Farmers add paprika and marigold to chicken food to make egg yolks look more orange because people think those eggs are healthier—even if they're not.
Evidence from Studies
Supporting (3)
Community contributions welcome
Effect of Dietary Carotenoid on Egg Yolk Color and Singlet Oxygen Quenching Activity of Laying Hens
The study shows that adding paprika and marigold to chicken feed makes egg yolks more orange, which is exactly what the claim says happens.
Impact of High-Dose Supplemental Paprika Extract Feeding on Egg Storage and Biochemical Parameters in Laying Hens
The study shows that adding paprika to chicken feed makes egg yolks more orange, which is exactly why farmers use it—even if the eggs aren’t actually more nutritious.
The study shows that adding paprika and marigold to bird feed makes egg yolks more orange, which people find more appealing, just like the claim says.
Contradicting (0)
Community contributions welcome
Gold Standard Evidence Needed
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.