Tribulus Terrestris for Testosterone Support

Research suggests that the evidence for Tribulus terrestris raising testosterone levels in humans is weak and inconsistent, with a 2019 review and a 2022 scoping review both concluding that it lacks meaningful scientific support for increasing total testosterone in men, despite some animal studies showing modest hormonal or sperm-related effects. Studies indicate that where Tribulus terrestris has appeared in clinical trials, it was typically as part of multi-ingredient stacks — combined with androstenedione, DHEA, and other herbal compounds — making it impossible to isolate any contribution it may have made to the observed hormonal changes, which themselves were often unfavorable, including rises in estradiol and DHT alongside reductions in HDL cholesterol. A 2020 systematic review of five small randomized controlled trials found possible benefits for female sexual function and modest testosterone increases in premenopausal women, though the authors rated the certainty of that evidence as very low and called for more rigorous research before conclusions can be drawn. Across the body of literature, most human trials are small, short in duration, or confounded by multi-ingredient formulations, and a 2025 analytical study raised additional concerns about supplement quality, finding that some commercial Tribulus products contained undisclosed compounds and potentially adulterated ingredients, further complicating any interpretation of the available evidence.