Circulating Unmetabolized Folic Acid: Relationship to Folate Status and Effect of Supplementation
Figure 9
Plasma concentrations of unmetabolized folic acid among women who supplemented with either 1.1 mg or 5 mg of folic acid (all participants combined). When pooled data from both groups were analyzed, there was a significant change in plasma folic acid concentrations (). (*) There was a significant decline from week 12 to week 30 ().