Linseed is a plant-based oil that is derived from the seeds of the flax plant (Linum usitatissimum). It has been used for centuries in various industries, including paint and varnish production, as well as in cooking and nutritional supplements. The oil is rich in essential fatty acids, particularly omega-3 and omega-6, which are important for maintaining good health. In addition to its culinary uses, linseed oil can also be used as a drying oil in painting and as a woodworking lubricant.