Voluntary food fortification with folic acid in Spain: predicted contribution to children's dietary intakes as assessed with new food folate composition data.

The Spanish market offers a significant number of folic acid (FA) voluntarily fortified foods. We analysed FA and (6S)-5-methyltetrahydrofolic acid ((6S)-5-CH3-H4PteGlu) content in ready-to-eat cereals (RTEC) (n=68) and cow's milk (n=25) by a previously validated affinity chromatography-HPLC method. Contribution to potential FA intakes for children aged 2-13years, was assessed using food consumption data from a representative nationwide study, folate Recommended Dietary Intakes (RDI), and Upper Levels (UL). Results showed that at all food fortification levels obtained, fortified products provided more than tenfold FA than (6S)-5-CH3-H4PteGlu. For RTEC, the high fortification level provided 6-21%, per serving, of RDI and ⩽32% of ULs at 90th percentile of RTEC consumption (P90). Milk products fortified at the higher level reached on average 54-136% of RDI per serving and only exceeded UL at P90 of milk consumption in children aged 2-5years.