“…The main representatives of polyunsaturated fatty acids are omega-3 (docosahexaenoic acid, alpha-linolenic acid, eicosapentaenoic acid) and omega-6 (arachidonic acid, linoleic acid). Polyunsaturated fats improve the rheological properties of blood, reduce the level of cholesterol deposits on blood vessel walls, protect cellular membrane lipids from oxidation, and lower triglyceride levels (47,48). New technologies are being developed to produce omega-3 and omega-6 from by-products of the fish industry, which will help reduce the cost of the final products (49).…”