Vitamins
Folate (folic acid, B9)
A B vitamin (B9) from leafy greens and beans – folic acid in pills. Your body needs it to make new cells and blood, especially in early pregnancy.
131 products from US online stores, sorted by what 400 µg of folate costs – not by the price per pack.
0.81¢Lowest cost
per 400 µg folate
- Prices checked Nov 1, 2026, US
- No paid placements
What does 400 µg mean?
- folate per serving in most of the products we checked
- 667–8,500 µgfolate per serving in most of the products we checked
- 400 µg is a fixed amount to compare by: half of the 131 products we checked have up to 1,334 µg per serving, the other half more.
- 400 µg is the amount recommended a day for adults (NIH (opens in a new tab)).
We compare by 400 µg only so products line up – it’s not a recommendation. Not medical advice.
Where products miss quality points
How the 131 products score
- Very good 90+: 8
- Good 75+: 123
- Fair 60+: 0
- Low under 60: 0
- have no seal from an independent testing program
- 94%have no seal from an independent testing program10 of 30 testing points for GMP, 15 for the 10 whose label says “third-party tested”
The full 30 testing points need an independent test. Every supplement sold in the US is made under the FDA’s GMP rules – the maker checks its own products, which gives 10 points. A seal from a testing program like NSF, USP or Informed Choice means a lab outside the company checks that what’s inside matches the label. Most brands don’t take part. That doesn’t make a product bad – without a seal, a clean product still gets up to 80.
We find seals on the label and in NSF’s public lists. USP and Informed Choice don’t let us search their lists automatically, so a seal that’s only in their lists can be missing. How the score works
Pack size
Compare packs of a similar size.
All sizes in one list can affect the results – big packs usually cost less per 400 µg. Pick a size above to compare packs that are alike.
106 of 131 products · cheapest per 400 µg folate first
25 products are hidden
They have more than 1,000 µg folic acid or methylfolate (1,700 µg DFE) in one serving – more than the official upper limit a day for adults.
- Rank 1
Nature's Bounty
Folic Acid, 800 mcg
Folic acid · Tablets
80Good qualityMade in USA0.81¢per 400 µg
Lowest
- Pack
- $6.75250 tablets
- Folate per serving
- 1,333 µgin 1 tablet
- Pack lasts
- 250 daysat 1 tablet (1,333 µg) a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 2
Micro Ingredients
Folic Acid, 1,000 mcg
Folic acid · Softgels
80Good qualityCountry not stated0.82¢per 400 µg
1% more
- Pack
- $16.99500 softgels
- Folate per serving
- 1,667 µgin 1 softgel
- Pack lasts
- 500 daysat 1 softgel (1,667 µg) a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 3
Vitamatic
Folic Acid 800 mcg Supplement
Folic acid · Tablets
80Good qualityMade in USA0.84¢per 400 µg
4% more
- Pack
- $13.99500 tablets
- Folate per serving
- 1,330 µgin 1 tablet
- Pack lasts
- 500 daysat 1 tablet (1,330 µg) a day
vitamaticusa.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 4
Source Naturals
Folic Acid, 800 mcg
Folic acid · Tablets
80Good qualityCountry not stated0.84¢per 400 µg
4% more
- Pack
- $14.34500 tablets
- Folate per serving
- 1,360 µgin 1 tablet
- Pack lasts
- 500 daysat 1 tablet (1,360 µg) a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 5
Swanson Vitamins
Folic Acid, 800 mcg
Folic acid · Capsules
80Good qualityCountry not stated0.86¢per 400 µg
6% more
- Pack
- $7.29250 capsules
- Folate per serving
- 1,360 µgin 1 capsule
- Pack lasts
- 250 daysat 1 capsule (1,360 µg) a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 6
Swanson Vitamins
Folic Acid
Folic acid · Capsules
80Good qualityCountry not stated0.87¢per 400 µg
8% more
- Pack
- $7.29250 capsules
- Folate per serving
- 1,335 µgin 1 capsule
- Pack lasts
- 250 daysat 1 capsule (1,335 µg) a day
swansonvitamins.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 7
Amazing Nutrition
Amazing Formulas Folic Acid - 1000 Mcg
Folic acid · Tablets
85Good qualityCountry not stated0.88¢per 400 µg
9% more
- Pack
- $8.99240 tablets
- Folate per serving
- 1,700 µgin 1 tablet
- Pack lasts
- 240 daysat 1 tablet (1,700 µg) a day
amazingnutrition.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 8
Vitamatic
Folic Acid, 800 mcg
Folic acid · Tablets
80Good qualityCountry not stated0.88¢per 400 µg
9% more
- Pack
- $14.69500 tablets
- Folate per serving
- 1,330 µgin 1 tablet
- Pack lasts
- 500 daysat 1 tablet (1,330 µg) a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 9
Sundance Vitamins
Folic Acid 800mcg
Folic acid · Tablets
80Good qualityCountry not stated0.91¢per 400 µg
12% more
- Pack
- $7.59250 tablets
- Folate per serving
- 1,333 µgin 1 tablet
- Pack lasts
- 250 daysat 1 tablet (1,333 µg) a day
sundancevitamins.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 10
21st Century
Folic Acid, 800 mcg
Folic acid · Tablets
80Good qualityCountry not stated0.91¢per 400 µg
13% more
- Pack
- $5.49180 tablets
- Folate per serving
- 1,334 µgin 1 tablet
- Pack lasts
- 180 daysat 1 tablet (1,334 µg) a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 11
21st Century
Folic Acid 800 mcg
Folic acid · Tablets
80Good qualityCountry not stated0.91¢per 400 µg
13% more
- Pack
- $5.49180 tablets
- Folate per serving
- 1,334 µgin 1 tablet
- Pack lasts
- 180 daysat 1 tablet (1,334 µg) a day
21stcenturyvitamins.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 12
Vitacost
Everyday Essentials, Folic Acid, 800 mcg
Folic acid · Tablets
80Good qualityCountry not stated0.94¢per 400 µg
16% more
- Pack
- $7.85250 tablets
- Folate per serving
- 1,333 µgin 1 tablet
- Pack lasts
- 250 daysat 1 tablet (1,333 µg) a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 13
Nature's Truth
Folic Acid, 800 mcg
Folic acid · Tablets
80Good qualityCountry not stated0.95¢per 400 µg
17% more
- Pack
- $7.88250 tablets
- Folate per serving
- 1,333 µgin 1 tablet
- Pack lasts
- 250 daysat 1 tablet (1,333 µg) a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 14
Micro Ingredients
Premium Folic Acid Softgels
Folic acid · Softgels
80Good qualityCountry not stated0.96¢per 400 µg
18% more
- Pack
- $19.95500 softgels
- Folate per serving
- 1,667 µgin 1 softgel
- Pack lasts
- 500 daysat 1 softgel (1,667 µg) a day
microingredients.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 15
Carlson
Folic Acid, 800 mcg
Folic acid · Tablets
80Good qualityCountry not stated1¢per 400 µg
23% more
- Pack
- $33.921,000 tablets
- Folate per serving
- 1,360 µgin 1 tablet
- Pack lasts
- 1,000 daysat 1 tablet (1,360 µg) a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 16
Vitamatic
Folic Acid
Folic acid · Tablets
80Good qualityMade in USA1¢per 400 µg
23% more
- Pack
- $9.99240 tablets
- Folate per serving
- 1,667 µgin 1 tablet
- Pack lasts
- 240 daysat 1 tablet (1,667 µg) a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 17
Vitamatic
Folic Acid 1 mg Supplement
Folic acid · Tablets
80Good qualityMade in USA1¢per 400 µg
23% more
- Pack
- $9.99240 tablets
- Folate per serving
- 1,667 µgin 1 tablet
- Pack lasts
- 240 daysat 1 tablet (1,667 µg) a day
vitamaticusa.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 18
Nature's Truth
Folic Acid 800 mcg
Folic acid · Tablets
80Good qualityCountry not stated1.1¢per 400 µg
33% more
- Pack
- $8.99250 tablets
- Folate per serving
- 1,333 µgin 1 tablet
- Pack lasts
- 250 daysat 1 tablet (1,333 µg) a day
naturestruth.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 19
Amazing Nutrition
Amazing Formulas Folic Acid - 800 Mcg
Folic acid · Capsules
80Good qualityMade in USA1.1¢per 400 µg
36% more
- Pack
- $8.99240 capsules
- Folate per serving
- 1,360 µgin 1 capsule
- Pack lasts
- 240 daysat 1 capsule (1,360 µg) a day
amazingnutrition.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 20
Carlson
Folic Acid 800 mcg
Folic acid · Tablets
80Good qualityCountry not stated1.2¢per 400 µg
45% more
- Pack
- $39.901,000 tablets
- Folate per serving
- 1,360 µgin 1 tablet
- Pack lasts
- 1,000 daysat 1 tablet (1,360 µg) a day
carlsonlabs.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 21
Carlson
Folic Acid, 800 mcg
Folic acid · Tablets
80Good qualityCountry not stated1.2¢per 400 µg
53% more
- Pack
- $12.67300 tablets
- Folate per serving
- 1,360 µgin 1 tablet
- Pack lasts
- 300 daysat 1 tablet (1,360 µg) a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 22
Best Naturals
Folic Acid 800 mcg
Folic acid · Capsules
80Good qualityMade in USA1.2¢per 400 µg
54% more
- Pack
- $9.99240 capsules
- Folate per serving
- 1,333.3 µgin 1 capsule
- Pack lasts
- 240 daysat 1 capsule (1,333.3 µg) a day
shopbestnaturals.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 23
Vitamatic
Folic Acid, 400 mcg
Folic acid · Tablets
80Good qualityCountry not stated1.3¢per 400 µg
56% more
- Pack
- $10.49500 tablets
- Folate per serving
- 665 µgin 1 tablet
- Pack lasts
- 500 daysat 1 tablet (665 µg) a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 24
Nutricost
Folic Acid, 1,000 mcg
Folic acid · Capsules
85Good qualityMade in USA1.3¢per 400 µg
57% more
- Pack
- $12.95240 capsules
- Folate per serving
- 1,700 µgin 1 capsule
- Pack lasts
- 240 daysat 1 capsule (1,700 µg) a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 25
21st Century
Folic Acid, 400 mcg
Folic acid · Tablets
80Good qualityCountry not stated1.3¢per 400 µg
63% more
- Pack
- $5.49250 tablets
- Folate per serving
- 667 µgin 1 tablet
- Pack lasts
- 250 daysat 1 tablet (667 µg) a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 26
21st Century
Folic Acid 400 mcg
Folic acid · Tablets
80Good qualityCountry not stated1.3¢per 400 µg
63% more
- Pack
- $5.49250 tablets
- Folate per serving
- 667 µgin 1 tablet
- Pack lasts
- 250 daysat 1 tablet (667 µg) a day
21stcenturyvitamins.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 27
Mason Natural
Folic Acid, 800 mcg
Folic acid · Tablets
80Good qualityCountry not stated1.3¢per 400 µg
66% more
- Pack
- $4.49100 tablets
- Folate per serving
- 1,333 µgin 1 tablet
- Pack lasts
- 100 daysat 1 tablet (1,333 µg) a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 28
Solgar
Folate, 1,333 mcg DFE
Folate · Tablets
80Good qualityCountry not stated1.4¢per 400 µg
72% more
- Pack
- $11.58250 tablets
- Folate per serving
- 1,333 µgin 1 tablet
- Pack lasts
- 250 daysat 1 tablet (1,333 µg) a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 29
Carlson
Folic Acid 800 mcg
Folic acid · Tablets
80Good qualityCountry not stated1.5¢per 400 µg
80% more
- Pack
- $14.90300 tablets
- Folate per serving
- 1,360 µgin 1 tablet
- Pack lasts
- 300 daysat 1 tablet (1,360 µg) a day
carlsonlabs.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 30
Nutricost
Folic Acid (Vitamin B9) Capsules
Folic acid · Capsules
80Good qualityCountry not stated1.5¢per 400 µg
81% more
- Pack
- $14.97240 capsules
- Folate per serving
- 1,700 µgin 1 capsule
- Pack lasts
- 240 daysat 1 capsule (1,700 µg) a day
nutricost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 31
Nature Made
Folic Acid
Folic acid · Tablets
100Very good qualityCountry not stated1.5¢per 400 µg
87% more
- Pack
- $6.31250 tablets
- Folate per serving
- 665 µgin 1 tablet
- Pack lasts
- 250 daysat 1 tablet (665 µg) a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 32
Vitamatic
Folic Acid 400 mcg Supplement
Folic acid · Tablets
80Good qualityMade in USA1.6¢per 400 µg
93% more
- Pack
- $12.99500 tablets
- Folate per serving
- 665 µgin 1 tablet
- Pack lasts
- 500 daysat 1 tablet (665 µg) a day
vitamaticusa.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 33
BulkSupplements
Folic Acid (Vitamin B9) Softgels
Folic acid · Softgels
80Good qualityCountry not stated1.6¢per 400 µg
99% more
- Pack
- $24.97365 softgels
- Folate per serving
- 1,700 µgin 1 softgel
- Pack lasts
- 365 daysat 1 softgel (1,700 µg) a day
bulksupplements.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 34
Amazing Nutrition
Amazing Formulas Folic Acid - 400 Mcg
Folic acid · Tablets
85Good qualityCountry not stated1.6¢per 400 µg
103% more
- Pack
- $13.99500 tablets
- Folate per serving
- 680 µgin 1 tablet
- Pack lasts
- 500 daysat 1 tablet (680 µg) a day
amazingnutrition.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 35
Nature Made
Folic Acid
Folic acid · Tablets
100Very good qualityCountry not stated1.7¢per 400 µg
108% more
- Pack
- $6.99250 tablets
- Folate per serving
- 665 µgin 1 tablet
- Pack lasts
- 250 daysat 1 tablet (665 µg) a day
naturemade.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 36
Natural Factors
Folic Acid
Folic acid · Tablets
80Good qualityMade in Canada1.7¢per 400 µg
108% more
- Pack
- $6.4690 tablets
- Folate per serving
- 1,700 µgin 1 tablet
- Pack lasts
- 90 daysat 1 tablet (1,700 µg) a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 37
Solgar
Folate, 1,333 mcg DFE
Folate · Capsules
80Good qualityCountry not stated1.9¢per 400 µg
140% more
- Pack
- $16.22250 capsules
- Folate per serving
- 1,333 µgin 1 capsule
- Pack lasts
- 250 daysat 1 capsule (1,333 µg) a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 38
The Vitamin Shoppe
Folic Acid, 680 mcg DFE
Folic acid · Tablets
80Good qualityCountry not stated2.2¢per 400 µg
166% more
- Pack
- $10.99300 tablets
- Folate per serving
- 680 µgin 1 tablet
- Pack lasts
- 300 daysat 1 tablet (680 µg) a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 39
Amazing Nutrition
Amazing Formulas Folic Acid - 400 Mcg
Folic acid · Tablets
85Good qualityCountry not stated2.4¢per 400 µg
190% more
- Pack
- $9.99250 tablets
- Folate per serving
- 680 µgin 1 tablet
- Pack lasts
- 250 daysat 1 tablet (680 µg) a day
amazingnutrition.com (opens in a new tab)Checked Nov 1, 2026 · Label
- Rank 40
Futurebiotics
Folic Acid From Lemon Peel, 800 mcg
Folic acid · Tablets
80Good qualityMade in USA2.5¢per 400 µg
205% more
- Pack
- $9.87120 tablets
- Folate per serving
- 1,333 µgin 1 tablet
- Pack lasts
- 120 daysat 1 tablet (1,333 µg) a day
vitacost.com (opens in a new tab)Checked Nov 1, 2026 · Label
Good to know
- Fact
- 4,302%more per 400 µg for the most expensive product than for the cheapest.
- Fact
- 213%more per 400 µg for the cheapest methylfolate than for the cheapest folic acid.
How we checked: one-time price for each size in the store’s US online shop, before sales tax and shipping, without subscriptions or coupons. Prices change often, so check the store before you buy. More on how we check
The amount we compare by only makes products comparable – it is not a dosage recommendation. Not medical advice.
How we calculate
Cost per dose = price ÷ (servings × amount per serving) × comparison amount. Example: $119.99 for 74 servings with 24 g of protein each is 1,776 g of protein. $119.99 ÷ 1,776 g × 30 g = $2.03 per 30 g of protein.
Found a mistake or a product we should add? Email us