Flaxseed is a great source of protein and fiber, and it also protects your health. Ground flaxseed is preferred over whole flaxseed by most nutritionists because it is easier to digest. Flaxseed's health advantages derive from its high fiber content, omega-3 fatty acids, and phytochemicals known as lignans. Flaxseed is frequently used to aid digestion and treat constipation. Flaxseed may also lower total blood cholesterol and low-density lipoprotein (LDL, or "bad") cholesterol, lowering the risk of heart disease.