In the modern nutrition, the appropriate omega-6/omega-3 ratio has shifted towards omega-6 fatty acids. To counterbalance this, among many other things, omega-3 consumption is recommended. (1)
EPA and DHA are both essential (the body needs them but cannot produce them, so they must be obtained from external sources). EPA and DHA contribute to the proper functioning of the heart. This beneficial effect can be achieved with a daily intake of 250 mg of EPA and DHA*.
* Scientifically proven claims approved by the European Food Safety Authority (EFSA).
(1) 25 March 2010: Scientific Opinion on Dietary Reference Values for fats, including saturated fatty acids, polyunsaturated fatty acids, monounsaturated fatty acids, trans fatty acids, and cholesterol | EFSA (europa.eu)