data is essentially absent.

4

Antimicrobial and Antioxidant Activity (In Vitro)

Studies have demonstrated antimicrobial activity against various pathogens and free radical scavenging activity. These broad bioactivities are common to many plant extracts and don't directly explain the libido/aphrodisiac claims, but contribute to traditional 'general health tonic' framing.

5

Possible Vasodilatation

Mechanistic theories propose mild vasodilatation contributing to erectile function via increased penile blood flow. Direct vascular pharmacology evidence specifically for muira puama is sparse. Most apparent effects in animal studies have used combination products, complicating mechanism attribution.

Clinical trials

1
Herbal vX (Muira Puama + Ginkgo) for Women's Libido

Open-label clinical trial of Herbal vX, a commercial supplement combining Muira puama and Ginkgo biloba. 1-month treatment. Self-assessment questionnaires for sexual function before and after intervention. (Waynberg, Adv Ther)

202 healthy pre- and postmenopausal women complaining of low sex drive.

Significantly higher average total sexual function scores in 65% of the sample after 1 month of treatment. Specifically, 65% reported increased frequency and intensity of sexual thoughts, improved orgasm. **Limitations**: combination product (cannot isolate muira puama effect from ginkgo); no placebo control; subjective self-report measures. Promising but methodologically weak signal.

Side effects and drug interactions

Common Potential side effects

Generally well-tolerated in traditional and supplemental use.
Limited modern human safety data — most evidence is from traditional use or animal studies.
Possible CNS stimulation, insomnia, restlessness at high doses.
Possible mild GI symptoms.
Pregnancy and lactation: avoid — insufficient safety data, and phytochemicals (e.g., coumarin) raise theoretical concerns.
Cardiovascular conditions: caution due to possible mild stimulant effects.
Long-term safety beyond traditional use is not characterized.
Coumarin content theoretically may affect coagulation.

Important Drug interactions

Anticoagulants (warfarin): theoretical interaction via coumarin content — monitor.
Stimulants (caffeine, ADHD medications): possible additive CNS stimulation.
MAO inhibitors: theoretical interaction; clinical relevance unclear.
Cholinergic medications (donepezil, rivastigmine): theoretical interaction via mAChR effects.
PDE5 inhibitors (sildenafil, tadalafil, vardenafil): theoretical additive effects on sexual function — clinical relevance not established.

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Frequently asked questions about Muira Puama (Ptychopetalum olacoides)

What is muira puama used for?

Muira puama is an Amazonian wood and bark, known as potency wood, used traditionally for libido, erectile function, and as a nerve tonic for energy and mood. It is a popular ingredient in libido and vitality formulas.

Does muira puama help with libido?

It is traditionally used to support libido and sexual function in both men and women, and as a tonic for fatigue and mood. Human evidence is limited, drawn mostly from small studies and traditional use.

How much muira puama should I take?

It is used as a tincture, tea, or capsule; follow product labeling. It is often combined with catuaba or other tonic herbs.

Is muira puama safe?

It is generally tolerated in traditional amounts. Because rigorous safety and dosing data is limited, use as directed and check with a doctor if you have a medical condition or take medication.

What is Muira Puama?

Muira puama is an Amazonian wood and bark, traditionally called potency wood, used for libido, erectile function, and as a nerve tonic for energy and mood. It is a popular ingredient in libido and vitality formulas and is traditionally used to support sexual function in both men and women and to ease fatigue, though hu…

What is the recommended dosage of Muira Puama?

The clinically studied dose is 1.5 g/day dried bark; consumer 500-1,500 mg/day dried bark OR 250-500 mg 4:1-10:1 extract. Always follow the product label and check with a healthcare provider for personal advice.

Is Muira Puama safe, and does it have side effects?

For most healthy adults, Muira Puama is well tolerated at studied doses. Reported effects can include: Generally well-tolerated in traditional and supplemental use. Limited modern human safety data — most evidence is from traditional use or animal studies. It may also interact with some medications. Muira Puama 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 Muira Puama interact with any medications?

Possible interactions include: Anticoagulants (warfarin): theoretical interaction via coumarin content — monitor. Stimulants (caffeine, ADHD medications): possible additive CNS stimulation. If you take prescription medication, check with a pharmacist or doctor before using it.

How strong is the scientific evidence for Muira Puama?

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

References(2 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. Waynberg J, Brewer S Effects of Herbal vX on libido and sexual activity in premenopausal and postmenopausal women Advances in Therapy. 2000;17(5):255-62. doi:10.1007/BF02853164.PubMedUsed to support: Open-label study (n=202 women) of a combination herbal product containing muira puama (Ptychopetalum olacoides) alongside Ginkgo biloba; reported improvements in libido, sexual desire, and satisfaction in premenopausal and postmenopausal women; supports Female Libido Support (Combination Product) benefit. Note: unblinded and combination product design limits attribution to muira puama alone.
  2. Figueiró M, Ilha J, Pochmann D, Porciúncula LO, Xavier LL, Achaval M, Nunes DS, Elisabetsky E Acetylcholinesterase inhibition in cognition-relevant brain areas of mice treated with a nootropic Amazonian herbal (Marapuama) Phytomedicine. 2010;17(12):956-62. doi:10.1016/j.phymed.2010.03.009.PubMedUsed to support: Animal study demonstrating that oral P. olacoides (Marapuama) extract inhibits acetylcholinesterase in the hippocampus and prefrontal cortex of mice; provides a preclinical mechanistic basis for the adaptogenic/nerve-tonic and anti-fatigue claims. Data are animal-only and do not confirm human effects.