Urtica dioica. 450 mg per Serving. Green Screened . Easy-to-Swallow Capsules. Nettle Leaves contain alkaloids that neutralize uric acid. Nettle Leaves are rich in iron which is vital in circulation and helpful in high blood pressure. Nettle Leaves are also rich in silicon potassium vitamins A and C. Nettle Leaves contain a high content of protein. Nettle has a long history of use from ancient Greece to the present.