Eating fish could help you live at least two years longer, claim researchers. Older people who have higher blood levels of omega-3 fatty acids found in oily fish and seafood cut their risk of dying prematurely by a quarter. U.S. scientists also found the risk of dying from heart disease was reduced by one third compared with adults who had lower blood levels of fatty acids. Fish provides omega-3 fatty acids which are essential for brain development and which are also thought to reduce inflammation of the brain, cardiovascular system and other cells. The human body cannot produce omega-3 fatty acids and the best dietary source is oily fish. Types of fish that contain high levels include tuna, salmon, mackerel, herring, sardines, and anchovies.