Folic acid supplementation before conception prevents neural tube defects
Extensive scientific and clinical evidence consistently demonstrates that periconceptional folic acid supplementation significantly prevents the occurrence and recurrence of neural tube defects.
The claim is specific, empirical, and testable. Multiple randomized controlled trials, systematic reviews, meta-analyses, and clinical guidelines (e.g., Cochrane reviews, USPSTF) overwhelmingly support the finding that periconceptional folic acid supplementation prevents neural tube defects. There are no refuting papers.
Andrew E. Czeizel, István Dudás. Prevention of the First Occurrence of Neural-Tube Defects by Periconceptional Vitamin Supplementation. 1992. https://doi.org/10.1056/nejm199212243272602
Demonstrated that periconceptional multivitamin supplementation containing folic acid significantly reduces the first occurrence of neural-tube defects.
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Luz Maria De‐Regil, Juan Pablo Peña‐Rosas, Ana Cecilia Fernández‐Gaxiola, Pura Rayco‐Solon. Effects and safety of periconceptional oral folate supplementation for preventing birth defects. 2015. https://doi.org/10.1002/14651858.cd007950.pub3
A Cochrane review concluding that daily folic acid supplementation has a protective effect in preventing neural tube defects.
Hannah Blencowe, Simon Cousens, B. Modell, Joy E Lawn. Folic acid to reduce neonatal mortality from neural tube disorders. 2010. https://doi.org/10.1093/ije/dyq028
Indicates that folic acid supplementation and fortification effectively reduce neural tube defects and associated mortality.
A. Czeizel, István Dudás, Attila Vereczkey, Ferenc Bánhidy. Folate Deficiency and Folic Acid Supplementation: The Prevention of Neural-Tube Defects and Congenital Heart Defects. 2013. https://doi.org/10.3390/nu5114760
Highlighted that periconceptional folic acid multivitamin supplementation prevented a major proportion of neural-tube defects.
US Preventive Services Task Force, Kirsten Bibbins‐Domingo, David C. Grossman, Susan J. Curry, Karina W. Davidson, John W. Epling, Francisco García, Alex R. Kemper, Alex H. Krist, Ann Kurth, C. Seth Landefeld, Carol M. Mangione, William R. Phillips, Maureen G. Phipps, Michael Pignone, Michael Silverstein, Chien‐Wen Tseng. Folic Acid Supplementation for the Prevention of Neural Tube Defects. 2017. https://doi.org/10.1001/jama.2016.19438
The USPSTF recommendation confirming that daily periconceptional folic acid supplementation prevents neural tube defects with substantial net benefit.
Andrew E. Czeizel. Periconceptional folic acid and multivitamin supplementation for the prevention of neural tube defects and other congenital abnormalities. 2009. https://doi.org/10.1002/bdra.20563
Found a high reduction of primary neural tube defects following periconceptional folic acid and multivitamin supplementation.
Andrew E. Czeizel. Periconceptional Folic Acid-Containing Multivitamin Supplementation for the Prevention of Neural Tube Defects and Cardiovascular Malformations. 2011. https://doi.org/10.1159/000332125
Affirms that the prevention of neural tube defects with periconceptional folic acid supplementation is accepted by the scientific community.
Li J, Chen B, Liu N, Dong W, Lv D, Li S, Zhu X. Best Evidence Summary of Folic Acid Supplementation for Prevention of Neural Tube Defects in Women of Childbearing Age.. 2026. https://doi.org/10.3390/nu18040641
Summarized best evidence establishing that initiating folic acid supplementation before conception prevents neural tube defects.
Owere B, Nalumaga PD, Nkoyooyo D, Ayesiga I. Morphological Variants and Factors Associated With Neural Tube Defects at a Regional Referral Hospital.. 2026. https://doi.org/10.1002/hsr2.72591
Identified a lack of folic acid supplementation as a significant risk factor associated with neural tube defects.
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