Omega-3

Salmon, flax seeds, and walnuts are good sources for omega-3, which is unsaturated fatty acid.

Omega-3 is believed to lower the risk of coronary heart diseases by helping blood circulation(lowering blood pressure, decreasing the level of triglyceride in blood).

α-linolenic acid (ALA), eicosapentaenoic acid (EPA), and docosahexaenoic acid (DHA) are three kinds of omega-3. ALA is the essential nutrient, which means we have to intake it from outer source since our body cannot produce it.EPA and DHA are said to be important for brain function and structure.

Remember that too much of something is never good!Too much supplement of omega-3 can increase the risk of bleeding, especially for those who take aspirin or warfarin.

For more information : wikipedia for omega-3 may contain unproven information.