Component
Human chromatic contrast performance
Human chromatic contrast performance. Species, exposure and limitations are retained in each linked claim.
1 recorded relationships. Experimental role, claim status and evidence remain attached to each record.
How nutrients influence it
Every nutrient with a recorded effect on this component, credited to the nutrient that acted rather than the chapter that recorded it. Open a nutrient to see the findings and the conditions they were measured under.
Other things that act on it
Enzymes, hormones, genes, and other components with a recorded effect. These are not nutrients, so they do not count toward the arrows above. Each finding names the chapter that recorded it.
How nutrients reach it in more than one step
Chains of two or more recorded steps that end here, grouped by the nutrient they start from. Each step is a separate finding, so a chain is a route a mechanism could take, not proof that it does.
Tracing routes…
What it does
Every recorded relationship this component is part of, grouped by its role. Plain wording comes first; the technical statement follows.
What acts on it
L+Z improved the tested chromatic-contrast threshold versus placebo.
Experimental context and source evidence
- evidence_span
- {"source_cache": "artifacts/lutein-research/25468896.abstract.txt", "locator": "Primary indexed abstract; zero-based, end-exclusive Unicode character offsets", "file_sha256": "01231d6577e7c30e79a74525772191092df003b42344095a53faf0279f138ac3", "start_char": 0, "end_char": 2007, "text_sha256": "01231d6577e7c30e79a74525772191092df003b42344095a53faf0279f138ac3"}
- experimental_model
- Randomized double-blind placebo-controlled visual-performance study
- exposure
- Lutein 10 mg + zeaxanthin 2 mg daily for one year
- limitations
- Combined intervention; improved task performance is not evidence of AMD prevention or treatment.
- nutrient_topic
- Lutein research collection; topical membership is not evidence of a direct dietary effect. · Lutein
- organism
- 115 young healthy adults
- plain_language
- Participants detected the test contrast better.
- primary_references
- [lutein-p25468896] A double-blind, placebo-controlled study on the effects of lutein and zeaxanthin on photostress recovery, glare disability, and chromatic contrast. (2014). https://pubmed.ncbi.nlm.nih.gov/25468896/ DOI: 10.1167/iovs.14-15573
- tissue_or_cell_type
- Serum, macular pigment and visual tasks
Lutein: metabolism, signaling and nutrient connections (2026-09-17) · lines 866–877
AI-assisted literature curation; primary study URLs and scope retained in the document and extraction. Not publisher full text. · supports · Randomized double-blind placebo-controlled visual-performance study · source_derived_draft · unverified_draft
### lutein-contrast-improvement L+Z improved the tested chromatic-contrast threshold versus placebo. Condition category: normal nutrient_topic: Lutein research collection; topical membership is not evidence of a direct dietary effect. plain_language: Participants detected the test contrast better. organism: 115 young healthy adults tissue_or_cell_type: Serum, macular pigment and visual tasks experimental_model: Randomized double-blind placebo-controlled visual-performance study limitations: Combined intervention; improved task performance is not evidence of AMD prevention or treatment. exposure: Lutein 10 mg + zeaxanthin 2 mg daily for one year evidence_span: {"source_cache": "artifacts/lutein-research/25468896.abstract.txt", "locator": "Primary indexed abstract; zero-based, end-exclusive Unicode character offsets", "file_sha256": "01231d6577e7c30e79a74525772191092df003b42344095a53faf0279f138ac3", "start_char": 0, "end_char": 2007, "text_sha256": "01231d6577e7c30e79a74525772191092df003b42344095a53faf0279f138ac3"} [lutein-p25468896] A double-blind, placebo-controlled study on the effects of lutein and zeaxanthin on photostress recovery, glare disability, and chromatic contrast. (2014). https://pubmed.ncbi.nlm.nih.gov/25468896/ DOI: 10.1167/iovs.14-15573
Complete structured claim and evidence
The events it takes part in
A mechanism often involves more than two components. These are the full events, with every participant and its role.
Situations it appears in
Low-supply and faulty-machinery situations recorded in the chapters where this component plays a part.
In the sources
Preserved passages that mention this component, quoted exactly. Open one to read it in context.
Open hypotheses
Proposed ideas that involve this component. They are labeled as hypotheses and do not change any recorded statement.
This is a research prototype built from draft material. It is not medical advice, and its statements still await verification against the original studies.