Flaxseed extract is a kind of plant ligan most notably found in flaxseed. Secoisolariciresinol diglycoside, or Lignans is existed as its main bioactive components. Lignans is classified as a phytoestrogen since it is a plant-derived, nonsteroid compound that possesses estrogen-like activity. Lignans has weak estrogenic activity, when intake as food it will be trasfer to flax ligan which have same structure with estrogens,The level of Lignans in flaxseed typically varies between 0.6% and 1.8%. Lignans can reduce the blood lipid, cholesterin and triglyceride, it can also prevent for apoplexy, hyperension, blood clots, arteriosclerosis and arrhythmia. In addition, Lignans is benificial for diabetes and CHD.