Tinkturenpresse

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Tribulus terrestris L. - Zygophyllaceae - 蒺藜 ji li (chin.), caltrop, cat's-head, puncturevine, Erd-Burzeldorn, Erdsternchen

Prostrate annual herb, mat-forming, native to Africa, Asia, and southern Europe; leaves pubescent, short petioled, even-pinnately compound, opposite, leaflets opposite, oblong, pubescent on the lower surface and the midrib of the upper surface; flowers yellow, 8-10 mm wide, solitary from the axils of the small leaves, peduncles 2-15 mm long, petals yellow; fruit 1cm thick, splitting at maturity into 5 segments each with a line of horny processes down the back and 2 lateral spines toward the center.
http://www.efloras.org/florataxon.aspx?flora_id=2&taxon_id=200012418

„Hormonal effects of Tribulus terrestris (TT) were evaluated in primates, rabbit and rat to identify its usefulness in the management of erectile dysfunction (ED). TT extract was administered intravenously, as a bolus dose of 7.5, 15 and 30 mg/kg, in primates for acute study. Rabbits and normal rats were treated with 2.5, 5 and 10 mg/kg of TT extract orally for 8 weeks, for chronic study. In addition, castrated rats were treated either with testosterone cypionate (10 mg/kg, subcutaneously; biweekly for 8 weeks) or TT orally (5 mg/kg daily for 8 weeks). Blood samples were analyzed for testosterone (T), dihydrotestosterone (DHT) and dehydroepiandrosterone sulphate (DHEAS) levels using radioimmunoassay. In primates, the increases in T (52%), DHT (31%) and DHEAS (29%) at 7.5 mg/kg were statistically significant. In rabbits, both T and DHT were increased compared to control, however, only the increases in DHT (by 30% and 32% at 5 and 10 mg/kg) were statistically significant. In castrated rats, increases in T levels by 51% and 25% were observed with T and TT extract respectively that were statistically significant. TT increases some of the sex hormones, possibly due to the presence of protodioscin in the extract. TT may be useful in mild to moderate cases of ED.“
[The hormonal effects of Tribulus terrestris and its role in the management of male erectile dysfunction – an evaluation using primates, rabbit and rat., Gauthaman, K., Ganesan, A.P., Phytomedicine, Vol.15(1), 2008, 44-54]