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The formation of hazardous substances, heterocyclic aromatic amines (HAAs) and two representative advanced glycation end products (AGEs), Nε-carboxymethyl-lysine (CML) and Nε-carboxyethyl-lysine (CEL) in five kinds of fish with different fat contents during thermal processing was investigated. The results indicated that HAAs, AGEs produced is related to the lipids in varying degrees. The variation of key precursors were examined to explain the relationship between fat oxidation and molecular pathway of HAAs and AGEs formation. The current research may help us better understand the overall generation of hazardous substances in food systems, and provide new ideas for formulating prevention in future production. [ABSTRACT FROM AUTHOR]

• A novel route was developed to inhibit HAAs and AGEs in roasted mackerel by adding vegetable extracts. • Vegetable extracts can not only promoting quality and avoiding nutrition loss of mackerel. • Variation of precursors revealed the involved HAAs inhibition mechanism. The formation of hazardous substances, heterocyclic aromatic amines (HAAs) and advanced glycation end products (AGEs), in roasted mackerel with different cooking temperatures (180, 210, 240 °C) and vegetable extracts (celery, carrot and yam extracts) in a preheated oven was investigated. The results indicated that the introduction of vegetable extracts had inhibitory effects on HAAs and AGEs during thermal processing, especially celery extracts. Benefiting from the addition of vegetable extracts, the roasted mackerel keep high quality against lipid/protein oxidation, avoids nutrition loss of polyunsaturated fatty acids, and flavor is promoted. We also examined the variation of key precursors, including creatine, creatinine, reducing sugars, amino acids and attempted to explain the molecular pathway of inhibition of the formation of the hazardous substances by vegetable extracts. The results provide theoretical support to develop technologies for inhibiting hazardous substances formation during fish processing, which is important for food manufacturers and consumers for producing healthier meat products. [ABSTRACT FROM AUTHOR]

The large yellow croaker (Pseudosciaena crocea) is one of the most commercially important marine fish in China and is a fixture at Chinese tables. Herein, we determined the formation of heterocyclic aromatic amines (HAAs) in roasted yellow croaker and evaluated the inhibitory effect of natural fruits extracts (blueberry extract, acerola cherry extract and grape seed extract) on the formation of HAAs in roast yellow croaker. All the three fruit extracts treatments minimize the amount of HAAs and the addition of blueberries extracts is the most effective approach on reducing the total HAAs content, which caused a signification reduction of 94.85% and 71.15% of the Norhaman and PhIP content, respectively, led IQ, 8-MeIQX, 4,8-DiMeIQX below the detected limitation, compared to the control group. Furthermore, antioxidant index of fruits extracts, precursors (free amino acids, creatine, creatinine and glucose) of HAAs, lipid and protein oxidation, flavor changes are evaluated to determine the mechanism and physical/chemical changes of fruit extracts on the formation of HAAs. This research develops a new method to minimize the amount of HAAs, which is helpful to food manufacturers for the production of healthier yellow croaker products and may be applicable to various meat systems. • The formation of HAAs in roasted large yellow croaker was determined. • Various fruits extracts could inhibit HAAs in roast large yellow croaker. • Fruits extracts positively affected lipid/protein oxidation and content of precursors. • Flavor changes are introduced to determine the possible mechanism involved. [ABSTRACT FROM AUTHOR]