The Claim
Macular pigment optical density does not influence yellow-blue color discrimination thresholds in healthy adults, regardless of lutein and/or zeaxanthin supplementation.
What the research says
Supports is higher
Support is ahead, but a single strong opposing study can change this.
These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.
The amount of yellow pigment in the center of the eye does not change how well healthy adults distinguish between yellow and blue colors, even when they take supplements that increase this pigment.
See the scientific wording
Yellow-blue color discrimination thresholds in healthy adults are not influenced by macular pigment optical density, even after supplementation with lutein and/or zeaxanthin, suggesting that blue light absorption by macular pigment does not significantly alter this aspect of color vision.
Yellow and blue colors are detected by different types of light-sensitive cells in the eye. A natural yellow pigment in the center of the eye blocks some blue light before it reaches these cells. Even when this pigment becomes thicker from supplements, the balance of signals between the blue and yellow-sensitive cells stays the same, so the ability to tell yellow and blue apart does not change.
What the research says
1 studyEven when people took supplements that made the yellow pigment in the center of their eyes thicker, they still couldn't tell blue and yellow apart any better than before. So, that pigment doesn't affect how well we see those colors.
Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.