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.
Evidence labels: established nutritional role, promising but limited, mixed, insufficient evidence. See What are nootropics?.
Official intake levels (mg of total choline a day)
| Group | AI | UL | Source and year |
|---|---|---|---|
| Adult men, 19 and older (US and Canada) | 550 | 3,500 | Health Canada, page dated 2025 [3] |
| Adult women, 19 and older (US and Canada) | 425 | 3,500 | Health Canada, 2025 [3] |
| Pregnancy, 19 to 50 (US and Canada) | 450 | 3,500 | Health Canada, 2025 [3] |
| Breastfeeding, 19 to 50 (US and Canada) | 550 | 3,500 | Health Canada, 2025 [3] |
| Children 1 to 3 years (US and Canada) | 200 | 1,000 | Health Canada, 2025 [3] |
| Infants 0 to 6 months (US and Canada) | 125 | not established | Health Canada, 2025 [3] |
| Adults and adolescents 15 to 17 (EU) | 400 | no figure on the page read | EFSA, 2016 [4] |
| Pregnancy (EU) | 480 | no figure on the page read | EFSA, 2016 [4] |
| Breastfeeding (EU) | 520 | no figure on the page read | EFSA, 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
| Question | What the source found | Strength |
|---|---|---|
| Diet and cognition in adults | A 2018 review notes positive associations between dietary choline intake and cognitive performance, but inconsistent results from choline supplementation studies in adults. [1] | Mixed |
| Diet and dementia | 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] | Promising but limited (observational) |
| Memory supplements | A 2023 review found some current evidence for memory benefit from choline, while noting weak scientific foundations for marketing claims. [5] | Promising but limited |
| Healthy adults taking choline supplements for focus | Proper evidence not found in the sources we read. | Insufficient |
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
When to get help
References
- Wiedeman AM et al. Nutrients 2018. Dietary Choline Intake: Current State of Knowledge Across the Life Cycle. Read 2026-10-23.
- 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.
- Health Canada. Dietary reference intakes tables: reference values for vitamins. Page dated 2025-11-19. Read 2026-10-23.
- European Food Safety Authority (EFSA), Dietary reference values: EFSA publishes advice on choline. Published 17 August 2016. Read 2026-10-23.
- Hersant H et al. CNS Drugs 2023. Over the Counter Supplements for Memory: A Review of Available Evidence. Read 2026-10-23.
- National Institute on Aging, Preventing Alzheimer's Disease: What Do We Know?. Read 2026-10-23.