Food Fortification to Prevent Neural Tube Defects.

Editorial. Argues that food fortification works to prevent neural tube defects (NTDs). Analysis of a study by Honein et al in the June 20, 2001 issue of the 'Journal of the American Medical Association,' which examined the impact of food fortification with folic acid on NTDs; Questions raised by this study; Guidelines for folic acid use by pregnant women.