Investigation into the contents of nutrients, Nε-carboxymethyllysine and Nε-carboxyethyllysine in various commercially canned fishes to find the correlation between them

Abstract Ne-Carboxymethyllysine (CML) and Ne-carboxyethyllysine (CEL) are typical advanced glycation end-products (AGEs) found in foods, which have been linked to various health risks. Little is known about the formation of AGEs in different kinds of canned fishes and their connection with nutriment. In this study, the levels of general nutrients and AGEs in commercially canned fish products and the correlation between the two are investigated. High biological variation in CML and CEL levels was found between individual canned fish products. Particularly for the smallest amount of AGEs in canned mackerel, the CML is 0.53 mg/kg; the CEL is 18.8 mg/kg. On the contrary, canned dace has the highest content of AGEs, with a CML of 69.2 mg/kg; and a CEL of 244 mg/kg. A positive correlation of 0.61 was observed between 9C12C-C18:2 and CML in fatty acids. Protein has a positive correlation with CML and CEL at 0.46 and 0.73, respectively. Methionine (Met) and lysine (Lys) are negatively correlated with CML at -0.53 and -0.50, respectively. The results of this study indicated the possibility of predicting and controlling canned fish quality and AGEs formation according to their nutrient conditions.