The common oat is a popular cereal grain that has been eaten for at least 3,000 years. Although this is one of the main uses for this plant, various parts of the plant, such as the young seed and the oatstraw, are nutritive and have nervine qualities, and are thus a favorite amongst herbalists for supporting the nervous system. This plant is highly valued for its ability to restore balance and a sense of calm in weak and stressed out individuals. It may be helpful in treating anxiety, insomnia and nervousness. Oatstraw is also high in silica, a mineral that is largely responsible for healthy skin, hair, nails and bones. High in calcium and other minerals, an infusion of oatstraw is an herbal remedy that can nourish the body at the deepest level.