Arabinoxylan-sodium caseinate conjugates enhanced oxidative stability of sodium caseinate stabilized oil-in-water...

To mitigate lipid oxidation in emulsion-based polyunsaturated fatty acid delivery systems, we designed sodium caseinate-arabinoxylan conjugates (AX-SC) via controlled Maillard reaction. Interfacial characterization demonstrated AX-SC's enhanced adsorption capacity compared to physical mixtures, with AXwheat/corn/rice-SC exhibiting concentration-dependent interfacial activity (zeta potential reduction), contrasting with AXrye-SC's limited efficacy. Stability thresholds were established at <0.5 % for AXwheat/corn-SC and < 0.3 % for AXrice/rye-SC to prevent colloidal destabilization. Oxidation analyses revealed AX-SC's multiphase antioxidant functionality, particularly 0.5 % AXrice-SC formulations showing 57.1 % and 85.6 % reductions in POV and TBARS values respectively versus control systems after 21-day storage. This study establishes AX-SC conjugates as bioengineered interfacial modifiers for delivery system with reduced oxidation rate.