HomocysteineHyperhomocysteinemiaVitamin B 12Folic AcidMethylenetetrahydrofolate Reductase (NADPH2)HomocystineOxidoreductases Acting on CH-NH Group DonorsCystathionine beta-SynthaseVitamin B 6Vitamin B ComplexMethionineBetaine-Homocysteine S-MethyltransferaseFolic Acid Deficiency5-Methyltetrahydrofolate-Homocysteine S-MethyltransferasePyridoxineHLA-B51 AntigenRisk FactorsS-AdenosylmethionineGenotypeDietary SupplementsS-AdenosylhomocysteineVitamin B 12 DeficiencyHomocystinuriaCreatinineFastingBiological MarkersPolymorphism, GeneticCardiovascular DiseasesBetaineCase-Control StudiesCystathionine5,10-Methylenetetrahydrofolate Reductase (FADH2)Methylmalonic AcidVitamin B 6 DeficiencyRegression AnalysisVitamin B DeficiencyLipotropic AgentsProspective StudiesPlasmaTime FactorsTetrahydrofolatesHematinicsPyridoxal PhosphateGlycine N-MethyltransferaseReference ValuesSarcosineVascular DiseasesHydroxocobalaminDouble-Blind MethodDietCysteineArteriosclerosisVitaminsNutritional StatusChromatography, High Pressure LiquidGypsiesMethylenetetrahydrofolate Dehydrogenase (NADP)Renal DialysisKidney Failure, ChronicFood, FortifiedHomozygoteEndothelium, VascularCholineLipidsAnalysis of VarianceHomocysteine S-MethyltransferaseCross-Sectional StudiesNicotinamide N-MethyltransferasePhosphatidylethanolamine N-MethyltransferaseSarcosine DehydrogenaseLiverMethylationGuanidinoacetate N-MethyltransferaseCholesterolFluorescence Polarization ImmunoassayDose-Response Relationship, DrugCoronary DiseaseCholine DeficiencyCholesterol, HDLNeural Tube DefectsMalondialdehydeStrokeRiboflavinMethyltransferasesFerredoxin-NADP ReductaseC-Reactive ProteinFollow-Up StudiesTriglyceridesSlovakiaCoronary Artery DiseaseLinear ModelsCohort StudiesOdds RatioAge FactorsOxidative StressAdenosylhomocysteinaseSex FactorsPredictive Value of TestsGene FrequencyPeripheral Vascular Diseases