Flax seeds are tiny, smooth, oval-shaped seeds with a glossy brown or golden-yellow hue. They have a mild, nutty flavor and a slightly crunchy texture when whole, turning gel-like when soaked. Rich in omega-3 fatty acids, fiber, and lignans, they support heart and digestive health. Often added to smoothies, oatmeal, baked goods, or used as an egg substitute in vegan recipes.