Choline in Plant-Based Foods

Yes. Soybeans, lentils, quinoa, flaxseeds, nuts, and whole grains all provide meaningful choline. Betaine (from beets and spinach) also helps spare choline needs through metabolic conversion. A varied plant-based diet covering these food groups can meet the 425–550 mg/day Adequate Intake.

Betaine is a choline metabolite formed when choline is oxidised. It is found in high concentrations in beets, spinach, and quinoa. While betaine is not identical to choline, it can fulfil several of choline's metabolic roles, making betaine-rich foods particularly valuable for plant-based eaters.

The National Academies of Medicine set the Adequate Intake (AI) at 550 mg/day for adult men and 425 mg/day for adult women (increasing to 450 mg during pregnancy and 550 mg while breastfeeding).

Choline is essential for cell membrane integrity (as phosphatidylcholine), neurotransmitter synthesis (acetylcholine), liver fat metabolism, and fetal brain development. It is often grouped with the B vitamins despite not being officially classified as one.

Choline is an essential nutrient but is not officially classified as a vitamin. It shares characteristics with B vitamins — it is water-soluble, essential for metabolism, and must be obtained largely from diet — but because the body can synthesise small amounts of choline in the liver (via the PEMT enzyme), it falls into a separate category. The Institute of Medicine established an Adequate Intake (AI) for choline in 1998, recognising it as essential, though no RDA (Recommended Dietary Allowance) has been set due to insufficient data to define an average requirement.

Choline deficiency primarily affects the liver — the most well-documented effect is non-alcoholic fatty liver disease (NAFLD), caused by impaired fat export from liver cells when phosphatidylcholine production is insufficient. Other symptoms can include muscle damage (elevated creatine kinase), cognitive difficulties, and elevated homocysteine. Overt deficiency is rare in people eating a varied diet, but subclinical insufficiency is common in groups with increased needs: pregnant women, infants, and people on very restricted diets. Genetic variants in the PEMT gene also affect individual choline requirements.

It depends on the individual, the diet, and life stage — but the TMAO concern that often comes up around choline supplementation is far less relevant for plant-based eaters than mainstream coverage suggests. A well-planned whole-food plant-based diet including generous amounts of tofu, edamame, lentils, quinoa, and cruciferous vegetables can meet the AI for most non-pregnant adults. Pregnant individuals (needs rise to 450 mg/day) should be most attentive to intake. Research from Dr. Michael Greger at NutritionFacts.org and from PCRM (Dr. Neal Barnard's organisation) shows that people eating plant-based diets are substantially protected from the cardiovascular harms associated with choline from animal products — see the question on TMAO below for the full explanation. If in doubt about meeting daily targets from food alone, a modest supplement of 250–400 mg/day is well within the tolerable upper intake level of 3,500 mg/day. For most plant-based eaters eating a varied diet rich in legumes and soy foods, supplementation is typically unnecessary.

No — and this is one of the most important distinctions in plant-based nutrition. TMAO (trimethylamine N-oxide) is a compound produced when gut bacteria convert dietary choline and carnitine into TMA, which the liver then oxidises to TMAO. High TMAO levels are associated with increased risk of heart attack, stroke, and cardiovascular death. The crucial difference is that people eating plant-based diets have a different gut microbiome — one that does not harbour the bacteria that efficiently convert choline into TMA in the first place. Dr. Michael Greger at NutritionFacts.org cites research showing that if you give a vegan a steak — which contains both choline and carnitine — TMAO doesn't even rise. The bacteria needed to make the conversion simply aren't present in a plant-fed gut. Even choline-rich plant foods like Brussels sprouts appear to actively lower TMAO levels by inhibiting FMO3 — the liver enzyme responsible for the final TMA-to-TMAO conversion step — through compounds produced as Brussels sprouts pass through the digestive tract. PCRM (the Physicians Committee for Responsible Medicine, founded by Dr. Neal Barnard) confirms that participants following vegan or vegetarian diets are specifically protected against the TMAO-related cardiovascular harm associated with choline in animal products. This means that choline from plant foods — tofu, edamame, lentils, broccoli — is not the same metabolic risk as choline from eggs or meat, and should not be treated as such.

Choline is an essential nutrient involved in liver function, brain development, nerve signalling, and the production of the neurotransmitter acetylcholine. It is also the precursor to betaine, which is critical for methylation reactions. Whole plant foods are well-represented across the choline spectrum — soy products, shiitake mushrooms, quinoa, Brussels sprouts, and broccoli are among the richest dietary sources, and a varied whole-food plant-based diet covers this nutrient comfortably.

Among plant foods, soy products consistently rank highest — firm tofu, edamame, and soy milk all provide meaningful amounts. Shiitake mushrooms are an exceptional plant source at around 116 mg/100g dried. Other reliable plant sources include Brussels sprouts, broccoli, quinoa, almonds, peanuts, and wheat germ. Kidney and black beans also contribute. A varied whole-food plant-based diet centred on these food groups provides reliable, sufficient choline intake without any need for supplementation for most adults.

Betaine is a metabolite of choline — the body converts choline to betaine through oxidation in the liver and kidneys. Betaine is also directly available from foods, particularly beets, spinach, quinoa, and wheat products. Betaine participates in the same methylation pathway as choline and can partially substitute for it as a methyl donor in homocysteine metabolism. High betaine intake can partially offset lower choline intake, which is important for plant-based eaters to understand.

The Adequate Intake (AI) for choline is 550 mg/day for adult men and 425 mg/day for adult women, set by the National Academies of Medicine. Needs increase during pregnancy (450 mg/day) and lactation (550 mg/day). Many people fall short of these targets regardless of diet. The practical strategy for plant-based eaters is straightforward: regular inclusion of soy products, shiitake mushrooms, and cruciferous vegetables alongside betaine-rich foods like beets and quinoa reliably covers daily needs across all life stages except pregnancy, where closer attention is warranted.