AdenosylhomocysteinaseHyperhomocysteinemiaVitamin B 12Folic AcidHomocystineCystathionine beta-SynthaseMethylenetetrahydrofolate Reductase (NADPH2)MethionineVitamin B ComplexVitamin B 6Betaine-Homocysteine S-MethyltransferaseCystathionine5-Methyltetrahydrofolate-Homocysteine S-MethyltransferaseS-AdenosylhomocysteineHomocystinuriaOxidoreductases Acting on CH-NH Group DonorsVitamin B 12 DeficiencyFolic Acid DeficiencyMethylmalonic AcidBetaineS-AdenosylmethionineHomocysteine S-MethyltransferasePyridoxine5,10-Methylenetetrahydrofolate Reductase (FADH2)Glycine N-MethyltransferaseTetrahydrofolatesCysteineDietary Supplements