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Regulation of vitamin A content and color of egg yolk through the feed

Regulation of vitamin A content and color of egg yolk through the feed

K Lantbrukshogskolan Statens Husdjursforsok Forhandsmeddelande 152: 23-25

Hens were fed mash to which had been added lucerne flour, yellow corn, or synthetic carotinoids, to improve the color of the egg yolk. A good yellow color was obtained when about 3% lucerne flour or 0.025 - 0.030% synthetic carotinoid was added to the feed. Feed containing 15% yellow corn did not give satisfactory yolk color, as had been expected. The vitamin A content of the yolk was highest (2400 - 2700 IE/100 g) when a stabilized synthetic vitamin A was added to the feed, as compared to lucerne as the sole supply of vitamin A (2000 IE/100 g).

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