Abstract: There is substantial evidence that regular intake of n-3 PUFA minimises the risk of various chronic diseases prevalent in developed nations. On the other hand, the available data on the intake of these fatty acids in developed nations indicate that the per capita intake of these PUFA is far below the recommended daily intake (RDI). For instance, data extracted from the National Nutrition Survey, conducted in Australia in 1995, showed that Australians were consuming less than half their RDI. This is in large part due to the low level of fish and seafood in Western-style diet, in which livestock products like meat and milk are the staple ingredients. CSIRO and other institutions around the world have been looking at ways of increasing the n-3 PUFA content of livestock products. This seminar will provide some highlights of CSIRO's research in modifying the fatty acid profiles of meat and milk through supplementing livestock with dietary lipids of vegetable and marine origin.