Tribulus terrestris L. is a common plant in Europe, Africa and Asia and its extracts, containing saponins such as protodioscins, have been always used as natural remedies to stimulate energy, vitality and sexual performance. Protodioscins act in an androgen mimetic way, boosting production of testosterone and DHT and this stimulating erectile function, libido and vitality.

Photo: Fagg, M., (credits Australian National Botanic Gardens)