Last week, many in the nutrition and medical fields let out a collective sigh. That’s because there is good quality nutrition research, from actual humans in randomized control trials, showing the importance of folic acid supplementation during pregnancy. Taking a multivitamin with 400 mcg of folic acid (the form of folate found in most supplements) can prevent birth defects associated with the brain and spinal cord. And organizations like the March of Dimes have done a good job getting the word out about folic acid to women of childbearing age. The FDA even just announced it would allow corn flour to be fortified with folic acid, in order to prevent birth defects among women who eat corn as a staple in their diet.