Flax seeds are small, flat, oval-shaped seeds from the flax plant, varying in color from brown to yellow, and have a nutty flavor and crisp texture. Rich in fiber, omega-3 fatty acids (ALA), and lignans, they are used as a food, fiber, and oil source, with benefits for digestion, heart health, and more. For optimal nutrient absorption, they should be ground before consumption, as whole seeds may pass through the digestive system undigested.