Folate — answers to Vitamin B9
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A water-soluble B vitamin found naturally in leafy greens and legumes as folate, and added to supplements and fortified foods as the synthetic form folic acid.
Why it’s used
Taken to support cell division and red blood cell formation, and specifically recommended around pregnancy to support neural tube development.
What the evidence is for
reducing neural tube defect risk when taken before and during early pregnancy.
What the evidence says
NIH ODS describes evidence for folic acid reducing neural tube defect risk when taken before and during early pregnancy as well established. Evidence for benefit from folate supplementation outside of pregnancy or known deficiency is much less clear.
Dose studied
400–1000 mcg — RDA to tolerable upper intake level for adults, per NIH ODS.
Context
The pregnancy-related evidence is specific to the periconceptional period and studied primarily in the synthetic folic acid form rather than natural dietary folate.
Educational information, not medical or safety advice. Consult a professional for allergies or medical concerns.