The Claim

Dietary supplementation with 0.8% marigold flower extract in Japanese quail increases egg yolk color intensity and β-carotene concentration, with the highest β-carotene levels observed at a dosage of 40 g/kg, indicating enhanced potential for improving consumer-preferred egg yolk pigmentation.

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

What the research says

Supports is higher

Support is ahead, but a single strong opposing study can change this.

Supports
11score
Challenges
0score

These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.

Quantitative
1 study reviewed
In plain English

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.

See the scientific wording

Supplementation with 0.8% marigold flower extract in the diet of Japanese quail increases yolk color intensity and β-carotene concentration in egg yolks, with the marigold group showing the highest β-carotene levels at 40 g/kg, suggesting enhanced pigmentation potential for consumer-preferred egg appearance.

What the research says

1 study

  1. Study: Improvement in the Coloration and Quality of Japanese Quail Eggs Through Supplementation with Natural Pigments

    The study gave quails marigold extract in their food and found their egg yolks became more colorful and had more beta-carotene, just like the claim says.

Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies

Fit Body Science verdict — we translate health claims into clear verdicts backed by peer-reviewed research.

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