Tribesterone contains the clinically tested ingredient Tribulus Terrestris that supports increases in free testosterone levels in adult males. Hi-Tech’s R&D department has tested many Tribulus raw materials and typically the Chinese and Indian Tribulus extracts with label claim content of 60-90% saponins according to the Bulgarian spectrophotometric assay test will only be 0.5-5%, which is a staggering difference. Hi-Tech's Tribesterone® is standardized at 60% furostanol saponins with a minimum of 40% protodioscin.