Component
Choline partitioning between betaine and phosphatidylcholine
Allocation inferred from a specified tracer experiment.
2 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
In nonpregnant MTHFR rs1801133 carriers receiving 930 mg choline/day, the betaine-d9:PC-d9 enrichment ratio was 0.87, matching noncarriers receiving 480 mg/day (0.87); noncarriers receiving 930 mg/day had a ratio of 1.0.
Experimental context and source evidence
- availability_state
- machinery_impairment Imported condition classification; unverified.
- cross_nutrient
- Choline modifies a folate-genotype-associated phenotype.
- experimental_model
- Choline feeding and isotope tracing in women across reproductive states.
- exposure
- 480 versus 930 mg/day; recommended folate intake
- limitations
- The matched reference is noncarriers at 480 mg/day, not noncarriers at the same 930 mg/day; subgroup result, not universal restoration or dosing advice.
- nutrient_topic
- Folate and folic acid research collection; topical membership is not evidence of a direct dietary effect. · Folate (vitamin B9)
- organism
- Homo sapiens
- plain_language
- Higher intake brought carriers to the lower-intake noncarrier reference value.
- primary_references
- [ganz-2016] Genetic impairments in folate enzymes increase dependence on dietary choline for phosphatidylcholine production at the expense of betaine synthesis (2016). https://pubmed.ncbi.nlm.nih.gov/27342765/ DOI: 10.1096/fj.201500138rr
- tissue_or_cell_type
- Plasma tracer metabolites
- trigger_kind
- machinery_impairment Imported condition classification; unverified.
Folate and folic acid: mechanisms, deficiency and nutrient interactions (2026-09-17) · lines 743–754
AI-assisted literature curation; primary study URLs and scope retained in the document and extraction. Not publisher full text. · supports · Choline feeding and isotope tracing in women across reproductive states. · source_derived_draft · unverified_draft
### folate-methyl-choline-intake-variant In nonpregnant MTHFR rs1801133 carriers receiving 930 mg choline/day, the betaine-d9:PC-d9 enrichment ratio was 0.87, matching noncarriers receiving 480 mg/day (0.87); noncarriers receiving 930 mg/day had a ratio of 1.0. Condition category: machinery_impairment nutrient_topic: Folate and folic acid research collection; topical membership is not evidence of a direct dietary effect. plain_language: Higher intake brought carriers to the lower-intake noncarrier reference value. organism: Homo sapiens tissue_or_cell_type: Plasma tracer metabolites experimental_model: Choline feeding and isotope tracing in women across reproductive states. limitations: The matched reference is noncarriers at 480 mg/day, not noncarriers at the same 930 mg/day; subgroup result, not universal restoration or dosing advice. exposure: 480 versus 930 mg/day; recommended folate intake cross_nutrient: Choline modifies a folate-genotype-associated phenotype. [ganz-2016] Genetic impairments in folate enzymes increase dependence on dietary choline for phosphatidylcholine production at the expense of betaine synthesis (2016). https://pubmed.ncbi.nlm.nih.gov/27342765/ DOI: 10.1096/fj.201500138rr
Complete structured claim and evidenceNonpregnant MTHFR rs1801133 carriers had lower labeled betaine:phosphatidylcholine enrichment ratios than noncarriers (0.8 versus 0.9).
Experimental context and source evidence
- availability_state
- machinery_impairment Imported condition classification; unverified.
- cross_nutrient
- Folate-pathway genotype relates to choline allocation.
- experimental_model
- Choline feeding and isotope tracing in women across reproductive states.
- limitations
- Genotypes not randomized; ratio is a pathway proxy.
- nutrient_topic
- Folate and folic acid research collection; topical membership is not evidence of a direct dietary effect. · Folate (vitamin B9)
- organism
- Homo sapiens
- plain_language
- Relative choline allocation shifted toward phosphatidylcholine.
- primary_references
- [ganz-2016] Genetic impairments in folate enzymes increase dependence on dietary choline for phosphatidylcholine production at the expense of betaine synthesis (2016). https://pubmed.ncbi.nlm.nih.gov/27342765/ DOI: 10.1096/fj.201500138rr
- tissue_or_cell_type
- Plasma tracer metabolites
- trigger_kind
- machinery_impairment Imported condition classification; unverified.
Folate and folic acid: mechanisms, deficiency and nutrient interactions (2026-09-17) · lines 731–741
AI-assisted literature curation; primary study URLs and scope retained in the document and extraction. Not publisher full text. · supports · Choline feeding and isotope tracing in women across reproductive states. · source_derived_draft · unverified_draft
### folate-methyl-variant-choline-allocation Nonpregnant MTHFR rs1801133 carriers had lower labeled betaine:phosphatidylcholine enrichment ratios than noncarriers (0.8 versus 0.9). Condition category: machinery_impairment nutrient_topic: Folate and folic acid research collection; topical membership is not evidence of a direct dietary effect. plain_language: Relative choline allocation shifted toward phosphatidylcholine. organism: Homo sapiens tissue_or_cell_type: Plasma tracer metabolites experimental_model: Choline feeding and isotope tracing in women across reproductive states. limitations: Genotypes not randomized; ratio is a pathway proxy. cross_nutrient: Folate-pathway genotype relates to choline allocation. [ganz-2016] Genetic impairments in folate enzymes increase dependence on dietary choline for phosphatidylcholine production at the expense of betaine synthesis (2016). https://pubmed.ncbi.nlm.nih.gov/27342765/ DOI: 10.1096/fj.201500138rr
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.