Herbal traditions have used this plant for centuries, but we like to go a step further and look at what modern research actually shows. Below is a plain-language look at the peer-reviewed studies behind Tribulus Terrestris, organized around its most commonly claimed uses.
Natural Aphrodisiac / Libido & Sexual Performance (Both Sexes)
In women: In a randomized, double-blind, placebo-controlled trial in 40 premenopausal women with diminished libido, Tribulus terrestris significantly improved total sexual function score and the specific domains of desire, arousal, lubrication, orgasm, and satisfaction, alongside a measurable increase in serum testosterone. In men: In a phase IV, prospective, randomized, double-blind, placebo-controlled clinical trial in 180 men with mild-to-moderate erectile dysfunction — including men with hypertension, diabetes, and metabolic syndrome — Tribulus terrestris extract was compared directly against placebo for its effect on erectile function and libido. 🔗 Female clinical trial (PubMed) · Male clinical trial (PubMed)
Sexual Function in Premenopausal and Postmenopausal Women
A systematic review of clinical trials found that three months of Tribulus terrestris treatment increased serum testosterone in premenopausal women, and concluded the plant may be a reasonable option for sexual dysfunction across both pre- and postmenopausal populations, though the certainty of the evidence was rated low, with more high-quality trials needed to confirm the effect. 🔗 Systematic review (PubMed)
Erectile Dysfunction and Infertility
A meta-analysis pooling data from 133 subjects found statistically significant improvements in both sperm concentration and sperm motility with Tribulus terrestris use, supporting its traditional reputation as a profertility remedy. It's worth being transparent that not every trial agrees: a separate randomized, placebo-controlled study in men with unexplained infertility found no significant change in testosterone, LH, or semen parameters after three months of treatment, so results for fertility specifically remain mixed across the available studies. 🔗 Meta-analysis · Unexplained infertility trial (PubMed)
Normal Testosterone Levels
A 2025 systematic review of 10 clinical trials involving 483 participants found that most studies (8 out of 10) showed no significant change in androgen profile following Tribulus terrestris supplementation. Only two trials showed a modest increase in total testosterone, and both were conducted in men who already had low testosterone (hypogonadism) at baseline. This is the most current and complete picture of the evidence: Tribulus terrestris does not reliably raise testosterone in men who already have normal levels, but may offer modest support in men with an existing deficiency. 🔗 Systematic review (PubMed)
Prostate Health (Including Benign Prostatic Hyperplasia)
In a double-blind, double-dummy, randomized controlled trial in men over the age of 50, an oral formulation combining Murraya koenigii and Tribulus terrestris significantly lowered IPSS (International Prostate Symptom Score) in the initial treatment of symptomatic benign prostatic hyperplasia, when compared directly against the standard pharmaceutical drug tamsulosin. 🔗 Human clinical trial
Kidney and Bladder Stones / Normal Urinary Tract Function
In a human study on both healthy volunteers and patients with urinary stones, Tribulus terrestris extract measurably reduced urinary oxalate, protein, and glycosaminoglycan levels — key stone-forming substances — supporting its long traditional use for expelling and preventing kidney and bladder stones or sand. In earlier pharmacological testing, an aqueous Tribulus terrestris extract produced a diuretic effect slightly greater than the pharmaceutical drug furosemide, providing a mechanistic basis for its traditional role in flushing the urinary tract. 🔗 Human urinary stone study · Diuretic mechanism study (PubMed)
Proper Function of the Reproductive System and Sexual Organs
Beyond the sexual function trials above, Tribulus terrestris's role in reproductive health is further supported by its traditional and pharmacological classification as a uroprotective and reproductive tonic across Ayurvedic medicine, where it has long been used for conditions affecting both male and female reproductive organs alongside its better-documented aphrodisiac applications. 🔗 Human clinical trial (Male sexual dysfunction)
Normal Muscle Function
In a randomized, single-blind, placebo-controlled trial, six weeks of Tribulus terrestris supplementation was evaluated in trained CrossFit athletes for its effects on body composition, hormonal response, muscle and inflammatory biomarkers, and training performance, reflecting the plant's popular traditional use among athletes seeking natural support for high-intensity training and recovery. 🔗 Athletic performance clinical trial (PMC)
Cardiovascular System
In an animal model of hypertension, Tribulus terrestris produced a significant reduction in blood pressure, working by lowering the activity of ACE (angiotensin-converting enzyme) in the heart, kidney, lung, and aorta — the same enzyme targeted by a major class of pharmaceutical blood pressure medications, providing a genuine mechanistic basis for its traditional cardiovascular use. 🔗 Antihypertensive mechanism study (PubMed)
Proper Functioning of the Nervous System
In an animal model of Parkinson's disease, a standardized Tribulus terrestris extract protected against oxidative DNA damage and the loss of dopamine-producing neurons in the brain, improving motor function — early but genuine evidence for the plant's traditional and emerging modern reputation as a neuroprotective herb. 🔗 Neuroprotective study (PubMed)
Why This Matters
Each of these claims has been studied to differing degrees, with Tribulus terrestris's strongest and most consistent evidence lying in sexual function and libido support for both women and men, and in its traditional urinary tract and kidney stone applications — both backed by genuine human clinical trials. It's important to be transparent that the evidence is considerably weaker and more mixed for testosterone-boosting specifically in men with normal hormone levels, and that claims around prostate health, cardiovascular support, muscle function, and nervous system protection currently rest mainly on animal and mechanistic research, or on combination formulas rather than Tribulus terrestris used alone in large human trials.
This post is for educational purposes and summarizes existing scientific literature. It is not medical advice, and Tribulus terrestris is not intended to diagnose, treat, cure, or prevent any disease. Please consult a healthcare provider before using herbal supplements, especially if you have prostate cancer or a hormone-sensitive condition, kidney disease, diabetes, or are taking blood pressure, blood-thinning, or blood sugar medication, as Tribulus terrestris has documented hormonal, blood pressure, and blood sugar effects, and case reports exist of kidney and liver toxicity with its use.