Betaine in Plant-Based Foods

The richest plant-based sources of betaine are wheat bran (~1,340 mg/100g), wheat germ (~1,240 mg/100g), spinach (~600 mg/100g), quinoa (~390 mg/100g), amaranth (~370 mg/100g), and beets (~128–297 mg/100g). Wheat-based brans and germs are far richer in betaine than beets — even though beets are the food most commonly associated with the compound because betaine was first isolated from sugar beet molasses.

Betaine (trimethylglycine, or TMG) has several well-documented benefits. It lowers elevated homocysteine — a cardiovascular risk marker — by donating a methyl group directly to homocysteine, converting it to the benign amino acid methionine. It supports liver fat metabolism and helps protect against non-alcoholic fatty liver disease (NAFLD). Research also shows it may modestly improve athletic strength and body composition at supplement doses (2,500 mg/day). And because betaine can spare choline requirements in the methylation cycle, it is doubly useful for plant-based eaters who need to be mindful of choline intake.

Among plant foods, the highest TMG (betaine) sources are wheat bran, wheat germ, oat bran, spinach, quinoa, amaranth, beetroot, chard, and rye bread. Wheat germ and wheat bran top the list at over 1,000 mg/100g — several times higher than beets (~128–297 mg/100g), which are often highlighted but are not actually the richest source. Use the ranking table above to browse and filter by food group.

There is no official Recommended Dietary Allowance (RDA) for betaine. Typical intake on a Western diet runs 100–300 mg/day. Studies on cardiovascular benefits and athletic performance have used supplement doses of 1,000–2,500 mg/day. A whole-food plant-based diet rich in spinach, quinoa, wheat germ, oat bran, and beets can deliver 500–1,000 mg/day naturally from food. There is no established tolerable upper intake level for dietary betaine from food sources.

Yes — and this is one of betaine's best-established roles. Betaine donates a methyl group to homocysteine, converting it to methionine via the enzyme betaine-homocysteine methyltransferase (BHMT). This reaction works independently of folate and vitamin B12, making betaine a useful additional lever for managing homocysteine — particularly for people with MTHFR gene variants who have reduced capacity to remethylate homocysteine via the folate pathway. Clinical trials show betaine supplementation of 1,500–6,000 mg/day can reduce plasma homocysteine by 10–20%. Elevated homocysteine is associated with increased risk of cardiovascular disease, stroke, and cognitive decline.

Yes. Betaine plays a key role in hepatic lipid metabolism by promoting the synthesis of phosphatidylcholine, a component of the lipoproteins (VLDL) that export fat from the liver. Studies show betaine reduces liver triglyceride accumulation, improves insulin sensitivity, and reduces inflammation associated with non-alcoholic fatty liver disease (NAFLD). Both animal and human studies demonstrate that betaine also protects against alcohol-induced fatty liver and steatosis. This liver-protective role is one of the most robust findings in betaine research.

Research suggests betaine modestly improves strength, power output, and body composition when taken as a supplement (typically 2,500 mg/day). Several randomised controlled trials have found improvements in bench press volume, squat performance, and anaerobic peak power (measured by Wingate tests). The proposed mechanisms include enhanced creatine synthesis (betaine donates methyl groups required for creatine production) and cellular hydration through osmolytic effects. While most studies use isolated supplements, a plant-based diet high in wheat germ, oat bran, and spinach delivers substantial dietary betaine that may contribute similar benefits over time.

They are closely related methyl donors. Choline is an essential nutrient used to build cell membranes (as phosphatidylcholine) and produce the neurotransmitter acetylcholine. When choline is oxidised in the liver and kidneys, it becomes betaine — so betaine is actually a metabolite of choline. Betaine then acts as an alternative methyl donor in the same methylation cycle. A practical consequence: high dietary betaine intake reduces the body's demand for choline, making betaine-rich plant foods like spinach, quinoa, and wheat germ particularly valuable. See also the choline ranking tool to track both nutrients together.

These are two different supplements with completely different purposes. Betaine HCl (betaine hydrochloride) is used to increase stomach acidity and support protein digestion — it is not the same compound and should not be used interchangeably. Betaine TMG (trimethylglycine or betaine anhydrous) is the naturally occurring form found in wheat germ, spinach, and beets; it functions as a methyl donor and is used for homocysteine management, liver support, and methylation. When choosing a supplement for cardiovascular or methylation support, specifically look for "betaine anhydrous" or "TMG" — not betaine HCl.

No. Beetroot contains betaine but is not synonymous with it. Betaine was first isolated from sugar beet molasses in the 19th century, which is how the compound got its name. However, beetroot is not the richest source — wheat bran (~1,340 mg/100g) and wheat germ (~1,240 mg/100g) contain several times more betaine than whole beets (~128–297 mg/100g). Beetroot supplements marketed for athletic performance typically target their nitrate content, which boosts nitric oxide production via a different pathway entirely. Betaine and nitrates are distinct compounds with distinct mechanisms.

Betaine is water-soluble, so boiling can cause meaningful losses as it leaches into cooking water. Studies on spinach show betaine losses of 30–50% when boiled compared to much smaller losses when steamed or stir-fried. Grains like wheat germ and oat bran retain betaine well during baking. Fermentation (as in sourdough bread) does not significantly degrade betaine. For maximum retention, prefer steaming or stir-frying over boiling, and if you do boil betaine-rich vegetables, consider using the cooking liquid in soups or sauces to recover the leached nutrients.

Yes — plant-based diets are among the best dietary patterns for betaine intake. Unlike choline (where plant-based eaters sometimes need to be deliberate), betaine is abundant in whole grains, leafy greens, and pseudocereals that are staples of a whole-food plant-based diet. Regular consumption of oatmeal, whole-wheat bread, quinoa, spinach, beets, and chard easily delivers 400–800 mg of betaine per day without any supplementation. This makes plant-based eaters well-positioned to benefit from betaine's cardiovascular and methylation-supporting roles.