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Xanthophyll

Xanthophyll. A yellow-red carotenoid (q.v.) color pigment, also called lutein, found in the grain (q.v.) of wheat (q.v.) and carried over into flour (q.v.) in which it is responsible for the yellow cast of the freshly-milled product. Flour bleaching (q.v.) results in the oxidative destruction of the pigment by benzoil peroxide (q.v.), among other bleaching agents (q.v.).