Fish oil is a substance that can be found in fish and supplements. Known for its multitude of health benefits, fish oil is one supplement that no one should be without. The reason fish oil is so beneficial is because of its high omega-3 fatty acid (polyunsaturated fatty acids) content. This substance is needed to sustain and improve a huge variety of metabolic and health functions in the human body. Here is a brief overview on some of the amazing health benefits of fish oil.