Source and sharing: https://www.sciencedirect.com/topics/pharmacology-toxicology-and-pharmaceutical-science/tribulus
“Tribulus
There is little information on the traditional use of tribulus leaf. In Ayurvedic medicine, the fruit has been used for improving male fertility and male erectile function, uterine disorders, urinary disorders, kidney stones, gout, and gonorrhea. As a result of Bulgarian research, tribulus has become a popular herb for the treatment of infertility, menopause, and low libido. It acts as a general tonic, aphrodisiac, and is used to restore vitality, reduce the physiologic effects of stress, and is a powerful fertility tonic for both men and women.
Open-label clinical trials have demonstrated improvements in both male and female infertility. Bulgarian research has identified a unique steroidal saponin known as a furostanol saponin, calculated to no less than 45% protodioscin. The leaf is noted to be higher in the unique saponin than the fruit.”