Frankfurters formulated with either lard or diacylglycerol (DAG)-rich purified glycerolytic lard (PGL), with or without catechin, were vacuum-packed and stored at 4 °C for 28 days to evaluate their physicochemical and sensory properties. Results revealed that lard-based frankfurters exhibited significantly higher cooking loss (8.69 %) and released fat (0.63 %) compared to PGL-based frankfurters (5.13 % and 0.33 %) (P < 0.05). Over time, lard-based frankfurters experienced greater deterioration in color, texture, microstructure, and sensory quality, along with increased fat oxidation (0.18 to 1.54 mg/kg) and microbial growth (3.77 to 5.43 Log CFU/g) (P < 0.05). Notably, substituting lard with PGL significantly enhanced the L*-value, b*-value, texture, microstructure, and sensory quality during storage (P < 0.05). Furthermore, the inclusion of catechin in frankfurters further reduced cooking loss (8.69 to 6.74 % and 5.13 to 3.89 %) and released fat (0.63 to 0.54 % and 0.33 to 0.16 %) (P < 0.05) while improving color, texture, microstructure, and sensory quality (P < 0.05). Catechin also effectively inhibited fat oxidation (1.54 to 1.34 mg/kg and 1.86 to 1.51 mg/kg) and microbial growth (5.43 to 5.27 Log CFU/g and 5.37 to 5.09 Log CFU/g) in frankfurters during storage (P < 0.05). Overall, the incorporation of DAG and catechin improved the quality and shelf life of frankfurters during storage.
Traditional meat products are highly valued all over the world and their attractiveness depends on socio-economical, ethical and religious factors as well as on their organoleptic properties that confer unique textural, gustatory, and olfactory characteristics. Taste compounds are closely related to protein degradation processes as hydrophilic metabolites such as amino acids, peptides and nucleotides are main contributors to final taste in traditional meat products. In this review, the generation of main compounds related to taste in traditional meat products are described, specially umami and koku peptides generated from the protein fraction during the traditional processing of these products. The use of certain peptides to enhance product taste and benefit human health is also highlighted.

