Folic acid: a public-health challenge

Area of Science:

• Public Health
• Nutritional Science
• Preventive Medicine

Background:

• Public health campaigns recommend folic acid supplementation to prevent neural tube defects (NTDs).
• Many women do not adhere to these recommendations, and NTDs remain a concern.
• Low adherence is linked to education level, age, and unplanned pregnancies.

Purpose of the Study:

• To evaluate the effectiveness of folic acid supplementation and fortification on NTD rates.
• To identify challenges and propose alternative public health strategies for folate status improvement.

Main Methods:

• Review of public health campaigns and fortification policies globally.
• Analysis of NTD rates in countries with and without mandatory fortification.
• Assessment of population folate and homocysteine status.

Main Results:

• Mandatory folic acid fortification in the USA, Canada, and Chile led to significant reductions in NTDs (31-78%).
• Many European countries show no decline in NTDs, indicating low adherence to recommendations.
• General populations in non-fortification countries often have inadequate daily food folate intake.

Conclusions:

• Mandatory folic acid fortification is effective in reducing NTDs and improving population folate status.
• Challenges to mandatory fortification include unproven benefits and concerns about health risks and choice.
• Creative public health approaches are necessary to improve folate status and prevent NTDs globally.