Martikainen JA, Soini EJ, Laaksonen DE, Niskanen L. Health economic consequences of reducing salt intake and replacing saturated fat with polyunsaturated fat in the adult Finnish population: estimates based on the FINRISK and FINDIET studies. (nejm.org)
Individuals whose diets provide greater amounts of omega - 3 fatty polyunsaturated fatty acids — and cod is a good source of these essential fats — have lower blood pressure than those who consume less, shows data gathered in the International Study of Macro - and Micro-nutrients and Blood Pressure (INTERMAP) study (Ueshima H, Stamler J, et al.. (whfoods.org)
There aren't an excessive amount of polyunsaturated fats in your diet already. (thehealthyhomeeconomist.com)