Component
Erythrocyte methemoglobin concentration
Measured process or biological entity; consult each linked claim for the experimental scope.
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
Methemoglobin was higher in erythrocytes from the marginally B2-deficient group; the other tested endpoints did not all differ from controls.
Experimental context and source evidence
- availability_state
- nutrient_deficiency Imported condition classification; unverified.
- experimental_model
- Erythrocytes from marginally riboflavin-deficient people and controls separated into nine density fractions.
- exposure
- Red-cell age-fraction enzyme/cofactor assays, glutathione, hemoglobin species and peroxide susceptibility; observational comparison.
- limitations
- Does not identify a single responsible reductase or prove clinically significant anemia/hemolysis in each person.
- nutrient_topic
- Riboflavin research collection; topical membership is not evidence of a direct dietary effect. · Riboflavin (vitamin B2)
- organism
- Homo sapiens
- plain_language
- The study found a specific hemoglobin oxidation change, not failure of every antioxidant measure.
- primary_references
- [b2-powers1981] Riboflavin deficiency in man: effects on haemoglobin and reduced glutathione in erythrocytes of different ages (1981). https://pubmed.ncbi.nlm.nih.gov/7284295/ DOI: 10.1079/bjn19810031
- tissue_or_cell_type
- Human clinical setting
- trigger_kind
- nutrient_deficiency Imported condition classification; unverified.
Riboflavin: mechanisms, deficiency and nutrient interactions (2026-09-17) · lines 1705–1715
AI-assisted literature curation; primary study URLs and scope retained in the document and extraction. Not publisher full text. · supports · Erythrocytes from marginally riboflavin-deficient people and controls separated into nine density fractions. · source_derived_draft · unverified_draft
### b2-deficiency-methemoglobin Methemoglobin was higher in erythrocytes from the marginally B2-deficient group; the other tested endpoints did not all differ from controls. Condition category: nutrient_deficiency nutrient_topic: Riboflavin research collection; topical membership is not evidence of a direct dietary effect. plain_language: The study found a specific hemoglobin oxidation change, not failure of every antioxidant measure. organism: Homo sapiens tissue_or_cell_type: Human clinical setting experimental_model: Erythrocytes from marginally riboflavin-deficient people and controls separated into nine density fractions. limitations: Does not identify a single responsible reductase or prove clinically significant anemia/hemolysis in each person. exposure: Red-cell age-fraction enzyme/cofactor assays, glutathione, hemoglobin species and peroxide susceptibility; observational comparison. [b2-powers1981] Riboflavin deficiency in man: effects on haemoglobin and reduced glutathione in erythrocytes of different ages (1981). https://pubmed.ncbi.nlm.nih.gov/7284295/ DOI: 10.1079/bjn19810031
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.