Tribulus Terrestris 45% Saponins Powder is widely known as an herbal aphrodisiac that improves libido in humans. Also known as an antiseptic diuretic, Tribulus Terrestris is said to stimulate the flow of urine and believed to benefit the urinary tract and kidneys. Moreover, its reputed antiseptic qualities help to relieve urinary tract infections and urinary discharges; and the increased urine flow also helps to flush the kidneys of impurities and may inhibit calculus and stone formation.