HomocysteineHyperhomocysteinemiaVitamin B 12Folic AcidMethylenetetrahydrofolate Reductase (NADPH2)HomocystineVitamin B 6Vitamin B ComplexCystathionine beta-SynthaseOxidoreductases Acting on CH-NH Group DonorsMethionineVitamin B 12 Deficiency5-Methyltetrahydrofolate-Homocysteine S-MethyltransferaseFolic Acid DeficiencyBetaine-Homocysteine S-MethyltransferaseHomocystinuriaRisk FactorsPyridoxine5,10-Methylenetetrahydrofolate Reductase (FADH2)S-AdenosylhomocysteineHydroxocobalaminBiological MarkersMethylmalonic AcidCardiovascular DiseasesVitamin B DeficiencyGypsiesCreatinineDietary SupplementsGenotypeCystathionineS-AdenosylmethionineVitamin B 6 DeficiencyFastingProspective StudiesPolymorphism, GeneticCase-Control StudiesFollow-Up StudiesHematinicsSlovakiaDouble-Blind MethodReference ValuesHLA-B51 AntigenTime FactorsPyridoxal PhosphateVascular DiseasesKidney Failure, ChronicRegression AnalysisRenal DialysisArteriosclerosisBetaineStrokeDietCohort StudiesTreatment OutcomeHealthy VolunteersCross-Sectional StudiesPredictive Value of TestsNutritional StatusFood, FortifiedCystatinsC-Reactive ProteinLipidsVitaminsEndothelium, VascularHomocysteine S-MethyltransferaseThrombophlebitisReduced Folate Carrier ProteinBehcet SyndromeAnalysis of VarianceHomozygoteCoronary DiseaseMultivariate AnalysisLinear Models