Linseed oil is a natural oil derived from the seeds of the flax plant. It is commonly used in various applications, including woodworking, painting, and as a dietary supplement. The oil is rich in omega-3 fatty acids, which are beneficial for heart health. In woodworking, linseed oil serves as a protective finish, enhancing the appearance of wood while providing moisture resistance. It can also be used in oil paints, helping to improve the flow and drying time. Additionally, linseed oil is sometimes added to health supplements for its nutritional benefits.