HomocysteineVitamin B 12HyperhomocysteinemiaFolic AcidMethylenetetrahydrofolate Reductase (NADPH2)Cystathionine beta-SynthaseVitamin B 6CystathionineMethionineEnergy IntakeDietEatingHomocystineVitamin B ComplexDietary ProteinsBetaine-Homocysteine S-Methyltransferase5-Methyltetrahydrofolate-Homocysteine S-MethyltransferaseDietary SupplementsS-AdenosylhomocysteineBody WeightHomocystinuriaOxidoreductases Acting on CH-NH Group DonorsFolic Acid DeficiencyDietary FatsDiet RecordsVitamin B 12 DeficiencyRisk FactorsCalcium, DietaryVegetablesDietary CarbohydratesDrinkingDiet SurveysPyridoxineNutritional RequirementsBetaineFeeding BehaviorMethylmalonic AcidNutritional StatusAnimal FeedFruitEnergy MetabolismFood HabitsSodium, DietaryS-AdenosylmethionineSodium Chloride, DietaryDietary FiberCross-Over StudiesBeveragesPotassium, DietaryFood, FortifiedHomocysteine S-MethyltransferaseWeight GainFood PreferencesCoffeeVitaminsFastingBiological MarkersAlcohol DrinkingNitrogen5,10-Methylenetetrahydrofolate Reductase (FADH2)Case-Control StudiesDose-Response Relationship, DrugProspective StudiesGlycine N-MethyltransferaseDairy ProductsNutrition AssessmentCerealsAnimal Nutritional Physiological PhenomenaTetrahydrofolatesNutrition PolicyCardiovascular DiseasesCysteineBody CompositionNutrition SurveysGenotypeRandom AllocationVitamin B DeficiencyTime FactorsCross-Sectional StudiesDigestionQuestionnairesAnalysis of VarianceCohort StudiesLipidsBody Mass IndexRegression AnalysisVitamin B 6 DeficiencyLactationAdenosylhomocysteinaseFoodTranscobalaminsDiet, Sodium-RestrictedAscorbic AcidLiverDouble-Blind MethodMilkPolymorphism, GeneticPregnancyBlood GlucoseFood Deprivation