Vitamin B12 and the Risk of Neural Tube Defects in a Folic-Acid-Fortified Population

BACKGROUND: Low maternal vitamin B(12) status may be a risk factor for neural tube defects (NTDs). Prior studies used relatively insensitive measures of B(12), did not adjust for folate levels, and were conducted in countries without folic acid food fortification. In Canada, flour has been fortified... View More