Tribulus (Expanded) for Libido And Sexual Function

Research suggests that Tribulus terrestris may have some role in supporting erectile function and sexual desire, though the evidence base remains limited and the underlying mechanisms are not well established. A 2016 narrative review synthesizing decades of phytochemical, animal, and human research found mixed support for these effects, noting that while some studies point to potential benefits for libido and erectile dysfunction, the commonly cited explanation — that Tribulus works by raising testosterone or other androgens — is poorly supported by available data. Instead, animal research has pointed toward a nitric oxide and endothelial pathway as a more plausible mechanism, similar to how certain pharmaceutical treatments for erectile dysfunction operate, though this has not yet been adequately tested in human trials. Overall, the evidence is preliminary and largely indirect, and stronger, well-designed human studies are needed before firm conclusions can be drawn about how or whether Tribulus reliably affects sexual function.