It can also reduce your clotting factor if taken in too high doses, causing excessive bleeding. Experts do agree on one thing, take
omega 3 acids from foods rather than supplements.
Without a doubt, having enough Omega 3 acids in your diet does improve health.
DHA and EPA fatty acids are obtained from oily fish. ALA is from walnuts, soybeans, flax, Olive oil etc. The only source I know of which can supply EPA/DHA rather than fish, is egg yolks. 2 a day is supposed to be adequate.