What dose of Folic Acid is effective for Stroke?

Folic Acid at 800 mcg lands inside the studied 400-800 mcg window. DoseRank scores this product's dose fit at 90 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 · Stroke

Take folic acid for stroke. This is the one to buy.

Q: How much does the best Stroke 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 400-800 mcg window

Of 3,824 products scored for Stroke, 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?”

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.

Buy the #1 pick

The dose“Is the dose actually effective?”

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

Folic Acid

Studied window 400-800 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.

3,824 products scored
Never paid placement
Evidence level: Strong · 92
438 brands
6 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.

6
21st Century, Folic Acid, 400 mcg, 250 Easy to Swallow TabletsScore 86 · $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 Stroke with a DoseRank score of 88. The score blends clinical strength, evidence, dose fit, trust signals and value across 3,824 products scored for this outcome.

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