Search

[Display omitted] • 23 major volatile aldehydes including the toxic substance Trans-4,5-epoxy-(E)-2-Decenal were detected. • Methionine, histidine, and glycine act as lipid antioxidants to reduce the production of volatile aldehydes. • Methionine had the most significant inhibitory effect on the production of volatile aldehydes. • Better unsaturated volatile aldehydes inhibiting was detected than saturated volatile aldehydes. This research aims to assess the effect of amino acids as lipid antioxidants in reducing the formation of volatile aldehydes in frying oil. Methionine, histidine, and glycine at concentrations of 2.5, 5, and 10 mM were added to high oleic sunflower oil (HOSO) to investigate their effects on the distribution and formation of saturated, monounsaturated, and polyunsaturated volatile aldehydes. The results showed that the proportion of saturated volatile aldehydes was greater than that of unsaturated ones; Methionine exhibited the best inhibitory effect, after 12 h of frying, 10 mM methionine reduced the content of saturated volatile aldehydes by 24.21 %, monounsaturated by 52.4 %, and polyunsaturated by 54.73 % compared to the control. Methionine's sulfur-containing side chain was also proven to have strong antioxidant activity. Combined with the results of this study, this can also provide insights for using amino acids as lipid antioxidants. [ABSTRACT FROM AUTHOR]