Meta Information
ID:choline
Name:
Schema Version:2.4_uniform_evidence_2026_06_18
Created
2026-05-21T22:30:00Z
Model
phase-a-upgrade-claude-sonnet-4.6
Interactions
Target id:
/condition/pregnancy
Target name:
Pregnancy
Severity:
major
Interaction type:
requirement
Nature:
absolute
Temporal spacing:
Hours before target:
0
Hours after target:
0
Description:
Choline requirements increase significantly during pregnancy for proper fetal brain and neural tube development. Inadequate intake is common and supplementation is often recommended to support the health of both mother and child.
Actionable advice:
Adequate choline intake through diet and/or supplements should be maintained during pregnancy, as advised by a doctor.
Validation status:
anecdotal
Evidence tier:
tier_d
Evidence basis:
anecdotal_summary
Evidence anchors:
Exact phrase from label:
Choline is an essential nutrient produced by humans and animals and is important during pregnancy, fetal growth, and the development of the brain and nervous system.
Label source:
Anecdotal: NCBI
Action type:
informational_none
Target id:
/condition/lactation
Target name:
Breastfeeding (Lactation)
Severity:
major
Interaction type:
requirement
Nature:
absolute
Temporal spacing:
Hours before target:
0
Hours after target:
0
Description:
Large amounts of choline are transferred into breast milk to support infant development, dramatically increasing maternal needs. Supplementation may be necessary to avoid maternal depletion and ensure sufficient supply for the infant.
Actionable advice:
High choline intake should be maintained while breastfeeding to support both maternal health and the baby's development.
Validation status:
unvalidatable
Evidence tier:
tier_e
Evidence basis:
unvalidatable
Evidence anchors:
Source url:
Scientific literature support not found
Exact phrase from label:
Label source:
Action type:
informational_none
Target id:
/class/anticholinergic-medications
Target name:
Anticholinergic Medications
Severity:
moderate
Interaction type:
diminishing
Nature:
absolute
Temporal spacing:
Hours before target:
0
Hours after target:
0
Description:
Anticholinergic drugs (e.g., for overactive bladder, some older antihistamines) work by blocking acetylcholine, while choline is a precursor used to create acetylcholine. Taking them together may reduce the effectiveness of the anticholinergic medication.
Actionable advice:
It is important to consult a doctor before combining choline with anticholinergic drugs, as it may oppose their intended effect.
Validation status:
validated_via_class_inference
Evidence tier:
tier_c
Evidence basis:
class_inference_summary
Evidence anchors:
Source url:
Established mechanism / class pharmacology (no single primary source quoted)
Exact phrase from label:
Pharmacodynamic inference: choline is an acetylcholine precursor, so anticholinergic drugs act in functional opposition to its cholinergic effect. Plausible PD antagonism; not a quantified or labeled interaction.
Label source:
Class inference
Action type:
informational_none
Target id:
/class/cholinesterase-inhibitors
Target name:
Cholinesterase Inhibitors
Severity:
moderate
Interaction type:
adverse
Nature:
absolute
Temporal spacing:
Hours before target:
0
Hours after target:
0
Description:
Both choline and cholinesterase inhibitors (e.g., donepezil for Alzheimer's, Huperzine A) increase acetylcholine levels. Combining them can lead to an excessive cholinergic effect, causing side effects like nausea, diarrhea, and slowed heart rate.
Actionable advice:
High-dose choline is best avoided with cholinesterase inhibitors unless directed by a physician.
Validation status:
validated_via_class_inference
Evidence tier:
tier_c
Evidence basis:
class_inference_summary
Evidence anchors:
Source url:
Established mechanism / class pharmacology (no single primary source quoted)
Exact phrase from label:
Pharmacodynamic inference: combining a choline precursor (more ACh substrate) with a cholinesterase inhibitor (slower ACh breakdown) could additively raise cholinergic tone. Mechanistic, unstudied as a combination.
Label source:
Class inference
Action type:
avoid
Target id:
/intervention/l-carnitine
Target name:
L-Carnitine
Severity:
moderate
Interaction type:
adverse
Nature:
absolute
Temporal spacing:
Hours before target:
0
Hours after target:
0
Description:
Gut bacteria can convert both choline and L-carnitine into TMA, which is then converted to TMAO in the liver. High doses of both supplements taken together may significantly elevate TMAO, a metabolite linked to cardiovascular risk.
Actionable advice:
High doses of choline and L-carnitine are best not taken concurrently, and alternating them may be warranted if both are needed.
Validation status:
validated_via_primary_literature
Evidence tier:
tier_b
Evidence basis:
primary_literature_verbatim
Evidence anchors:
Source url:
Exact phrase from label:
Trimethylamine (TMA) is a gut microbiota-derived metabolite which comes from diets rich of choline, betaine or L-carnitine and could be further converted to Trimethylamine-N-oxide (TMAO) in the liver. As the function of gut microbiota and its metabolites being explored so far, studies suggest that TMAO may be a potential risk factor of cardiovascular diseases independent of other traditional risk factors.
Label source:
PubMed: Trimethylamine/Trimethylamine-N-Oxide as a Key Between Diet and Cardiovascular Diseases. (PMID 34003426)
Action type:
avoid
Target id:
/intervention/methotrexate
Target name:
Methotrexate
Severity:
moderate
Interaction type:
requirement
Nature:
absolute
Temporal spacing:
Hours before target:
0
Hours after target:
0
Description:
Methotrexate, a drug for cancer and autoimmune disease, can impair the body's own production of choline, thereby increasing the dietary requirement for it to prevent deficiency and potential liver toxicity.
Actionable advice:
If taking methotrexate, discuss with your doctor whether choline supplementation is necessary.
Validation status:
validated_via_class_inference
Evidence tier:
tier_c
Evidence basis:
class_inference_summary
Evidence anchors:
Source url:
Established mechanism / class pharmacology (no single primary source quoted)
Exact phrase from label:
Mechanistic inference: methotrexate (an antifolate) impairs one-carbon/methyl metabolism that supports endogenous choline (PEMT) synthesis, plausibly raising choline requirement and hepatic-steatosis risk. Well-described nutritionally; rendered as class inference (ODS Choline sheet discusses this but exact verbatim not quoted here).
Label source:
Class inference
Action type:
informational_none
Target id:
/intervention/vegan-diet
Target name:
Vegan Diet
Severity:
moderate
Interaction type:
requirement
Nature:
absolute
Temporal spacing:
Hours before target:
0
Hours after target:
0
Description:
Vegan diets lack major dietary sources of choline such as eggs, beef, and fish, increasing the risk of inadequacy and raising the need for targeted food choices or supplementation.
Actionable advice:
If following a vegan diet, consider regular choline supplementation to meet daily requirements.
Validation status:
validated_via_class_inference
Evidence tier:
tier_c
Evidence basis:
class_inference_summary
Evidence anchors:
Source url:
Established mechanism / class pharmacology (no single primary source quoted)
Exact phrase from label:
Nutritional fact (class inference): the richest choline sources are eggs, beef, fish and poultry, so vegan diets carry a higher risk of inadequate choline intake. Established; ODS Choline sheet lists these as top sources.
Label source:
Class inference
Action type:
informational_none
Target id:
/condition/renal-impairment
Target name:
Renal Impairment
Severity:
moderate
Interaction type:
adverse
Nature:
absolute
Temporal spacing:
Hours before target:
0
Hours after target:
0
Description:
The kidneys are responsible for clearing choline metabolites like TMAO. In individuals with poor kidney function, high-dose choline supplementation can lead to the accumulation of these metabolites and a pronounced fishy body odor.
Actionable advice:
It is important to consult a physician before using choline supplements for those with kidney disease.
Validation status:
validated_via_primary_literature
Evidence tier:
tier_b
Evidence basis:
primary_literature_verbatim
Evidence anchors:
Source url:
Exact phrase from label:
As anticipated, accumulation of circulating TMAO was accompanied by a decrease in renal clearance... both decreased renal clearance and increased hepatic production of TMAO may contribute to increments in serum TMAO in the setting of CKD.
Label source:
Johnson et al. (CKD model), PMID 29915157. Supports impaired renal clearance -> TMAO accumulation. FLAG: mouse CKD model; and the 'fishy odor' in the row is trimethylaminuria (TMA), a different metabolite than TMAO - odor mechanism is mis-attributed.
Action type:
informational_none
Target id:
/condition/pemt-mthfr-polymorphism
Target name:
PEMT or MTHFR Genetic Variants
Severity:
moderate
Interaction type:
requirement
Nature:
absolute
Temporal spacing:
Hours before target:
0
Hours after target:
0
Description:
Common genetic variations in the PEMT or MTHFR genes can impair the body's ability to produce or utilize choline and related nutrients, increasing the dietary requirement.
Actionable advice:
If you have known PEMT or MTHFR variants, you may require a higher choline intake; consult a knowledgeable practitioner.
Validation status:
validated_via_primary_literature
Evidence tier:
tier_b
Evidence basis:
primary_literature_verbatim
Evidence anchors:
Source url:
Exact phrase from label:
Common single nucleotide polymorphisms (SNPs) change dietary requirements for choline intake... We identified 5 SNPs in MTHFR that altered the slope of the intake-metabolite concentration relations, and we identified 2 SNPs in PEMT that shifted these curves upward.
Label source:
Fischer et al., Am J Clin Nutr (2010), PMID 20534746. Directly supports PEMT/MTHFR variants altering choline requirement.
Action type:
informational_none
Target id:
/condition/fatty-liver-disease
Target name:
Non-alcoholic Fatty Liver Disease (NAFLD)
Severity:
moderate
Interaction type:
synergistic
Nature:
absolute
Temporal spacing:
Hours before target:
0
Hours after target:
0
Description:
Choline is essential for packaging and transporting fat out of the liver. A deficiency can contribute to fat accumulation, and supplementation may support liver health in NAFLD.
Actionable advice:
It is a good idea to maintain adequate choline intake as part of a comprehensive plan to manage fatty liver disease.
Validation status:
validated_via_primary_literature
Evidence tier:
tier_b
Evidence basis:
primary_literature_verbatim
Evidence anchors:
Source url:
Exact phrase from label:
BACKGROUND: There is significant histologic and biochemical overlap between nonalcoholic fatty liver disease (NAFLD) and steatohepatitis associated with choline deficiency.
Label source:
PubMed: Choline intake in a large cohort of patients with nonalcoholic fatty liver disease. (PMID 22338037)
Action type:
informational_none
Target id:
/intervention/folate
Target name:
Folate (Vitamin B9)
Severity:
moderate
Interaction type:
synergistic
Nature:
absolute
Temporal spacing:
Hours before target:
0
Hours after target:
0
Description:
Choline and folate are metabolically linked in the one-carbon cycle. Adequate levels of one can help compensate for a mild deficiency in the other, and together they support healthy homocysteine levels.
Actionable advice:
It is a good idea to maintain adequate folate intake when supplementing with choline for optimal metabolic function.
Validation status:
validated_via_primary_literature
Evidence tier:
tier_b
Evidence basis:
primary_literature_verbatim
Evidence anchors:
Source url:
Exact phrase from label:
Methylation potential, shaped by nutrients involved in one-carbon metabolism, intersects with immune signaling and dopaminergic receptor, creating a broader metabolic network through which early life nutrition may alter neurobehavioral outcomes. We have shown that methyl nutrient imbalance between folic acid and choline during pregnancy produces offspring with higher body weight and perturbed methylation potential.
Label source:
PubMed: Prenatal Methyl Nutrient Availability Shapes Mesolimbic Dopaminergic Circuitry and Systemic Inflammation in Wistar Rat Offspring of Both Sexes. (PMID 42141807)
Action type:
informational_none
Target id:
/intervention/vitamin-b12
Target name:
Vitamin B12
Severity:
moderate
Interaction type:
synergistic
Nature:
absolute
Temporal spacing:
Hours before target:
0
Hours after target:
0
Description:
Vitamin B12 is a critical cofactor in the metabolic pathway that links choline and folate metabolism. A deficiency in B12 can impair this cycle and increase the need for choline.
Actionable advice:
Adequate Vitamin B12 status is best maintained for choline to be utilized effectively in methylation pathways.
Validation status:
validated_via_pubmed
Evidence tier:
tier_b
Evidence basis:
pubmed_abstract_verbatim
Evidence anchors:
Source url:
Exact phrase from label:
Choline use may also increase, and choline deficiency may worsen if choline substitutes when the vitamin B12 side of the homocysteine metabolic pathway cannot be used.
Label source:
PubMed: JPEN. Journal of parenteral and enteral nutrition (2002)
Source url:
Exact phrase from label:
Vitamin B12 is an essential nutritional co-factor for the folate and methionine cycles, which together constitute one-carbon metabolism.
Label source:
PubMed: Nature communications (2024)
Source url:
Exact phrase from label:
Further exploration of homocysteine metabolism in glaucoma animal models demonstrates early and sustained dysregulation of genes involved in one-carbon metabolism and the interaction of essential cofactors and precursors (B6, B9, B12, and choline) in whole retina and optic nerve head and RGCs.
Label source:
PubMed: Cell reports. Medicine (2025)
Action type:
informational_none
Target id:
/intervention/betaine
Target name:
Betaine (TMG)
Severity:
moderate
Interaction type:
synergistic
Nature:
absolute
Temporal spacing:
Hours before target:
0
Hours after target:
0
Description:
Betaine is a metabolite of choline and both can donate methyl groups to lower homocysteine. They work together, and adequate betaine can spare the body's choline stores from being used for this purpose.
Actionable advice:
Betaine (TMG) and choline can be taken together to support methylation and cardiovascular health.
Validation status:
validated_via_primary_literature
Evidence tier:
tier_b
Evidence basis:
primary_literature_verbatim
Evidence anchors:
Source url:
Exact phrase from label:
Choline is oxidized to betaine that serves as an osmoregulator and is a substrate in the betaine-homocysteine methyltransferase reaction, which links choline and betaine to the folate-dependent one-carbon metabolism.
Label source:
PubMed: Choline and betaine in health and disease. (PMID 20446114)
Action type:
informational_none
Target id:
/biomarker/homocysteine
Target name:
Elevated Homocysteine
Severity:
moderate
Interaction type:
synergistic
Nature:
absolute
Temporal spacing:
Hours before target:
0
Hours after target:
0
Description:
Choline, primarily through its conversion to betaine, plays a key role in converting potentially harmful homocysteine back into methionine, thus helping to lower elevated levels.
Actionable advice:
Choline supplementation can be an effective strategy for helping to manage high homocysteine levels.
Validation status:
validated_via_pubmed
Evidence tier:
tier_b
Evidence basis:
pubmed_abstract_verbatim
Evidence anchors:
Source url:
Exact phrase from label:
Elevated homocysteine concentrations can be caused by decreased methylation of homocysteine to form methionine, as occurs in folate deficiency. A parallel pathway exists for methylation of homocysteine, in which choline, by way of betaine, is the methyl donor.
Label source:
PubMed: The American journal of clinical nutrition (2005)
Source url:
Exact phrase from label:
The essential nutrients folate and choline (through betaine) are metabolically entwined to feed their methyl groups into C1-metabolism. A choline-deficient diet in rats produces a 31-40% reduction in liver folate content, 50% lower hepatic SAM levels, and a doubling of plasma homocysteine.
Label source:
PubMed: Nutrients (2025)
Source url:
Exact phrase from label:
Choline, a primary dietary source of methyl groups, converts Hcy to methionine and reduces age-dependent cognitive decline.
Label source:
PubMed: Molecular psychiatry (2020)
Action type:
monitor
Target id:
/class/choline-precursors
Target name:
Other Choline Forms (Alpha-GPC, Citicoline)
Severity:
moderate
Interaction type:
adverse
Nature:
absolute
Temporal spacing:
Hours before target:
0
Hours after target:
0
Description:
Alpha-GPC and Citicoline are potent sources of choline. Combining them with other choline supplements increases the total choline load, raising the risk of cholinergic side effects like headaches, GI upset, or a fishy body odor.
Actionable advice:
Only one form of choline supplement is best used at a time to avoid excessive intake.
Validation status:
validated_via_class_inference
Evidence tier:
tier_c
Evidence basis:
class_inference_summary
Evidence anchors:
Source url:
Established mechanism / class pharmacology (no single primary source quoted)
Exact phrase from label:
Pharmacological inference: alpha-GPC and citicoline are potent choline sources, so stacking them with other choline supplements raises total choline load and the risk of cholinergic side effects (headache, GI upset) and TMAO. FLAG: the cited PMID 42196986 is about GPC/TMAO, not additive cholinergic side effects - citation mismatch; mechanism is sound.
Label source:
Class inference
Action type:
avoid
Target id:
/condition/bipolar-disorder
Target name:
Bipolar Disorder
Severity:
minor
Interaction type:
adverse
Nature:
absolute
Temporal spacing:
Hours before target:
0
Hours after target:
0
Description:
While high-dose choline has been studied for mania, increasing acetylcholine levels could theoretically worsen depressive symptoms in some individuals with bipolar disorder.
Actionable advice:
Choline supplements are best used with caution and under medical supervision in the presence of bipolar disorder.
Validation status:
validated_via_class_inference
Evidence tier:
tier_c
Evidence basis:
class_inference_summary
Evidence anchors:
Source url:
Established mechanism / class pharmacology (no single primary source quoted)
Exact phrase from label:
Theoretical inference: choline raises brain acetylcholine; per the cholinergic-adrenergic balance hypothesis, increased cholinergic tone could theoretically worsen the depressive pole of bipolar disorder. FLAG: the cited PMID 6214943 actually frames cholinergic loading as a TREATMENT for mania, not a depressogenic risk - directional claim is not supported by that source; weak/theoretical.
Label source:
Class inference
Action type:
informational_none
Target id:
/condition/major-depressive-disorder
Target name:
Major Depressive Disorder
Severity:
minor
Interaction type:
adverse
Nature:
absolute
Temporal spacing:
Hours before target:
0
Hours after target:
0
Description:
There is a theoretical concern that increasing acetylcholine levels with choline supplementation could exacerbate symptoms in some individuals with depression. The evidence is not strong but warrants caution.
Actionable advice:
If you have depression, discuss choline supplementation with your doctor before starting.
Validation status:
validated_via_class_inference
Evidence tier:
tier_c
Evidence basis:
class_inference_summary
Evidence anchors:
Source url:
Established mechanism / class pharmacology (no single primary source quoted)
Exact phrase from label:
Theoretical inference: the cholinergic-overactivity hypothesis of depression suggests boosting acetylcholine could exacerbate depressive symptoms in susceptible individuals. Weak/theoretical, matching the row's own hedge; not demonstrated.
Label source:
Class inference
Action type:
informational_none