The need of better labelling of fats in processed animal origin
products is urgent. The lack of information makes it possible to
exclude n-3 fatty acids in preparations of foods. The higher fat
content, the higher n-6/n-3 ratio seems to be a rule. It is
desirable to broaden the labelling into which oils have been used
when foods are processed. The dietary balance of n-6 and n-3
fatty acids is important for homeostasis and normal development
in humans. The ratio between n-6/n-3 fatty acids suggested to
be evolutionary developed is between 1 and 4. The main
conclusion is that the fat sources used during processing and
preparation of convenient foods have the largest impact on the
food FA content and composition. A proposal is therefore that
this should be declared on the product label especially the n-3 FA
content. It is also of large importance to increase consumption of
freshwater fish fed suitable feeds containing n-3 fatty acids in
central Europe to enable a generally lower n-6/n-3 ratio in the
human diet. Therefore optimizing feeds to freshwater fish in
culture is urgent and important.