What dose of Folic Acid is effective for Congenital anomaly?

Folic Acid at 800 mcg lands inside the studied 400-4000 mcg window. DoseRank scores this product's dose fit at 69 out of 100.

Does DoseRank get paid to rank a product first?

No. Retailer links may be affiliate links, but rankings and placement are never paid. Every product is scored by the same public model, and the ranking is recomputed from the underlying product data rather than edited by hand.

The short answer · Congenital anomaly

Take folic acid for congenital anomaly. This is the one to buy.

Q: How much does the best Congenital anomaly supplement cost?

NOW Foods, Folic Acid, 250 Tablets works out at $0.02 per serving. $0.02 per serving — low price tier for this outcome. The cheapest ranked pick here is $0.02 per serving.

NOW Foods, Folic Acid, 250 Tablets

4.8· 44,219 ratings· $0.02/serving

DoseRank score88

Folic Acid 800 mcg — inside the studied 400-4000 mcg window

Of 3,180 products scored for Congenital anomaly, NOW Foods, Folic Acid, 250 Tablets ranks #1 with a DoseRank score of 88. Folic Acid is the strongest evidence signal for this outcome.

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Cheaper alternative$0.02 per serving21st Century, Folic Acid, 400 mcg, 250 Easy to Swallow Tablets

Retailer links may be affiliate links. Rankings and placement are never paid.

The form“Why Folic Acid — not Calcium L-Methylfolate?”

Folic Acid is the strongest evidence signal for this outcome.

Folic AcidThe pick
Strong evidence · 800 mcg
Synthetic, oxidized form of folate (vitamin B9); must be converted to 5-MTHF, a step impaired by MTHFR variants — methylfolate is preferred when conversion is a concern.
Calcium L-Methylfolate
Strong evidence · 1360 mcg
A calcium salt of active 5-MTHF; delivers ready-to-use folate without the enzymatic conversion folic acid requires, useful for those with MTHFR variants.

Buy the #1 pick

The dose“Is the dose actually effective?”

Folic Acid at 800 mcg lands inside the studied 400-4000 mcg window.

Folic Acid

Studied window 400-4000 mcg · this pick 800 mcg

25 mcg

The ranking“Why should I trust this pick?”

Strong trust signals — consistently high marks from verified buyer ratings. Each product gets a DoseRank score blending clinical strength, evidence, dose fit, trust and value. Retailer links may be affiliate links — the scoring model decides placement, never payment from a brand.

3,180 products scored
Never paid placement
Evidence level: Strong · 92
331 brands
12 ingredients

See the full analysis — every score, every product How the ranking works

The price“Can I do better than $0.02 a serving?”

$0.02 per serving — low price tier for this outcome. The cheapest ranked pick here is $0.02 per serving.

2
21st Century, Folic Acid, 400 mcg, 250 Easy to Swallow TabletsScore 88 · $0.02/serving
iHerb

Why not the absolute cheapest? The DoseRank score also weighs clinical strength, evidence, dose fit and trust — the very cheapest listings rarely hold up everywhere else.

Ready?

The #1 pick is $0.02 a serving.

NOW Foods, Folic Acid, 250 Tablets — in stock at a tracked retailer.

View on iHerb

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NOW Foods, Folic Acid, 250 Tablets ranks #1 for Congenital anomaly with a DoseRank score of 88. The score blends clinical strength, evidence, dose fit, trust signals and value across 3,180 products scored for this outcome.

Frequently asked