Adding marigold flower extract to chicken feed makes egg yolks more colorful and boosts a healthy nutrient called beta-carotene, which might make eggs look better to shoppers.

Pro

Against

Evidence from Studies

Supporting (1)

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Improvement in the Coloration and Quality of Japanese Quail Eggs Through Supplementation with Natural Pigments

Cohort Study

Animal

Contradicting (0)

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No contradicting evidence found

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According to GRADE and EBM methodology, here is what ideal scientific evidence would look like to definitively prove or disprove this specific claim, ordered from strongest to weakest evidence.

Source Study

Improvement in the Coloration and Quality of Japanese Quail Eggs Through Supplementation with Natural Pigments

Score: 11

DOI: 10.3390/poultry4020025

Similar Assertions

Giving Japanese quails food with a little bit of paprika or marigold extract makes their egg yolks more colorful, which people usually like better.

82%

Feeding quails natural plant pigments from paprika and marigolds might help keep their eggs fresher for longer by slowing down changes inside the egg as it's stored.

76%