Folic AcidDietFolic Acid DeficiencyNeural Tube DefectsDietary SupplementsTetrahydrofolatesFood, FortifiedHomocysteineVitamin B 12Vitamin B ComplexFolic Acid AntagonistsPreconception CareFolate Receptors, GPI-AnchoredHyperhomocysteinemiaAnemia, MacrocyticDiet, ReducingVitamin B 6HematinicsPteroylpolyglutamic AcidsPregnancyVitamin B 12 DeficiencyFolic Acid TransportersBreadVitaminsPrenatal CareFlourCerealsFolate Receptor 1Prenatal Nutritional Physiological PhenomenaDiet, High-FatMethylenetetrahydrofolate Reductase (NADPH2)Animal FeedNutritional RequirementsDiet, Fat-RestrictedDouble-Blind MethodFormyltetrahydrofolatesSpinal DysraphismAminopterinDietary FatsPyridoxineMicronutrientsDiet, MediterraneanBody WeightReduced Folate Carrier ProteinPterinsFIGLU TestBiological AvailabilityDietary ProteinsDiet, Protein-RestrictedMethotrexateDiet, VegetarianMaternal Nutritional Physiological PhenomenaMethylmalonic AcidHomocystineDiet, Carbohydrate-RestrictedNutritional StatusAnencephalyNutrition Policy4-Aminobenzoic AcidKetogenic DietMethionineRiboflavinRandom AllocationErythrocytesDiet RecordsEnergy IntakeDiet, AtherogenicIntestinal AbsorptionDietary FiberIronGlutamatesDietary CarbohydratesEatingDiet TherapyNutritive ValueDose-Response Relationship, DrugCleft PalateAnimal Nutritional Physiological PhenomenaVitamin B DeficiencyAnemia, MegaloblasticIron, DietaryPregnancy Complications, HematologicZincAdministration, OralAnemia, Iron-DeficiencyDiet SurveysPlacebosSwineOxidoreductases Acting on CH-NH Group DonorsPregnancy Complicationsgamma-Glutamyl HydrolaseAnemia, PerniciousCleft LipWeaningCross-Over StudiesInfant, NewbornFood, FormulatedBetaineDigestionDiet Fads