Final answer:
Folate supplementation of at least 400 µg/day is recommended for women who might become pregnant to prevent neural tube defects. Adequate folate intake is essential early in pregnancy, often before pregnancy is confirmed, hence the need for preconception supplementation.
Step-by-step explanation:
The correct statement about folate is that folate supplementation is recommended for women who might become pregnant. The Food and Nutrition Board of the Institute of Medicine advises this because folate is essential for the prevention of neural tube defects (NTDs) such as spina bifida and anencephaly. These defects occur early in pregnancy, often before a woman knows she is pregnant, hence the recommendation for folate intake before pregnancy is documented. Furthermore, while current grain fortification has reduced the incidence of NTDs, women who are planning to become pregnant or who could become pregnant should consume at least 400 µg/day of folate from supplements or fortified foods to ensure adequate levels. A healthy diet and prenatal care, which may include additional prenatal vitamins, can help minimize the risk of complications and support the health of both the mother and the fetus.