Impact of Cooking Methods on Saturated Fat, Sodium, and Omega-3 Content in Animal-Based Foods: Implications for Cardiovascular Risk
Abstract
Carlos Scherr
Background: Excess intake of saturated fat and sodium contributes significantly to cardiovascular disease. Although dietary guidelines emphasize limiting these nutrients, the impact of cooking methods on nutrient composition remains poorly characterized.
Objective: To evaluate how different cooking methods influence saturated fat, sodium, and omega-3 fatty acid content in commonly consumed animal-based foods.
Methods: Twenty-nine foods of animal origin and two of plant origin were analyzed. The present study reports data for beef sirloin, poultry (chicken and Chester®, Gallus gallus domesticus), shrimp, and 10 fish species. Samples were prepared using standardized cooking methods, including grilling, frying, stewing, roasting, and boiling. Cooking temperature and preparation time were kept constant within each cooking method to ensure methodological consistency. Nutrient concentrations were determined under standardized laboratory conditions. Omega-3 concentrations were compared across cooking methods using the Kruskal–Wallis test. Comparisons of saturated fat content between beef preparations were performed using the Mann–Whitney U test. Statistical significance was defined as p < 0.05.
Results: Cooking methods significantly modified nutrient composition. Removal of visible fat from beef reduced saturated fat content by approximately 28%, whereas frying with added fat restored higher levels, resulting in values similar to those observed in preparations with visible fat. In poultry, saturated fat content differed by more than threefold according to the presence of skin and the cooking method. Fried shrimp preparations showed higher sodium concentrations compared with grilled preparations. Omega-3 levels in fish varied markedly across cooking methods, exceeding a 1000% variation within the same species; for example, sardine omega-3 content ranged from <0.01 to 1.48 g/100 g.
Conclusion: Cooking techniques can markedly influence nutrient composition and may affect dietary exposure to key cardiovascular risk factors. Cardiovascular risk is influenced not only by the type of food consumed but also by the method of preparation. Incorporating food preparation practices into dietary recommendations may improve adherence to heart-healthy dietary patterns by expanding food choices and promoting nutritional education.