Bluebonnet Vitex Berry Extract, also known as chasteberry, features 1.13 mg of agnusides, one of the active ingredients in vitex berry. Bluebonnet uses a gentle water based extraction process that protects and preserves vitex's most valuable components. Free of milk, egg, fish, crustacean shellfish, tree nuts, peanuts, wheat, soybeans, yeast, gluten, barley, rice, sugar and sodium.