Stinging Nettle is an extract of either the leaves and flowering parts or the roots of Urtica dioica, a tall herbaceous plant found throughout the world in temperate and humid areas. Extracts of the leaves of stinging nettle are use in foods and animal feed and are purported to be beneficial for many conditions. Extracts of the roots are purported to relieve urinary symptoms in patients with benign prostatic hypertrophy. Stinging nettle extracts are generally well tolerated and have not been implicated in instances of serum aminotransferase elevations or cases of clinically apparent liver injury.