Fish oil contains the so-called Omega 3 fatty acids (EPA eicosapentaenoic acid and DHA-docosahexaenoic acid) - concentrated polyunsaturated fatty acids that are ingested with food, and which the human body does not produce. Omega 3 fatty acids protect against many diseases. They reduce the level of cholesterol and triglycerides, which are responsible for heart disease and arteriosclerosis, but also reduce the risk of blood clots. Vitamin E as a strong antioxidant protects blood vessels from arteriosclerotic changes. Omega 3 fatty acids can improve depression and other mental illnesses.