Their speculation was confirmed when they visited Greenland and found that the Inuits ate large amounts of whale blubber, seal fat, walrus fat and some fish, all of which are rich in n-3 polyunsaturated fatty acids, while on Denmark and the US were consuming large amounts of plant seed oils rich in the n-6 fatty acids. This stimulated many investigators to seek antiatherosclerotic effects of n-3 fatty acids. Although it has been shown that the n-3 fish oil fatty acids can cause many biochemical and physiologic effects, which in humans would be expected to reduce atherosclerosis, the evidence from short term clinical trials that they do so is still minimal.