What it is
Tribulus terrestris is a botanical containing steroidal saponins; products are not standardized consistently.
Core function and why it is studied
Its composition or proposed mechanism makes exercise performance and recovery logical research areas. Studies therefore examine sexual-function and exercise-performance measures. That biological connection explains why it is studied; it does not by itself establish a meaningful benefit.
What the evidence means
Human studies and reviews report variable results. Differences in preparation, dose, duration, population, and outcome selection limit broad conclusions.
How to compare products
Compare species, plant part, extract ratio, solvent, standardized constituents, serving amount, and contaminant testing.