I've been very happy with GNC's prenatal vitamins. I'm usually somewhat sensitive to vitamins, but I've taken these on both a full and empty stomach and haven't had any problems. I got these after I looked at several varieties of prenatals, and I was very concerned with the high amounts of vitamins in the others I looked at. You're supposed to take two of the GNC pills a day, but I just take one (that still provides 400 mg folic acid); my doctor said that was fine and that I didn't need to take both. They also say they have no sugar, no artificial colors, no artificial flavors, no preservatives, no sodium, no wheat, no gluten, no soy, and no dairy.