Folate

vitaminfolate(2-)

Best with a mealTake with food

What is it

Folate is the natural form of vitamin B9 found in leafy greens, legumes, and liver. It is essential for DNA synthesis, cell division, and the formation of red blood cells.

How it works

Folate from food is converted in the gut and liver to 5-methyltetrahydrofolate (5-MTHF), the active circulating form. 5-MTHF provides methyl groups for DNA synthesis, amino acid metabolism, and the conversion of homocysteine to methionine. It is especially critical during rapid cell division such as fetal development and red blood cell production. Dietary folate is less stable than synthetic folic acid — cooking, prolonged storage, and exposure to heat or light reduce content. About 50 percent of food folate is absorbed compared to nearly 100 percent of folic acid taken on an empty stomach.

Evidence for 4 uses

AI-assisted evidence assessment — talk to your doctor before relying on any single supplement.

Prevention of neural tube defects

Grade A

Strong evidence

Adequate folate around conception prevents neural tube defects. Most evidence is with folic acid, but dietary folate contributes to overall status.

Red blood cell production

Grade A

Strong evidence

Folate is required for normal red blood cell maturation. Deficiency causes megaloblastic anemia.

Lowering homocysteine

Grade A

Strong evidence

Folate alongside B12 reduces homocysteine. Cardiovascular event reduction has not been consistently demonstrated.

Cognitive function in older adults

Grade C

Moderate evidence

Observational links between folate status and cognition; supplementation trials are mixed.

Dosage

The RDA is 400 mcg of dietary folate equivalents (DFE) per day for adults. Pregnant women need 600 mcg DFE and breastfeeding women 500 mcg DFE. Most people meeting the RDA through food do not need supplements. The upper limit applies to synthetic folic acid; food folate has no upper limit.

When and how to take it

Food folate is best obtained from minimally cooked leafy greens, fresh legumes, and other plant sources spread throughout the day. Eating folate-rich foods at multiple meals helps maintain steady blood levels. If supplementing, take it consistently at the same time each day.

Food sources

Food	Amount	%DV
Beef liver, 3 oz cooked	215 mcg DFE	54%
Spinach (boiled), 1/2 cup	131 mcg DFE	33%
Lentils (boiled), 1/2 cup	179 mcg DFE	45%
Chickpeas, 1/2 cup	141 mcg DFE	35%
Asparagus, 1/2 cup	134 mcg DFE	34%
Romaine lettuce, 1 cup raw	64 mcg DFE	16%
Avocado, 1/2 cup	59 mcg DFE	15%
Broccoli, 1/2 cup cooked	84 mcg DFE	21%
Orange, 1 medium	29 mcg DFE	7%

Safety

Folate from food is safe at any intake level. There is no documented toxicity from food folate, only from very high-dose supplemental folic acid (which can mask B12 deficiency). Eating folate-rich foods is one of the safest dietary practices.

Who should be cautious

Heavy alcohol users are at high risk of folate deficiency. People with celiac disease or other malabsorption conditions may need higher intake. Pregnant women and those planning pregnancy should ensure adequate folate well before conception, typically through supplements since hitting 600 mcg DFE from food alone is challenging.

Interactions

Adequate folate intake supports the methylation cycle. Methotrexate, anticonvulsants, sulfasalazine, and trimethoprim interfere with folate metabolism. People on these medications often need supplementation under medical guidance. Alcohol significantly impairs folate absorption and metabolism.

Frequently asked questions

Is dietary folate as effective as folic acid?⌄

Folate from food works through the same pathway but is absorbed less efficiently (about 50 percent versus near 100 percent for folic acid). For preventing neural tube defects, folic acid supplementation is recommended because reliably hitting target levels from food alone is difficult.

Can I get enough folate from food?⌄

Most healthy adults can meet the 400 mcg RDA with a varied diet including leafy greens, beans, and fortified grains. Pregnant women generally need supplements to reach 600 mcg reliably.

Does cooking destroy folate?⌄

Yes, significantly. Folate is sensitive to heat, light, and prolonged storage. Eating greens raw or lightly steamed preserves more.

Is folate the same as folic acid?⌄

Folate is the natural form in food. Folic acid is the synthetic form in supplements. Both are converted to active 5-MTHF in the body but at different rates.

Who is most at risk for folate deficiency?⌄

Heavy alcohol users, pregnant women, people with celiac disease or other malabsorption, and those on certain medications like methotrexate.

Track Folate with Pilora

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Disclaimer: These statements have not been evaluated by the FDA. This page is educational, not a substitute for personalized medical advice. Evidence grades are AI-assisted assessments — talk to your doctor before starting any new supplement, especially if you're pregnant, breastfeeding, on medications, or managing a chronic condition.