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VITAMINS & SUPPLEMENTS · GUIDE

Choline and the Brain: Where the Nutrient Is Covered (Intake, Pregnancy, Deficiency)

A short guide to choline and the brain: official intake figures from Health Canada and EFSA, what studies of diet and cognition show, and where the full choline guide lives.

Content last updated . This page has not been medically reviewed.

Back to Choline: An Essential Nutrient (Not a B Vitamin), Sources and Supplements
Quick answer
Choline is an essential nutrient, and the full guide to it is on the Choline page. This page gives a short, brain-focused summary. Official bodies have set Adequate Intakes (AI), which are estimates, because a requirement could not be calculated. [1] Studies linking choline to thinking skills are mostly observational, and trials of choline supplements in adults have given inconsistent results. [1][2] Choline-related products such as citicoline and alpha-GPC are separate compounds: see Citicoline and Alpha-GPC.

Evidence labels: established nutritional role, promising but limited, mixed, insufficient evidence. See What are nootropics?.

Official intake levels (mg of total choline a day)

GroupAIULSource and year
Adult men, 19 and older (US and Canada)5503,500Health Canada, page dated 2025 [3]
Adult women, 19 and older (US and Canada)4253,500Health Canada, 2025 [3]
Pregnancy, 19 to 50 (US and Canada)4503,500Health Canada, 2025 [3]
Breastfeeding, 19 to 50 (US and Canada)5503,500Health Canada, 2025 [3]
Children 1 to 3 years (US and Canada)2001,000Health Canada, 2025 [3]
Infants 0 to 6 months (US and Canada)125not establishedHealth Canada, 2025 [3]
Adults and adolescents 15 to 17 (EU)400no figure on the page readEFSA, 2016 [4]
Pregnancy (EU)480no figure on the page readEFSA, 2016 [4]
Breastfeeding (EU)520no figure on the page readEFSA, 2016 [4]

All AI figures are for total choline from all forms. The US and Canada values were first set by the US Institute of Medicine; the upper limit for adults was based on low blood pressure seen at a much higher amount, with a safety factor applied. [1] Health Canada's table notes that few data exist to say whether a dietary supply of choline is needed. [3] The NIH Office of Dietary Supplements choline page could not be opened by us (access refused), so no figure from it is quoted. Intake above an AI implies a low chance of inadequate intake, but intake below it does not by itself show a deficiency. [1]

What studies show about choline and the brain

4 findings · 2 supported · 1 mixed · 1 limited or unclearThe colour follows the evidence label on each card.

  1. Diet and cognition in adults

    Mixed

    A 2018 review notes positive associations between dietary choline intake and cognitive performance, but inconsistent results from choline supplementation studies in adults. [1]

  2. Diet and dementia

    Promising but limited (observational)

    A US cohort of 5,301 people (average age 68.6) plus a meta-analysis of five cohorts: moderate dietary intake was associated with lower dementia risk, with an L-shaped pattern and a turning point at 465 mg a day. These are associations in food-based diets. [2]

  3. Memory supplements

    Promising but limited

    A 2023 review found some current evidence for memory benefit from choline, while noting weak scientific foundations for marketing claims. [5]

  4. Healthy adults taking choline supplements for focus

    Insufficient

    Proper evidence not found in the sources we read.

Association is not proof of cause: people who eat more choline-rich foods may differ in other ways.

Frequently asked questions

Is choline a B vitamin?

Choline is an essential nutrient. How it is classified is explained on the main choline guide.

How much choline do adults need?

Nobody can calculate a requirement; Health Canada lists AIs of 550 mg (men) and 425 mg (women) a day for the US and Canada, and EFSA lists 400 mg for EU adults. [3][4]

Does choline improve memory?

Studies linking dietary choline to cognition are observational and supplement trials in adults are inconsistent. [1]

Is citicoline the same as choline?

No; citicoline and alpha-GPC are related compounds covered in Citicoline and Alpha-GPC.

Does choline lower dementia risk?

One 2026 study found moderate dietary intake associated with lower risk, but that does not prove cause. [2] No supplement is proven to prevent Alzheimer's. [6]

More details: evidence, limits and cautions

The details behind this page: cautions, limits of the evidence and where sources disagree. Open any note to read it.

Foods, deficiency and pregnancy (where to read more)
  • Foods: the highest amounts are in liver, eggs, beef, fish, pork and chicken. [1] EFSA also lists whole grains, vegetables and fruit. [4] Full food lists are in Choline.
  • Deficiency: EFSA says choline deficiency can have adverse effects including fatty liver and liver and muscle damage. [4] Do not diagnose it from symptoms; a clinician decides.
  • Pregnancy: the AI is higher in pregnancy and breastfeeding (table above). A 2018 review reports an inverse relationship between neural tube defect risk and maternal choline intake or blood levels, independent of folate. [1] Ask your prenatal clinician; see pregnancy and breastfeeding.
Safety
More is not shown to be better. The US and Canadian adult UL rests on low blood pressure seen in a study at a much larger amount. [1] People with liver or kidney disease, on prescription medicines, pregnant or breastfeeding, or preparing for surgery should ask a clinician or pharmacist before adding choline: medication interactions, liver safety, supplements before surgery. Check totals across products (amounts and duplicate ingredients).
When to get help
Memory change that affects daily life needs medical evaluation: memory changes: when to get help.
References
  1. Wiedeman AM et al. Nutrients 2018. Dietary Choline Intake: Current State of Knowledge Across the Life Cycle. Read 2026-10-23.
  2. Chen H et al. Nutr J 2026. Dietary choline intake and incident dementia in middle-aged and older adults: a prospective cohort study and dose-response meta-analysis. Read 2026-10-23.
  3. Health Canada. Dietary reference intakes tables: reference values for vitamins. Page dated 2025-11-19. Read 2026-10-23.
  4. European Food Safety Authority (EFSA), Dietary reference values: EFSA publishes advice on choline. Published 17 August 2016. Read 2026-10-23.
  5. Hersant H et al. CNS Drugs 2023. Over the Counter Supplements for Memory: A Review of Available Evidence. Read 2026-10-23.
  6. National Institute on Aging, Preventing Alzheimer's Disease: What Do We Know?. Read 2026-10-23.
Education, not medical advice. This page is for general information. It does not diagnose or treat any condition and is not a substitute for care from a qualified health professional. Natural does not automatically mean safe. Ask a clinician or pharmacist before changing your care, especially if you take medication, are pregnant or breastfeeding, or have a health condition.