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Folic acid: miscarriages, anomalies, thromboses, cancers.

T F Thurmon1

  • 1Louisiana State University School of Medicine, Shreveport, Louisiana, USA.

The Journal of the Louisiana State Medical Society : Official Organ of the Louisiana State Medical Society
|March 23, 2001
PubMed
Summary

Folic acid (vitamin B9) is crucial, yet many diets are deficient. Genetic variations, like the MTHFR variant, increase folic acid needs, potentially leading to health issues if unmet.

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Area of Science:

  • Biochemistry
  • Nutritional Science
  • Genetics

Background:

  • Folic acid is an essential micronutrient vital for numerous physiological processes.
  • Despite availability in balanced diets, inadequate intake is prevalent due to food processing and suboptimal dietary habits.
  • Hereditary variations in enzymes, particularly methylenetetrahydrofolate reductase (MTHFR), significantly impact folic acid requirements and metabolism.

Purpose of the Study:

  • To highlight the critical role of folic acid in human health.
  • To address the challenges of inadequate folic acid intake.
  • To discuss the implications of genetic variations on folic acid metabolism and requirements.

Main Methods:

  • Literature review of recent data on folic acid intake and metabolism.
  • Analysis of the impact of hereditary MTHFR variants on folic acid requirements.
  • Evaluation of dietary guidance and supplementation strategies.

Main Results:

  • Inadequate folic acid intake is widespread, influenced by food processing and dietary practices.
  • The thermolabile MTHFR variant necessitates increased folic acid intake to prevent adverse health outcomes, including pregnancy loss, birth defects, thrombosis, and cancer.
  • Other genetic variations in folic acid metabolism pathways also alter nutrient requirements.
  • Mandated folate fortification presents challenges, potentially leading to inadequate or excessive levels for certain individuals.

Conclusions:

  • Optimal folic acid management involves personalized dietary guidance and supplementation.
  • Laboratory tests, including red cell folate and serum homocysteine, are valuable for assessing folate status.
  • Addressing genetic predispositions is key to preventing folic acid-related health complications.

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