Choline: What It Does, How Much You Need, and Where to Get It

An essential nutrient most people have barely heard of, and most people don't get enough of.

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By the Ration Editorial Team · Reviewed against primary research · Updated July 14, 2026

Choline is an essential nutrient, meaning your body cannot make enough of it on its own. You have to get most of it from food.

It does not fit neatly into the vitamin or mineral categories. For a long time it was grouped loosely with the B vitamins, and it still shows up on nutrition labels near thiamine and folate.

Your liver produces a small amount of choline, but not nearly enough to meet daily needs. The rest has to come from your diet.

Choline is a building block for cell membranes. Every cell in your body relies on choline-containing compounds like phosphatidylcholine to keep its outer membrane intact.

It is also a precursor to acetylcholine, a neurotransmitter involved in memory, muscle control, and mood regulation.

In the liver, choline helps package and export fat. Without enough choline, fat can accumulate in liver cells, a mechanism seen in animal studies of choline deficiency.

Choline also feeds into one-carbon metabolism, the same biochemical pathway that involves folate and vitamin B12. This pathway helps convert homocysteine into other compounds the body needs.

• Structural component of cell membranes
• Precursor to the neurotransmitter acetylcholine
• Supports fat transport out of the liver
• Feeds into one-carbon metabolism alongside folate and B12
• Contributes to methylation reactions throughout the body

Survey data consistently suggests a large share of adults fall short of the Adequate Intake for choline, particularly in diets low in eggs, meat, and fish.

Vegans and vegetarians tend to have lower intakes, since the richest sources are animal foods. Plant sources like soy and cruciferous vegetables provide some, but generally less per serving.

Pregnant and breastfeeding people have higher requirements, since choline is transferred to the fetus and into breast milk in meaningful amounts. This has made choline intake during pregnancy a specific research focus.

Choline concentrates heavily in a few foods, especially organ meats, eggs, and fish. This makes total intake very dependent on individual eating patterns.

• Egg yolks, among the most concentrated sources
• Beef liver and other organ meats
• Fish such as cod and salmon
• Chicken and beef
• Soybeans and soy products
• Cruciferous vegetables like broccoli and Brussels sprouts
• Wheat germ

Much of the foundational evidence on choline comes from controlled feeding studies where researchers restrict dietary choline and observe what happens.

These depletion studies have shown that low choline intake can lead to liver damage, including fatty liver, and muscle damage in some participants, effects that reversed once choline was reintroduced.

Observational research has also looked at choline intake during pregnancy in relation to fetal brain development, since choline is a precursor for neurotransmitters and is transferred across the placenta in large amounts.

Some studies have explored choline's relationship with cognitive function in aging adults, though results across this body of research are mixed rather than uniformly positive.

Research on choline and cardiovascular risk is more complicated. Gut bacteria convert some dietary choline into a compound called TMAO, which some studies have linked to cardiovascular risk markers, an area still being actively investigated.

Adequate Intake levels are generally set higher for men than for women, and higher still during pregnancy and lactation.

• Adult men, roughly 550 mg per day
• Adult women, roughly 425 mg per day
• Pregnancy, roughly 450 mg per day
• Lactation, roughly 550 mg per day

These figures are general guidelines rather than fixed targets, and actual needs can vary based on genetics. Some people carry gene variants that increase their dietary choline requirement.

Choline from food is generally considered safe with no significant risk of overconsumption.

Supplemental forms include choline bitartrate, CDP-choline (citicoline), and alpha-GPC. These are sold as standalone supplements or included in multivitamins and prenatal formulas.

Very high intakes, well above the Tolerable Upper Intake Level, have been associated with a fishy body odor, low blood pressure, sweating, and gastrointestinal upset.

• Fishy body odor at high doses
• Low blood pressure
• Excessive sweating and salivation
• Gastrointestinal discomfort
• Possible interaction with TMAO metabolism at high intakes

Anyone considering a choline supplement, especially during pregnancy or alongside other medications, should bring it up with a healthcare provider rather than self-dosing based on general guidelines.

• People eating primarily plant based diets with few eggs or animal proteins
• Pregnant or breastfeeding people, given the higher recommended intakes
• Older adults, given choline's role in acetylcholine production
• People with certain genetic variants affecting choline metabolism
• Anyone with limited variety in their diet overall

Choline is essential, underappreciated, and easy to overlook because it rarely gets discussed the way vitamins and minerals do.

Eggs, meat, fish, and to a lesser extent soy and cruciferous vegetables can cover most people's needs without any supplementation.

For those with limited access to these foods, or with higher needs like pregnancy, tracking intake or discussing supplementation with a healthcare provider makes sense.