Flax seeds, also known as linseeds, are small, brown or golden seeds derived from the flax plant (Linum usitatissimum). They are rich in dietary fiber, omega-3 fatty acids, and various essential nutrients. Flax seeds are commonly used as a dietary supplement and ingredient in various foods due to their health benefits, including improved digestion, reduced inflammation, and support for heart health. They can be consumed whole, ground, or as flax seed oil.