The plant is covered with stinging hairs which are neutralized by cooking or drying. The stinging is said to be helpful in treating arthritis. Leaves are a good source of vitamins, minerals, and protein - up to 25% dry weight. They are diuretic and used to treat anemia, gout, rheumatism and flu. Nettles are used in some dandruff shampoos; farmers will feed some to cattle to make their coats more glossy. Excellent compost activator - they contain quite a bit of nitrogen. A fiber plant - Nettles have been used to make clothing for over 2000 years, Nettle textiles are still commercially produced today. The roots are a source of a yellow dye, leaves yield a yellow/green. Formerly (and still) used to flavor beer and cordials.