Tribulus contains an extract of Tribulus terrestris herb to support healthy vitality, stamina and reproductive function. This herb is traditionally used in herbal preparations to: Help support normal reproductive function in men and women Help support normal hormone production in men and women Promote vitality and stamina Support physical endurance* Take 1 tablet 1 - 3 times daily, or as directed. Serving Size: 1 Tablet Amount Per Serving Calcium ... 74mg Tribulus herb 55:1 extract ... 245.45mg (aerial parts) from Tribulus terrestris herb (aerial parts) 13.5 g Containing furostanol saponins as protodioscin 100 mg Other Ingredients: Dibasic calcium phosphate dihydrate, microcrystalline cellulose, sodium starch glycolate, hypromellose, silicon dioxide and magnesium stearate. Caution: Not to be used during pregnancy and lactation unless otherwise directed by a qualified health care professional.