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Table 3 Serum folate and serum folic acid (μg/l). Samples collected on day 7 of regime B bread (100 μg in each slice) pre and post prandially.

From: Folic acid fortification and public health: Report on threshold doses above which unmetabolised folic acid appear in serum

  pre 1st slice 1 hour post 2 hrs post 3 hrs post 4 hrs post 1 hour post 2nd slice 2 hrs post 3 hrs post
Serum folate i ii iii iv v vi vii viii
Mean 14.1111 14.70 15.16 14.72 14.41 14.43 13.84 13.28
SD 5.24 5.59 4.99 5.32 5.83 5.78 5.25 5.47
CI (95%) 11.59 – 16.63 12.00 – 17.39 12.75 – 17.56 12.16 – 17.28 11.60 – 17.22 11.65 – 17.22 11.23 – 16.45 10.46 – 16.10
  1. This table illustrates mean total serum folate (μg/L) concentrations in a group of healthy adult subject (n = 19) exposed to a folic fortified bread for 1-week. Subject were pre-saturated with folic acid supplements for 14-weeks prior to the bread. The bread was fortified with 100 μg folic acid per slice, which was administered twice a day for seven days. The samples shown here were collected on the 7th day of bread consumption pre-prandially and post-prandially. Standard deviations and confidence intervals are also shown. Serum folic acid was not detectable at any sampling points
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