Increases natural testosterone. Increases sexual libido. Increases strength and endurance. Ultra concentrated Bulgarian species. 100% Pure Tribulus Terrestris. 90% furastanol saponins. Safe for men AND women. Each capsule contains a minimum of 90% saponins, double that of other Tribulus products. ALLMAX TribX90 now offers you the highest quality 100% pure Bulgarian Tribulus Terrestris species with TRIBX90. Laboratory testing has confirmed the extraordinarily high levels of 90% steroidal saponins using High Performance Liquid Chromatography (HPLC) assays.