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Folate: who needs it, when to start, and how much

Folate is a B vitamin that's essential for women planning a pregnancy. It's also used for blood vessel health and processing female hormones. 400 mcg a day is the baseline, and no more than 1,000 mcg. Regular folic acid is enough, but if you have the choice, the active form (MTHF) is a safe pick.

Who it’s for

Women planning a pregnancy, women in their mid-to-late 30s and older, people looking after blood vessel health

Daily dose

400 mcg a day as a baseline, no more than 1,000 mcg (including what's in your multivitamin)

When

If you're planning a pregnancy, take it every day from 1–3 months before conception through week 12

Best form

Regular folic acid is enough; if you can choose, the active form (5-MTHF)

What is folate?

Folate is one of the B vitamins (vitamin B9). It's plentiful in leafy greens like spinach.

It does three main jobs in your body.

  • Making cells: It's needed to make red blood cells and new cells. That's why it matters so much in early pregnancy, when a baby is growing fast.
  • Lowering homocysteine: It turns homocysteine (a substance in the body that can damage blood vessels) into harmless compounds. It works as a team with vitamins B6 and B12.
  • Supplying methyl groups: It hands out methyl groups (small parts the body attaches and removes in chemical reactions), which are used to process female hormones and make neurotransmitters (brain chemicals involved in mood and sleep).

Who needs folate

  • Women planning a pregnancy: This is the clearest reason. A baby's neural tube (which becomes the brain and spinal cord) forms in early pregnancy, and folate is essential at that time.
  • Women in their mid-to-late 30s and older: It's needed for processing female hormones, so it's often recommended as part of a basic routine.
  • People looking after blood vessel health: Along with vitamins B6 and B12, it may help lower homocysteine levels.
  • Women with irregular periods or PCOS (polycystic ovary syndrome): Products that combine it with inositol are popular.
If you're planning a pregnancy, remember the timing. The neural tube starts forming before you even know you're pregnant. So start 1–3 months before pregnancy and keep taking it at least through week 12. Continuing after that is also helpful.

Folate daily dose: how much do you need?

Bottom line: 400 mcg a day is enough. The upper limit is 1,000 mcg.

SituationDaily dose
General health400 mcg
Planning a pregnancy, early pregnancy400–1,000 mcg
You take seizure medicine (anticonvulsants) or have had a baby with a neural tube defectYou need more — always ask your doctor about the dose

Here's a common mistake. Multivitamins, B complexes, and prenatal vitamins already contain folate. If you take extra folate on top, it's easy to go over 1,000 mcg without realizing it.

  1. Add up every 'Folate' or 'Folic Acid' number on the labels of what you take now.
  2. If the total is 400 mcg or more, you don't need to buy folate separately.
  3. If you've been taking a multivitamin with folate since early pregnancy, you don't need extra.

Methylfolate (MTHF) vs folic acid: which should you choose?

Regular folic acid has to go through several steps in your body to become the active form before it can be used. But quite a few people convert it slowly because of a variant in the gene that handles this conversion (MTHFR). That's why active forms that can be used right away were developed.

TypeWhat it's likeBest for
Folic acid (synthetic folate)The most common, also used in medicines. Inexpensive. Stay under the 1,000 mcg upper limit.Pregnancy planning, people who want value
Active folate (5-MTHF, L-methylfolate)Used right away with no conversion. Less worry about leftover folate building up.People concerned about slow conversion, people who need higher doses
Folinic acidAnother active form. Liquid versions make it easy to adjust the dose drop by drop.Children who can't swallow pills
Natural folate (from plants like lemon)'Natural,' but absorbs poorly, so you may need more.Little reason to insist on it

Here's a simple take on where opinions differ.

  • You'll often hear that people with an MTHFR gene variant must take the active form. But the US CDC (Centers for Disease Control and Prevention) says that even with a variant, 400 mcg of regular folic acid is enough. It also says there's no evidence that unconverted leftover folic acid is toxic.
  • So regular folic acid is enough for pregnancy planning. Ads claiming 'active form is a must' are overstated.
  • That said, the active form has almost no side effects and is used right away, so if the price gap is small, choosing the active form is a good option.
If the label says 'Folate (as 5-MTHF)', 'L-Methylfolate', or 'Quatrefolic', it's the active form. If it only says 'Folic Acid', it's regular folic acid.

Folate overdose: side effects and cautions

Folate is a water-soluble vitamin, so it's relatively safe. But avoid taking more than 1,000 mcg of regular folic acid for a long time.

  • It can mask a vitamin B12 deficiency. With a lot of folate, warning signs like anemia may not show up even if you're low in B12. Meanwhile, nerve problems can progress.
  • Some experts also say long-term high doses may have negative effects on nerves or immune cells.
  • If you take seizure medicine (anticonvulsants), you need more folate, but don't increase the dose on your own; decide it with your doctor.
People who take a multivitamin + B complex + folate together are the most likely to go over the limit. Take out all your labels once and add them up.

Supplements that pair well with folate

  • B vitamins (B6, B12): They work as a team with folate to process homocysteine. If your goal is blood vessel health, taking them together as a B complex is efficient.
  • Inositol: For women with irregular periods or PCOS, there are many products that combine it with folate in one pill.
  • Multivitamin: Many already contain folate, so check the amount before taking more separately.

Medications and conditions to watch

  • Check Seizure medicine (anticonvulsants) — Increases how much folate you need — decide the dose with your doctor
  • Note Multivitamin — Combined with the folate in your multivitamin, it's easy to go over the upper limit (1,000 mcg) — add up the labels
  • Note B vitamins (B complex) — B complexes also contain folate, so they overlap — check the total

Combinations

Works well with: B vitamins (B complex), Inositol

How it appears on the label

Match the names on the Supplement Facts panel with the forms of Folate (Folic Acid) explained on this page.

On the labelWhat it isWhat it means
Folic AcidFolic acid (synthetic)Standard folate. The most studied form for pregnancy planning
L-5-MTHF
L-Methylfolate
Methylfolate
Metafolin
Quatrefolic		Methylfolate (active folate)Folate your body can use directly
DFEDFE (dietary folate equivalents)400 mcg folic acid ≈ 680 mcg DFE

Best Folate (Folic Acid) supplements on Amazon, compared

Bottom line

We checked the labels of 22 popular folate (Folic Acid) products on Amazon: 9 recommended, 13 depend on your needs, 0 not recommended.

  • Best overall — Jarrow Formulas Methyl Folate 400 mcg (Extra Strength): 400 mcg ready-to-use active form (5-MTHF) — right on the basic daily amount (Per serving: 1 capsule: active folate 400 mcg (680 mcg DFE))
  • Best value — Life Extension Optimized Folate (L-Methylfolate) 1,700 mcg DFE: 1,000 mcg active L-methylfolate — the 1,700 mcg on the label is DFE (Per serving: 1 tablet: active folate 1,000 mcg (1,700 mcg DFE))
  • Pregnancy, budget — Nature Made Folic Acid 400 mcg (665 mcg DFE): 400 mcg folic acid — exactly the basic amount for trying to conceive (Per serving: 1 tablet: folic acid 400 mcg (665 mcg DFE))
  • With B12 — Life Extension BioActive Folate & Vitamin B12: 400 mcg active folate (680 mcg DFE) with 300 mcg active B12 (methylcobalamin) (Per serving: 1 capsule: active folate 400 mcg (680 mcg DFE) + B12 300 mcg)
  • Chewable — Jarrow Formulas Methyl B-12 1000 mcg & Methyl Folate 400 mcg plus P-5-P (Lemon, Chewable): 400 mcg active folate plus 1,000 mcg methyl B12 and B6 (P5P) — all active forms (Per serving: 1 tablet: active folate 400 mcg (680 mcg DFE) + B12 1,000 mcg + B6 (P5P) 1.5 mg)

We checked the labels of popular Amazon products and rated them by the criteria above. Cost per day is relative — compared with other products of the same supplement. Check Amazon for the current price.

Best overallMethyl Folate 400 mcg (Extra Strength)Jarrow Formulas Best valueOptimized Folate (L-Methylfolate) 1,700 mcg DFELife Extension Pregnancy, budgetFolic Acid 400 mcg (665 mcg DFE)Nature Made With B12BioActive Folate & Vitamin B12Life Extension ChewableMethyl B-12 1000 mcg & Methyl Folate 400 mcg plus P-5-P (Lemon, Chewable)Jarrow Formulas

Recommended 9

RecommendedJarrow Formulas

Methyl Folate 400 mcg (Extra Strength)

Active 5-MTHF (Quatrefolic), capsules · Per serving: 1 capsule: active folate 400 mcg (680 mcg DFE) · Cost per day: high

5-MTHF 400mcg (680mcg DFE)

  • 400 mcg ready-to-use active form (5-MTHF) — right on the basic daily amount
  • Nothing added beyond basic capsule ingredients
  • Moderate cost per day

Trying to conceive, just the basic amount in active form

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RecommendedNOW Foods

Methyl Folate 1,000 mcg

Active 5-MTHF (Quatrefolic), tablets · Per serving: 1 tablet: active folate 1,000 mcg (1,700 mcg DFE) · Cost per day: average

5-MTHF 1,000mcg (1,700mcg DFE)

  • 1,000 mcg active 5-MTHF — fine at this amount since it's the active form
  • Nothing added beyond 3 basic tablet ingredients
  • If your multivitamin has folate, you may already have enough
  • Low cost per day

A generous dose in active form, no multivitamin

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RecommendedLife Extension

Optimized Folate (L-Methylfolate) 1,700 mcg DFE

Active L-methylfolate calcium salt, tablets · Per serving: 1 tablet: active folate 1,000 mcg (1,700 mcg DFE) · Cost per day: average

L-methylfolate 1,000 mcg (1,700 mcg DFE)

  • 1,000 mcg active L-methylfolate — the 1,700 mcg on the label is DFE
  • Folate-only tablet
  • If your multivitamin has folate, you may already have enough
  • Among the lowest cost per day for active folate at this dose

1,000 mcg active folate at a good value

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RecommendedLife Extension

BioActive Folate & Vitamin B12

Active L-methylfolate + methylcobalamin, capsules · Per serving: 1 capsule: active folate 400 mcg (680 mcg DFE) + B12 300 mcg · Cost per day: average

L-methylfolate 680 mcg DFE, methyl B12 300 mcg

  • 400 mcg active folate (680 mcg DFE) with 300 mcg active B12 (methylcobalamin)
  • Just folate and B12 in one capsule
  • Check for overlap with a B complex or multivitamin
  • Low cost per day

Folate and B12 in one capsule, heart and blood vessel health

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RecommendedJarrow Formulas

Methyl B-12 1000 mcg & Methyl Folate 400 mcg plus P-5-P (Lemon, Chewable)

Active 5-MTHF + methyl B12 + P5P, chewable tablets · Per serving: 1 tablet: active folate 400 mcg (680 mcg DFE) + B12 1,000 mcg + B6 (P5P) 1.5 mg · Cost per day: average

5-MTHF 680 mcg DFE, methyl B12 1,000 mcg, P5P 1.5 mg

  • 400 mcg active folate plus 1,000 mcg methyl B12 and B6 (P5P) — all active forms
  • Lemon chewable sweetened with xylitol
  • Check for overlap with a B complex or multivitamin
  • Low cost per day

Trouble swallowing pills, folate and B12 together

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RecommendedNature Made

Folic Acid 400 mcg (665 mcg DFE)

Folic acid, tablets · Per serving: 1 tablet: folic acid 400 mcg (665 mcg DFE) · Cost per day: low

Folic acid 400 mcg (665 mcg DFE)

  • 400 mcg folic acid — exactly the basic amount for trying to conceive
  • The most studied form, enough when trying to conceive
  • Nothing added beyond basic tablet ingredients (including 70 mg calcium)
  • Very low cost per day

Trying to conceive on a budget. If trying to conceive, add up the folate in your multivitamin or prenatal too.

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Recommended21st Century

Folic Acid 400 mcg

Folic acid, tablets · Per serving: 1 tablet: folic acid 400 mcg (667 mcg DFE) · Cost per day: low

Folic acid 400 mcg (667 mcg DFE), calcium 100 mg

  • 400 mcg folic acid — exactly the basic amount for trying to conceive
  • The most studied form, enough when trying to conceive
  • Basic tablet ingredients include 100 mg calcium
  • Very low cost per day

Trying to conceive on a budget. If trying to conceive, add up the folate in your multivitamin or prenatal too.

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RecommendedNature's Bounty

Folic Acid 800 mcg

Folic acid, tablets · Per serving: 1 tablet: folic acid 800 mcg (1,333 mcg DFE) · Cost per day: low

Folic acid 800 mcg (1,333 mcg DFE)

  • 800 mcg folic acid — within the range for trying to conceive (400–1,000 mcg)
  • Easy to go over the 1,000 mcg limit when added to a multivitamin
  • Nothing added beyond basic tablet ingredients
  • Very low cost per day

Trying to conceive and want a generous dose without a multivitamin

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RecommendedNOW Foods

Folic Acid 800 mcg with Vitamin B-12 25 mcg

Folic acid + cyanocobalamin, tablets · Per serving: 1 tablet: folic acid 800 mcg (1,360 mcg DFE) + B12 25 mcg · Cost per day: low

Folic acid 800 mcg (1,360 mcg DFE), B12 25 mcg

  • 800 mcg folic acid with a little B12 (25 mcg, standard form)
  • Easy to go over the 1,000 mcg limit when added to a multivitamin
  • Nothing added beyond basic tablet ingredients; very low cost per day

Trying to conceive and want a generous dose without a multivitamin

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Depends on your needs 13

DependsThorne

5-MTHF 1 mg

Active 5-MTHF (Extrafolate-S), capsules · Per serving: 1 capsule: active folate 1 mg (1.7 mg DFE); label 1–3 capsules a day · Cost per day: high

5-MTHF 1,000mcg (1,700mcg DFE)

  • 1,000 mcg active 5-MTHF, low-additive capsule
  • Label says 1–3 a day, but 1 is enough for general use
  • Over 3 times the cost per day of other 1,000 mcg active folate

Fans of this brand (compare prices with same-dose products first)

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DependsDoctor's Best

Fully Active Folate 400 with Quatrefolic

Active 5-MTHF (Quatrefolic), capsules · Per serving: 1 capsule: folate 400 mcg DFE (active form) · Cost per day: average

Folate 400 mcg DFE, vitamin C 40 mg

  • Active Quatrefolic, but the 400 mcg on the label is DFE — about 240 mcg as folic acid
  • Below the guide for trying to conceive (about 680 mcg DFE)
  • Includes 40 mg vitamin C; low cost per day

A light dose for general wellness (if trying to conceive, choose a higher dose)

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DependsPure Encapsulations

B12 Folate

Active 5-MTHF (Metafolin) + methylcobalamin, capsules · Per serving: 1 capsule: active folate 800 mcg (1,333 mcg DFE) + B12 800 mcg; label 1–2 capsules a day · Cost per day: high

5-MTHF 800 mcg (1,333 mcg DFE), methyl B12 800 mcg

  • 800 mcg active folate and 800 mcg methyl B12 — good forms and amounts
  • Almost nothing added beyond plant fiber and the capsule
  • Label max (2 a day) gives 1,600 mcg folate — 1 capsule is enough
  • Over 3 times the cost per day of similar folate + B12 products

Wanting minimal additives (compare prices first)

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DependsNutricost

Folic Acid 1,000 mcg

Folic acid, gelatin capsules · Per serving: 1 capsule: folic acid 1,000 mcg (1,700 mcg DFE) · Cost per day: low

Folic acid 1,000 mcg (1,700 mcg DFE)

  • 1,000 mcg folic acid — the same as the upper limit
  • Taken with a multivitamin or B complex, you go over the limit right away
  • Nothing added beyond rice flour and a gelatin capsule
  • Low cost per day

No multivitamin and told to take 1,000 mcg

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DependsVitamatic

Folic Acid 1000 mcg

Folic acid, tablets · Per serving: 1 tablet: folic acid 1,000 mcg (1,667 mcg DFE) · Cost per day: low

Folic acid 1,000 mcg (1,667 mcg DFE)

  • 1,000 mcg folic acid — the same as the upper limit
  • Taken with a multivitamin or B complex, you go over the limit right away
  • Nothing added beyond basic tablet ingredients
  • Low cost per day

No multivitamin and told to take 1,000 mcg

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DependsBest Naturals

Folic Acid 1000 mcg

Folic acid, tablets · Per serving: 1 tablet: folic acid 1,000 mcg (1,667 mcg DFE) · Cost per day: low

Folic acid 1,000 mcg (1,667 mcg DFE), calcium 50 mg

  • 1,000 mcg folic acid — the same as the upper limit
  • Taken with a multivitamin or B complex, you go over the limit right away
  • Nothing added beyond basic tablet ingredients (including 50 mg calcium)
  • Low cost per day

No multivitamin and told to take 1,000 mcg

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DependsMethylPro

L-Methylfolate 15 mg

Active L-methylfolate, capsules · Per serving: 1 capsule: L-methylfolate 15 mg (25 mg DFE) + glycine 250 mg · Cost per day: high

L-methylfolate 15,000 mcg (25,000 mcg DFE), glycine 250 mg

  • 15 mg (15,000 mcg) per capsule — a prescription-level dose, over 15 times everyday amounts (400–1,000 mcg)
  • Just 250 mg glycine and a cellulose capsule otherwise
  • Very high cost per day

Only if your doctor recommended high-dose methylfolate

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DependsTriquetra Health

L Methyl Folate 15mg + Methyl B12 Cofactor

Active 5-MTHF calcium salt + methylcobalamin, capsules (per seller) · Per serving: 1 capsule: L-methylfolate 15 mg + methyl B12 (per seller) · Cost per day: high

Per seller: L-methylfolate 15 mg + methyl B12 (check the label for B12 amount)

  • Seller lists 15 mg (15,000 mcg) per capsule — a prescription-level dose, over 15 times everyday amounts
  • Says it includes methyl B12, but check the label for the amount
  • Couldn't find the same product on the NIH label database (DSLD), so amounts aren't confirmed

Only if your doctor recommended high-dose methylfolate (check the label yourself)

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DependsCarlyle

L Methylfolate 15mg

Active L-methylfolate, capsules (per seller) · Per serving: 1 capsule: L-methylfolate 15 mg (25,000 mcg DFE, per seller) · Cost per day: high

Per seller: L-methylfolate 15 mg (25,000 mcg DFE)

  • Seller lists 15 mg (15,000 mcg) per capsule — a prescription-level dose, over 15 times everyday amounts
  • Couldn't find the same product on the NIH label database (DSLD), so amounts aren't confirmed
  • Low cost per day among 15 mg products

Only if your doctor recommended high-dose methylfolate (check the label yourself)

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DependsTriquetra Health

L Methylfolate 1000 mcg + Methyl B12 Cofactor

Active 5-MTHF calcium salt + methylcobalamin, capsules (per seller) · Per serving: 1 capsule: L-methylfolate 1,000 mcg + methyl B12 (per seller) · Cost per day: high

Per seller: L-methylfolate 1,000 mcg + methyl B12 (check the label for B12 amount)

  • Seller lists 1,000 mcg active folate + methyl B12 — check the label for the B12 amount
  • Couldn't find the same product on the NIH label database (DSLD), so amounts aren't confirmed
  • Higher cost per day than similar folate + B12 products

Folate and B12 in one capsule (check the label yourself)

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DependsInnervis Nutrition

L-Methylfolate 1000mcg (1700 mcg DFE)

Active L-5-methylfolate, capsules (per seller) · Per serving: 1 capsule: active folate 1,000 mcg (1,700 mcg DFE, per seller) · Cost per day: average

Per seller: L-methylfolate 1,000 mcg (1,700 mcg DFE)

  • Seller lists 1,000 mcg active L-5-methylfolate — fine at this amount since it's the active form
  • Couldn't find the same product on the NIH label database (DSLD), so amounts aren't confirmed
  • Low cost per day

Looking for 1,000 mcg active folate (check the label yourself)

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DependsNature's Bounty

Folic Acid 1 mg

Folic acid, tablets (per seller) · Per serving: 1 tablet: folic acid 1 mg (1,000 mcg, per seller) · Cost per day: average

Per seller: folic acid 1,000 mcg

  • Seller lists 1,000 mcg folic acid per tablet — the same as the upper limit
  • Couldn't find the same product on the NIH label database (DSLD), so amounts aren't confirmed
  • Over twice the cost per day of other 1,000 mcg folic acid

No multivitamin and told to take 1,000 mcg (check the label yourself)

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Depends365 by Whole Foods Market

Folic Acid 800 mcg

Folic acid, tablets (per seller) · Per serving: 1 tablet: folic acid 800 mcg (per seller) · Cost per day: low

Per seller: folic acid 800 mcg

  • Seller lists 800 mcg folic acid per tablet — within the range for trying to conceive
  • Couldn't find the same product on the NIH label database (DSLD), so amounts aren't confirmed
  • Low cost per day

Trying to conceive without a multivitamin (check the label yourself)

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Want it in one pill with others? Compare prenatal vitamins →

Frequently asked questions

When should I start taking folate?

If you're planning a pregnancy, start 1–3 months before. The neural tube forms before you even know you're pregnant. It's best to take it every day at least through week 12.

What's the recommended daily amount of folate?

400 mcg a day is the baseline. If you're planning a pregnancy, take 400–1,000 mcg. With regular folic acid, it's best not to go over 1,000 mcg.

Do I really need active folate (methylfolate)?

Not necessarily. The US CDC's position is that even with a gene variant, 400 mcg of regular folic acid is enough. But the active form is used right away and has almost no side effects, so it's worth choosing if the price is similar.

If I take a multivitamin, do I still need folate?

If your multivitamin has 400 mcg or more of folate, you don't need extra. Check the Folate number on the label first.

Are there side effects from taking too much folate?

Taking more than 1,000 mcg of regular folic acid for a long time can mask a vitamin B12 deficiency. Check the total so it doesn't overlap with your multivitamin or B complex.

Can men take folate?

Yes. Folate works with B6 and B12 to lower homocysteine, so it may also help people looking after blood vessel health. Usually a B complex or multivitamin covers it.

Related concerns

Pregnancy & prenatalHigh blood pressurePCOSMenopause symptoms

Last updated 2026-10-12