PRICE: $13.95 for each 60 capsule bottle (400 mg per capsule) Barlowe's Herbal Elixirs brings you the highest quality and most potent Tribulus Terrestris Extract available which has been specifically designed to increase  testosterone. This is a powerful extract which has been standardized to 40% Protodioscin and 90% total Furostanol Saponins.  Click on this link: Tribulus 40% Protodioscin Extract, to see the Certificate of Analysis on this particular batch. It is the Steroidal Saponins (especially Protodioscin) in Tribulus that cause the increase in testosterone and there is no more concentrated form of Tribulus than that offered by Barlowe! High Protodioscin Standardized Tribulus can help you build muscle and increase sexual performance. These vegetable-derived capsules (Vegan, Kosher and Halal certified) are filled by hand with a manual encapsulation machine, not with a high speed automatic machine, and thus, only pure, unadulterated Tribulus Extract is in the capsules. Capsules produced with high speed machines in herbal remedy and vitamin "factories" contain several other ingredients, including preservatives because so many bottles of product are produced at one time, and lubricants to ensure that the machines will run faster and more efficiently. Check their labels! Also, Barlowe's Herbal Elixirs is one of the very few manufacturers that still pack their products in glass whenever possible, even though glass is more expensive. Barlowe believes that chemicals can leach out of plastic containers and contaminate the contents, and that the use of glass is much better for the environment. Research: Protodioscin in Tribulus Improves Sexual Performance Due to Anabolic Effect Protodioscin Has Androgen Increasing Properties Testimonials: Hi Barlowe, Just dropping a few words about the awesome results I got from using your Tribulus and Fenugreek Supplements.  For the past three years I suffered from low testosterone.  My numbers were in 150s and 200s for total from my blood tests.  After being on the Trib and Fenugreek for one month, I took  another blood test and had for the first time a total testosterone above 500 and free testosterone of 102.  Thank you for such awsome products at unbeatable prices!  You have a customer for life!  D.S., Sacramento, CA Caution: Barlowe's Tribulus Extract uses only the finest quality Tribulus 40% Protodioscin Standardized Extract with 90% total Furostanol Saponins from the most trusted supplier. This superb, targeted herbal extract is generally safe, but it is potent and should be utilized with care. This product is for dietary use. If side-effects occur, discontinue use immediately! The above statements have not been evaluated by the Food and Drug Administration (FDA). This product is not intended to diagnose, treat, cure, or prevent any disease. Directions For Use: Take one (400 mg) capsule either once or twice a day.  Results and usage amounts may vary based on body type and weight. Tribulus Terrestris 40% Protodioscin Extract PRICE: $13.95 for each 60 capsule bottle (400 mg per capsule)