omega-3 and omega-6 act to lower LDL (bad cholesterol) and increase HDL (good cholesterol) reducing the risk of cardiovascular disease.
omega-3 polyunsaturated fats also promote the elasticity of blood vessels and prevent blood cots, also decreasing the risk of heart attack and stoke
food sources:
omega 3 -- fish, trout, salmon, sardines
omega 6 -- mainly nuts (walnuts), seeds and oil made from corn, safflower and soy