The study looked at how different diets affect the fatty acid profile of rainbow trout. Three commercial diets were tested, showing varying levels of saturated, monounsaturated, and polyunsaturated fatty acids. The diets also differed in the amounts of EPA and DHA, important omega-3 fatty acids. The fish samples reflected the diets, with differences in the levels of specific fatty acids like palmitic acid, oleic acid, linoleic acid, EPA, and DHA. Overall, the study found that the fatty acid composition of the fish was influenced by the diets they were fed, with some variations due to metabolic effects.