Why should pregnant women take folic acid?

Your baby needs the nutrient folate because folate has a direct effect on DNA. Folate is an essential ingredient for one of the building blocks of DNA, and without folate, you have to substitute a back-up building block (called uracil), which isn't as good as the other (thiamine) and can cause birth defects, primarily spina bifida. Also, a lack of folate has also been shown to increase childhood cancer rates by more than 60 percent.

A startling statistic, for sure, but one that reinforces the notion we just talked about -- in-utero nutrients influence out-of-utero health. If you're even thinking about getting pregnant, you need to supplement with 400 micrograms folic acid every day.

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