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Astaxanthin additions to animal diets predominantly serve as colorization aid to satisfy consumer expectations and desire for a consistent product with familiar coloration, e.g. the characteristic pink colorization of the flesh of species being produced by aquaculture. The heterobasidiomycetous yeast Phaffia rhodozyma (Xanthophyllomyces dendrorhous) can be used as natural feed source of astaxanthin...
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