Betaine-Homocysteine S-MethyltransferaseHyperhomocysteinemiaFolic AcidVitamin B 12Cystathionine beta-SynthaseBetaineMethionineVitamin UHomocystineMethylenetetrahydrofolate Reductase (NADPH2)S-AdenosylmethionineS-AdenosylhomocysteineVitamin B ComplexVitamin B 6Choline DehydrogenaseCystathionine5-Methyltetrahydrofolate-Homocysteine S-MethyltransferaseSarcosineHomocystinuriaOxidoreductases Acting on CH-NH Group DonorsVitamin B 12 DeficiencyFolic Acid DeficiencyMethyltransferasesMethylmalonic AcidHomocysteineCholineHomocysteine S-MethyltransferasePyridoxine5,10-Methylenetetrahydrofolate Reductase (FADH2)ThionucleosidesGlycine N-MethyltransferaseDietTetrahydrofolatesCysteineDietary SupplementsLiverRisk FactorsAdenosylhomocysteinaseGenotypeVitamin B DeficiencyTranscobalaminsVitamin B 6 DeficiencyMethylationCystathionine gamma-LyaseBiological MarkersPolymorphism, Single NucleotidePyridoxal PhosphateLipotropic AgentsCardiovascular DiseasesPolymorphism, GeneticVascular DiseasesCysteic AcidCase-Control StudiesMethylenetetrahydrofolate Dehydrogenase (NAD+)FastingPhosphatidylethanolamine N-MethyltransferaseFluorescence Polarization ImmunoassaySulfhydryl CompoundsEndothelium, VascularFerredoxin-NADP ReductaseNeural Tube DefectsGene Expression Regulation, EnzymologicReference ValuesRiboflavinAmino Acids, SulfurVitaminsNutritional StatusSulfurFood, FortifiedTubercidinCreatinineGene FrequencyArteriosclerosisHematinicsDipeptidesRats, Sprague-DawleyMethionine-tRNA LigaseDose-Response Relationship, DrugRNA, MessengerCopper SulfateDouble-Blind MethodGuanidinoacetate N-MethyltransferaseMethylenetetrahydrofolate Dehydrogenase (NADP)Chromatography, High Pressure LiquidGlutathioneHomozygoteCross-Sectional StudiesNicotinamide N-MethyltransferaseLipoprotein(a)CoffeeProspective StudiesFatty LiverCholine DeficiencyC-Reactive ProteinOxidative StressMolecular Sequence DataSequence Analysis, DNARegression AnalysisMethionine AdenosyltransferaseAnalysis of Variance