Figure 1From: Usual choline and betaine dietary intake and incident coronary heart disease: the Atherosclerosis Risk in Communities (ARIC) Study Metabolism of homocysteine and the remethylationto methionine by the alternative folate and betaine pathways. THF: tetrahydrofolate; MTHFR: methylentetrahydrofolate reductase; BHMT: betaine-homocysteine methyltransferase; MTR: methionine synthase reductase. Note: in boxes – choline, betaine, folate and methionine concentrations in plasmaBack to article page