Flaxseed contains high levels of protein, dietary fiber, several B vitamins, and dietary minerals. Ten grams of flaxseed contains one gram of water-soluble fiber and three grams of insoluble fiber. Flaxseeds are especially rich in thiamine, magnesium, potassium, and phosphorus. Flax contains hundreds of times more lignans than other plant foods.
It also contains omega-3 fatty acids, omega-9 fatty acids, and omega-6 fatty acids; the seeds contain saturated fat and palmitic acid.