Tocopherols, carotenoids and phenolics changes during Andean lupin (Lupinus mutabilis Sweet) seeds processing

Andean lupin (L. mutabilis) seeds, appreciated for their high protein and unsaturated lipid content, must undergo water debittering to eliminate alkaloids. The aim of this research was investigate the effects further technological treatments such as extrusion spray-drying (with two different coating agents, gum Arabic maltodextrin, at 6% w/w) on antioxidants three ecotypes. Tocopherols (mainly ?-tocopherol) free phenolics (flavonoids, phenylethanoids, phenolic acids) were abundant in bitter while carotenoids scarce. After debittering, content tocopherols bound flavonoids slightly increased, unchanged but acids decreased by 76.2% 50.1%. Compared debittered samples, did not modify tocopherols, increased marginally reduced (14.5%) carotenoids. Spray-drying diminished (30.0%, 35.4% 48.4%), mainly because processing conditions; agent dilution effect minimal. No differences between agents observed. Nevertheless, debittered, extruded spray-dried flours total tocopherol (319, 318, 211 mg/kg DM) (1033, 1179, 531 contents still high. In all flours, represented majority (79.8%–95.6%). Processed L. mutabilis present valuable levels antioxidant compounds.