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Updated: Jun 28, 2026
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Modifying Levels of Maternal Dietary Folic Acid or Choline to Study the Impact of Deficiencies on Offspring Health Outcomes
Published on: June 28, 2024
Do folic acid supplements reduce facial clefts?
1Orthodontic Department, Kettering General Hospital NHS Trust, Kettering, Northamptonshire, UK.
Evidence-Based Dentistry
|October 18, 2008
Summary
Folic acid supplements in early pregnancy significantly reduced the risk of cleft lip (with or without cleft palate). Dietary folate intake also showed a protective effect, with combined supplementation and diet offering the greatest risk reduction.
Area of Science:
- Public Health
- Nutritional Epidemiology
- Perinatal Medicine
Background:
- Cleft lip and palate are common congenital anomalies with multifactorial causes.
- Understanding the role of periconceptional nutrient intake is crucial for primary prevention strategies.
Discussion:
- This national population-based case-control study investigated the association between folic acid supplementation, dietary folate intake, and the risk of cleft lip with or without cleft palate and cleft palate alone.
- Adjustments were made for various potential confounders including maternal education, smoking, alcohol consumption, and multivitamin use.
Key Insights:
- Folic acid supplementation (400 µg/day) during early pregnancy was associated with a reduced risk of isolated cleft lip (with or without cleft palate) by approximately one-third.
- Diets rich in folate-containing foods also demonstrated a modest risk reduction.
- The lowest risk of cleft lip was observed in women who consumed folate-rich diets and took folic acid supplements and multivitamins.
- Folic acid supplementation did not provide protection against cleft palate alone.
Outlook:
- Further research into the synergistic effects of nutrient supplementation and dietary patterns on congenital anomaly prevention is warranted.
- Public health initiatives promoting periconceptional folic acid intake could significantly impact the incidence of cleft lip.
- Investigating the specific mechanisms underlying the protective effects of folate against cleft lip is an important future direction.
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