The hypotheses of the study are that if the feed are changed from a marine origin to primarily a vegetable origin the content of long chain n-3 poly unsaturated fatty acids (n-3 PUFA) will decrease in the meat and thus possibly result in a decreased effect on health. Furthermore, the feed of the trouts are also expected to give rise to differences in the human plasma protein profile and fatty acid composition after consumption, which could be associated with physiological effects.