Nettles nourishes the kidneys and the urinary tract. Nettles contains high amounts of iodine, which makes it beneficial for the thyroid gland. Nettle is also rich in vitamins A and C, iron, calcium, magnesium, potassium, and chlorophyll. Historically, nettle has been used to relieve coughs, tuberculosis, arthritis, and to stimulate hair growth. [ NettleArticle ]