Fish oil is one of those essential sources of omega-3 fatty acids. These consist of different components which are known to be good for heart health, brain, reduce inflammation, and provide relief to the joints and eyes. Here are the major nutrients that they contain. Fish oil is one of those essential sources of omega-3 fatty acids. These consist of different components which are known to be good for heart health, brain, reduce inflammation, and provide relief to the joints and eyes. Here are the major nutrients that they contain. Health and Fitness, Health Tips, Exercises & Workout Tips, Diet & Wellness | Times of India Lifestyle