Tribulus Terrestris is a ayurvedic herb commonly recommended for male health including libido and testosterone support. Tribulus contains Saponins which help stimulate the bodys production of LH (pre-testosterone) which in turns promotes testosterone production and libido. It is important to choose a Tribulus product with high levels of Saponins or it will not provide much of a benefit. Double Woods Natural Tribulus fruit extract contains over 95 Saponins making it the strongest on the market. Double Woods Max Strength 95 Saponin Tribulus Fruit Extract is Manufactured and Tested in the USA Non-GMO and Gluten Free. Our extra large bottles contain 210 capsules of Tribulus to last you over 3 months. Each serving contains 1000mg. (2 capsule serving)