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the claim

Consuming sufficient folic acid before and during pregnancy prevents most neural tube defects.

the verdict
SUPPORTED
the evidence backs this
Recorded sources
9 sources for · 0 against

Counts group repeated records of the same source within each side. They do not measure evidence strength or source independence.

Is it true that consuming sufficient folic acid before and during pregnancy prevents most neural tube defects?

Yes. Substantial clinical and epidemiological evidence demonstrates that adequate periconceptional folic acid supplementation significantly prevents neural tube defects. Public health programs globally consistently associate timely folate intake with major reductions in these congenital malformations.

Verdict: SUPPORTED · 9 sources for, 0 against · Last checked

The analysis

The retrieved literature unanimously supports the well-established medical consensus that periconceptional folic acid supplementation prevents neural tube defects. Multiple clinical guidelines, randomized trials, and epidemiological studies across diverse regions validate this efficacy. Therefore, the claim is strongly supported.

Evidence for · 9
Periconceptional folic acid and multivitamin supplementation for the prevention of neural tube defects and other congenital abnormalities
2009
Czeizel (2009) demonstrated that periconceptional folic acid and multivitamin supplementation reduces primary neural tube defects by approximately 90%.
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Czeizel, A. E. (2009). Periconceptional folic acid and multivitamin supplementation for the prevention of neural tube defects and other congenital abnormalities. doi.org. https://doi.org/10.1002/bdra.20563

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More for · 8
Periconceptional Folic Acid-Containing Multivitamin Supplementation for the Prevention of Neural Tube Defects and Cardiovascular Malformations
2011
Czeizel (2011) affirms that the prevention of neural tube defects via periconceptional folic acid supplementation is widely accepted by the scientific community.
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Czeizel, A. E. (2011). Periconceptional Folic Acid-Containing Multivitamin Supplementation for the Prevention of Neural Tube Defects and Cardiovascular Malformations. doi.org. https://doi.org/10.1159/000332125

Best Evidence Summary of Folic Acid Supplementation for Prevention of Neural Tube Defects in Women of Childbearing Age.
2026
Best Evidence Summary (2026) outlines clinical guidelines confirming the robust role of periconceptional folic acid supplementation in preventing neural tube defects.
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J, L., B, C., N, L., W, D., D, L., S, L., & X, Z. (2026). Best Evidence Summary of Folic Acid Supplementation for Prevention of Neural Tube Defects in Women of Childbearing Age.. doi.org. https://doi.org/10.3390/nu18040641

A Case of Neural Tube Defect in Early Pregnancy Following Sulfasalazine Exposure Without Folic Acid Supplementation.
2026
A case report by a clinical team (2026) highlights the onset of fetal spina bifida when adequate folic acid supplementation is omitted alongside antifolate medications.
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F, H. & R, H. (2026). A Case of Neural Tube Defect in Early Pregnancy Following Sulfasalazine Exposure Without Folic Acid Supplementation.. doi.org. https://doi.org/10.1155/crrh/8352167

Association of premarital medical check-ups and folic acid knowledge, attitudes, and practices with the occurrence of neural tube defects in Guangxi, China (2009-2023).
2026
A population study in China by Guangxi researchers (2026) shows that rising folic acid supplementation rates strongly predict significant declines in neural tube defect incidence.
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X, L., Y, P., & J, Z. (2026). Association of premarital medical check-ups and folic acid knowledge, attitudes, and practices with the occurrence of neural tube defects in Guangxi, China (2009-2023).. doi.org. https://doi.org/10.7189/jogh.16.04129

Maternal Folic Acid Supplementation and Neural Tube Defects in Northeast Iran: Insights for Developing Countries.
2026
An Iranian case-control study (2026) confirms that failing to take maternal folic acid supplementation significantly increases the likelihood of neural tube defects.
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V, V. & SM, F. (2026). Maternal Folic Acid Supplementation and Neural Tube Defects in Northeast Iran: Insights for Developing Countries.. doi.org. https://doi.org/10.2147/phmt.s629730

The critical gap in prevention: knowledge of periconception folic acid supplementation and its predictors among pregnant women in Ethiopia.
2026
An Ethiopian study (2026) reiterates that periconceptional folic acid supplementation is highly effective in reducing fetal neural tube defects.
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T, G., DT, H., B, A., & G, G. (2026). The critical gap in prevention: knowledge of periconception folic acid supplementation and its predictors among pregnant women in Ethiopia.. doi.org. https://doi.org/10.1186/s40748-026-00254-x

Morphological Variants and Factors Associated With Neural Tube Defects at a Regional Referral Hospital.
2026
A regional hospital study (2026) identifies a lack of folic acid supplementation as a major risk factor significantly associated with open neural tube defects.
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B, O., PD, N., D, N., & I, A. (2026). Morphological Variants and Factors Associated With Neural Tube Defects at a Regional Referral Hospital.. doi.org. https://doi.org/10.1002/hsr2.72591

The prevalence of neural tube defects in eastern Ethiopia: A population-based surveillance.
2026
Population-based surveillance in Ethiopia (2026) recommends comprehensive preventive strategies including folic acid supplementation to reduce the burden of neural tube defects.
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H, H., H, B., KT, R., S, A., M, D., G, M., MJ, M., MA, O., FA, H., TD, T., Y, T., Y, E., T, G., N, A., & L, M. (2026). The prevalence of neural tube defects in eastern Ethiopia: A population-based surveillance.. doi.org. https://doi.org/10.1371/journal.pgph.0007059

What does the evidence say?

The retrieved literature unanimously supports the well-established medical consensus that periconceptional folic acid supplementation prevents neural tube defects. Multiple clinical guidelines, randomized trials, and epidemiological studies across diverse regions validate this efficacy. Therefore, the claim is strongly supported.

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