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Tribulus Terrestris (Puncture Vine / Gokshura)

Tribulus terrestris
Evidence Level
Limited
2 Clinical Trials
5 Documented Benefits
2/5 Evidence Score

Tribulus terrestris is a flowering plant used in Ayurveda (gokshura), Traditional Chinese Medicine, and Eastern European traditional medicine for libido, urinary support, and 'vitality.' Active compounds include protodioscin and other steroidal saponins. CRITICAL: despite extensive marketing claims for testosterone enhancement, modern rigorous trials show tribulus does NOT meaningfully increase testosterone in healthy men — but it MAY improve libido and sexual function via different mechanisms.

Studied Dose 250-1,500 mg/day standardized extract (typically 40-60% saponins or 20% protodioscin); Bulgarian variety (Tribestan®) most studied
Active Compound Steroidal saponins — primarily protodioscin (~45% of total saponins), tribulosin

Benefits

Libido / Sexual Function (Both Sexes)

Multiple trials show modest improvement in libido, sexual desire, and sexual satisfaction in both men and women. Kamenov 2017 (HSDD in women), Akhtari 2014 (women's sexual dysfunction), Santos 2014 (men's libido) all support modest libido benefits. Effect not via testosterone — likely via NO/cGMP pathway and androgen receptor sensitivity.

Supported by Trial 1

Erectile Function Modest Improvement

Some trials show tribulus modestly improves erectile function — though far less effectively than PDE5 inhibitors (sildenafil, tadalafil). Reasonable for mild ED; not for moderate-severe ED.

Supported by Trial 1, Trial 2

Urinary / Kidney Support (Traditional)

Sanskrit name 'gokshura' translates to 'cow hoof' (referring to fruit shape that injures cattle hooves) — and traditionally used for urinary stones, dysuria, BPH. Modern evidence weak; traditional use established.

Supported by Trial 1, Trial 2

Mild Cardiovascular Effects

Some trials show modest BP and lipid effects. Less consistent than libido effects.

Supported by Trial 2, Trial 1

Athletic Performance — DOES NOT BOOST TESTOSTERONE OR PERFORMANCE

CRITICAL EVIDENCE-BASED CONTEXT: rigorous RCTs (Brown 2000) show tribulus does NOT increase testosterone, lean mass, or strength in healthy young men despite extensive marketing claims. This is one of the most over-marketed supplements relative to evidence.

Supported by Trial 2

Mechanism of action

1

Nitric Oxide / cGMP Pathway

Protodioscin enhances NO release from corpus cavernosum endothelium — promoting vasodilation similar to (but much weaker than) PDE5 inhibitors. Likely primary mechanism for sexual function effects.

2

Androgen Receptor Sensitivity (NOT Testosterone)

Some research suggests tribulus modestly increases androgen receptor density — explaining why it can affect libido without changing testosterone levels. Mechanism distinct from testosterone-boosting supplements.

3

DHEA Pathway (Theoretical)

Some studies suggest modest effects on DHEA but not testosterone itself. Mechanism unclear.

4

Calcium Channel Effects (Cardiovascular)

Steroidal saponins have some calcium channel modulating activity — basis for modest cardiovascular and BP effects.

Clinical trials

1
Tribulus for Hypoactive Sexual Desire Disorder in Women — Kamenov 2017
PubMed

RCT of tribulus 750 mg/day vs placebo in 60 women with HSDD for 12 weeks.

60 women with HSDD.

Tribulus significantly improved sexual desire, arousal, satisfaction vs placebo. Established modest evidence for female sexual dysfunction.

2
Tribulus Does NOT Increase Testosterone — Rogerson 2007
PubMed

RCT of tribulus 450 mg/day vs placebo in 22 elite rugby players for 5 weeks during pre-season training.

22 elite rugby players.

NO change in testosterone, no change in strength, no change in lean mass vs placebo. Consistent with multiple other trials in athletes. Established that tribulus DOES NOT meaningfully increase testosterone in healthy young men.

Side effects and drug interactions

Common Potential side effects

Generally well-tolerated.
GI distress (nausea, abdominal cramps).
Sleep disturbance / agitation in some.
Increased heart rate.
POTENTIAL HEPATOTOXICITY — case reports of liver injury attributed to tribulus, though confounded by polyherbal products.
POTENTIAL NEPHROTOXICITY — case reports.
Allergic reactions rare.
GYNECOMASTIA — case reports (paradoxical).
PSYCHOSIS / ELEVATED MOOD — rare case reports especially in predisposed individuals.

Important Drug interactions

Diabetes medications — modest hypoglycemic effect; monitor.
Lithium — may modestly affect levels (theoretical).
Antihypertensives — additive effects.
Anticoagulants — theoretical bleeding risk.
Diuretics — additive (tribulus has mild diuretic effect).
Hormone-sensitive conditions — uncertain effects; consult oncologist.
Sympathomimetics — additive stimulating effects.
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Frequently asked questions about Tribulus Terrestris (Puncture Vine / Gokshura)

What is Tribulus Terrestris (Puncture Vine / Gokshura)?

Tribulus terrestris is a flowering plant used in Ayurveda (gokshura), Traditional Chinese Medicine, and Eastern European traditional medicine for libido, urinary support, and 'vitality.

What does Tribulus Terrestris (Puncture Vine / Gokshura) do?

Protodioscin enhances NO release from corpus cavernosum endothelium — promoting vasodilation similar to (but much weaker than) PDE5 inhibitors. Likely primary mechanism for sexual function effects. In clinical research, Tribulus Terrestris (Puncture Vine / Gokshura) has been studied for libido / sexual function (both sexes), erectile function modest improvement, urinary / kidney support (traditional).

Who should take Tribulus Terrestris (Puncture Vine / Gokshura)?

Tribulus Terrestris (Puncture Vine / Gokshura) may be most relevant for people interested in men's health, women's health. It has been clinically studied for libido / sexual function (both sexes), erectile function modest improvement, urinary / kidney support (traditional). As with any supplement, consult your healthcare provider before starting, especially if you have medical conditions or take prescription medications.

How long does Tribulus Terrestris (Puncture Vine / Gokshura) take to work?

Most clinical trial effects appear over weeks of consistent use; individual response varies. Acute or same-day effects (where applicable) typically appear within hours, but most cumulative benefits — particularly those affecting biomarkers, mood, sleep quality, or chronic symptoms — require 4-12 weeks of regular use to fully assess. If you don't notice benefit after 12 weeks at the appropriate dose, it may not be your responder.

When is the best time to take Tribulus Terrestris (Puncture Vine / Gokshura)?

Tribulus Terrestris (Puncture Vine / Gokshura) can typically be taken with breakfast or dinner — taking with food reduces GI sensitivity for most supplements. Specific timing matters less than daily consistency for cumulative effects. Always check product labeling and follow personalized guidance from your healthcare provider.

Is Tribulus Terrestris (Puncture Vine / Gokshura) worth taking?

Tribulus Terrestris (Puncture Vine / Gokshura) has limited clinical evidence (Evidence Level 2/5 on NutraSmarts) — preliminary research suggests potential benefit, but more rigorous trials are needed. Whether it's worth taking depends on your specific goals, what you've already tried, your budget, and your overall supplement strategy. The honest framing: no supplement is essential for most people, and lifestyle factors (sleep, exercise, diet, stress management) typically produce larger effects than any single supplement. Tribulus Terrestris (Puncture Vine / Gokshura) is most worth trying if its evidence-supported uses align with your specific goals.

What is the recommended dosage of Tribulus Terrestris (Puncture Vine / Gokshura)?

The clinically studied dose for Tribulus Terrestris (Puncture Vine / Gokshura) is 250-1,500 mg/day standardized extract (typically 40-60% saponins or 20% protodioscin); Bulgarian variety (Tribestan®) most studied. Always follow product labeling and consult a healthcare provider for personalized dosing recommendations.

What is Tribulus Terrestris (Puncture Vine / Gokshura) used for?

Tribulus Terrestris (Puncture Vine / Gokshura) is studied for libido / sexual function (both sexes), erectile function modest improvement, urinary / kidney support (traditional). Multiple trials show modest improvement in libido, sexual desire, and sexual satisfaction in both men and women. Kamenov 2017 (HSDD in women), Akhtari 2014 (women's sexual dysfunction), Santos 2014 (men's libido) all support modest libido benefits.