Inhibition of Nε-(carboxymethyl)lysine and Nε-(carboxyethyl)lysine formation in air-fried beef tenderloins marinated with concentrated cranberry juice

The aim of this study was to investigate the effect of marinating beef tenderloin with concentrated cranberry juice on the formation of Nε-(carboxymethyl)lysine (CML) and Nε-(carboxyethyl)lysine (CEL). In order to achieve this, the concentrated cranberry juice was prepared from cranberry fruit and characterised. Subsequently, beef tenderloins were marinated at two different concentrations (25% and 50%) and three different marination times (2, 6 and 24 h), after which they were cooked in an airfryer at 200 °C for 12 min. Following the cooking process, CML, CEL, thiobarbituric acid reactive substances (TBARS) and colour were analysed. It was found that concentrated cranberry juice has high phytochemical and bioactivity properties. Cranberry juice was found to be high in total phenolic compounds (TPC), total flavonoid compounds (TFC), antioxidant activity and rich in bioactive compounds. It was found that cranberry juice significantly altered the colour properties (L*, a*, and b*) of raw beef tenderloin samples (p