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The mandatory fortification of flour with folate in Canada towards
the end of 1998 appears to have taken place in the middle of an existing
fall in the incidence of all neural tube defects. If anything the fall
appears to have been greater before the fortification. It is difficult to
see how the conclusion can be drawn that it was the mandatory programme
that was the cause of the reduction.
Neural Tube defects fall before folate added to flour in Canada
The mandatory fortification of flour with folate in Canada towards
the end of 1998 appears to have taken place in the middle of an existing
fall in the incidence of all neural tube defects. If anything the fall
appears to have been greater before the fortification. It is difficult to
see how the conclusion can be drawn that it was the mandatory programme
that was the cause of the reduction.
Competing interests:
None declared
Competing interests: No competing interests