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5/5 Strong evidence

Pregnancy & deficiency support evidence brief

Folic acid

Folic acid is a supplemental form of vitamin B9. The main use is to support folate status and, before and during early pregnancy, to reduce neural tube defect risk.

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Folic acid has one of the clearest supplement use cases: preventing neural tube defects when taken before and during early pregnancy.

Strong for neural tube defect prevention health 6 linked sources Content audit 2026-05-16

Headline Finding

CDC and USPSTF recommend 400-800 mcg/day folic acid for people capable of pregnancy to reduce neural tube defect risk.

Dose Context

Common public-health guidance is 400 mcg/day folic acid for people who could become pregnant, with individualized dosing for higher-risk situations.

Important Caveat

This is life-stage prevention evidence, not a general energy supplement. Pregnancy planning and high-risk history should be discussed with a clinician.

Source Drawer

Linked Research

6 papers and evidence links - audit 2026-05-16
  1. Review NIH ODS folate fact sheet
  2. Review CDC folic acid overview
  3. Review CDC clinical facts
  4. Safety CDC folic acid safety
  5. Review Periconceptional folate review
  6. Review USPSTF recommendation

How To Read This Rating

The score reflects evidence that the supplement does its stated job. Some jobs are direct, such as strength, endurance, or recovery; others are indirect, such as sleep, mood, appetite, or health support. A real effect can still receive a cautious practical rating when dose, safety, product quality, or audience fit remain uncertain.

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