Scientific knowledge of folic acid has increased greatly in recent years. Its endless and announced beneficial effects have motivated the food administrations of several countries, which since 1997 have been establishing measures to strengthen bread flour with this substance. But they are measures that are not completely harmonized, perhaps because folic acid continues to hold surprises. The iron deficiency that athletes frequently experience is not always considered anemia. Anemia caused by a lack of iron in the body is the most common nutritional deficiency among pregnant women.