So how did women successfully give birth to normal *healthy babies before the invention of folic acid supplements?

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A healthy balanced diet is not vague or difficult to determine:

Step 1 - Buy vegetables and some meat
Step 2 - Cook and eat it
Step 3 - Profit

If you have a look at the Jimbo's big bag'o'trivia page for Folic Acid, under sources of folate, quite a lot of foods contain folic acid and deficiency is unusual with a western diet.

The point is though that taking a supplement to make sure is a really easy and simple thing to do to significantly reduce the risk of a rare but nasty problem. There's a nice graph here from the CDC showing the rates of Spina Bifida and how folate advice has changed that rate in the U.S.
>> ^notarobot:

So how did women successfully give birth to normal healthy babies before the invention of folic acid supplements?

*learn

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