Flax seeds 100g. Digestive Health: Flax seeds are a great source of dietary fiber, which can help regulate bowel movements and relieve constipation. The mucilage in flax seeds, a type of soluble fiber, can also contribute to digestive regularity, Heart Health: Flax seeds may help lower cholesterol levels, including LDL ("bad") cholesterol, and potentially reduce the risk of heart disease. The omega 3 fatty acids and lignans in flax seeds can also contribute to