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This study examined the retention of β-carotene in extruded corn-based formulations, as influenced by the delivery format of β-carotene and the die temperature (140, 160 or 170 °C) during twin-screw extrusion. The β-carotene was delivered via the liquid feed as (i) an oil-in-water emulsion stabilized by a heated protein-carbohydrate matrix; (ii) an oil-in-water emulsion stabilized by Tween 80 or (iii)...