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Objectives Monounsaturated fatty acids (MUFA),fatty acids having only 1 double bond,are found in greatest amounts in vegetable oils,nuts and are also part of most animal fats.The most common monounsaturated fatty acids (MUFA) in daily nutrition is oleic acid,which represents more than 90 ％of all MUFA in the diet.Recent 2015-2020 dietary guidelines for Americans recommended replacing saturated fats with plant sources of monounsaturated fats,which might attribute to the potential benefit of MUFA in the primary and secondary prevention of cardiovascular diseases.Moreover,evidence from cohort studies have demonstrated improved peripheral insulin sensitivity following MUFA-rich diets in both healthy and diabetic participants.