Since our body cannot de novo synthesise fatty acids, they be consumed by diet. Fish oil is a major source of essential fatty acids, Omega 3 (ω−3) and Omega 6 (ω−6). This fatty acid prevents major heart diseases, cancer, diabetes, mental disorders, arthritis, and many other health problems. Fish oil therefore contributes a large number of beneficial effects to us. It must be used according to the recommended dosage. Consumption of 1.0g of fish oil per day will help the human being fight coronary heart disease. Fish oil supplements have many advantages over the direct consumption of fish.