Throughout early Europe, nettles were credited with nourishing and immune-stimulating properties.
Nettle tea was used for intestinal weakness, diarrhea, and malnutrition -- uses that persist to the present time. Nettles also act as a diuretic and are useful in treating kidney weakness and bladder infections. As a diuretic, nettles can help rid the body of excess fluid (edema) in persons with weakened hearts and poor circulation.
Nettles also have been used topically to treat eczema and skin rashes and soothe arthritic and rheumatic joints. In fact, the plant has been most widely studied for its value in the treatment of arthritis and gout. When uric acid, a product of protein digestion, accumulates in the joints and tissues, a very painful inflammatory condition known as gout can result. One tablespoon of fresh nettle juice several times a day has been shown to help clear uric acid from the tissues and enhance its elimination from the body.
Fresh nettle preparations sting a bit, and it is this sting that seems to have a healing effect: The reddening and stinging of the skin appear to reduce the inflammatory processes of dermatologic conditions (such as eczema) and rheumatic conditions (such as arthritis and gout). The tiny, stinging hairs contain formic acid and a bit of histamine. (Mosquitoes and biting ants also secrete formic acid, which is responsible for the familiar stinging and itching of their bites.) Nettles also are high in anti-inflammatory flavonoids, and they contain small amounts of plant sterols. They are extremely rich in vital nutrients, including vitamin D, which is rare in plants; vitamins C and A; and minerals, including iron, calcium, phosphorus, and magnesium.
Since nettles contain numerous nourishing substances, they are used in cases of malnutrition, anemia, and rickets, and as a tonic to help repair wounds and broken bones. You can cook nettles and eat them as you would steamed spinach -- their taste and appearance are similar. Nettles are a healthy and tasty addition to scrambled eggs, pasta dishes, casseroles, and soups. You also can juice nettles and combine the juice with other fresh juices, such as carrot or apple juice, for weak, debilitated persons, such as cancer and AIDS patients. Nettle preparations also have been shown to be effective in controlling hay fever symptoms.
Nettle root has been found to increase a protein in the blood to which hormones bind. Ingesting nettle root helps to effectively reduce the amount of sex hormones that are "unbound"; that is, free to affect various tissues in the body. This can be helpful in cases of excessive hormonal stimulation, such as polycystic ovarian syndrome in women or benign prostatic hyperplasia in men.