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The concentrations of breast milk folate from 1 to 400 days postpartum (A). The distribution of folate species over 1–400 days postpartum (B). The minor reduced folate represents the sum of THF, 5,10-methenyl-THF and 5-formyl-THF; 5-MTHF, 5-methyltetrahydrofolate; UMFA unmetabolized folic acid.
