Carotenoids are incorporated into the diet of laying hens in order to modify the yolk color. A natural source of carotenoids in tropical countries is annatto, which could be used in the diets of hens.

Yellow 5 can cause skin rashes, itching, and hives, especially in people who are sensitive to aspirin or have skin problems like hives. Some studies suggest Yellow 5 and other food dyes might make ...

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