
Ironically, some of the worst problems were seen in health-minded folks who took supplements on top of eating a variety of folic-acid enriched foods. Breakfast cereals, some fortified with 100 percent of the daily recommendation of 400 micrograms (mcg), were a particularly potent source—especially for people who, like many of us, poured themselves a bigger serving than what was specified on the cereal box. “Some people got around 1,000 mcg of folic acid from breakfast alone,” says Morris.