here is CSPI's advice:If you take a multivitamin, avoid cereals, energy bars, or other foods or supplements that contain 400mcg of folic acid per serving. (If they have that much, the Nutrition Facts panel on the label will list the amount of folic acid as 100% DV.And if you are still nervous about excess folic acid (and are not at risk of becoming pregnant), take your multivitamin every other day