The whole study duration will be eleven weeks (excluding screening and pilot testing). Participants will donate one blood sample at screening and two blood samples during the remaining study period. Between Monday and Friday, the participants will receive two meals per day, one in the morning (first meal) and one at noon (second meal). One type of test meal will always be administered throughout five consecutive days. In total each participant will receive 60 rice meals each meal consisting of approximately 50 g regular unfortified rice, 0.5 g extruded fortified rice, 30 g sauce and 250 ml water. The definite rice amount administered will be decided upon after a pilot investigation. The order of the test meals given in each week will be partially randomized. Thus, if test meals A, B or C will be given throughout 1 week between weeks 1 and 3, test meals D, E and R will be given between weeks 6 and 8. Meals containing iron with the same molecular weight (58 Fe, 57Fe and 54Fe) have to be administered at least 16 days apart from each other, which is the only restriction for randomization. The participants are not allowed to eat after 8 PM and to drink after 12 AM on the day before each study visit, between the meals and for three hours after they finished their second meal, unless they are given snacks by the investigators and are explicitly allowed to eat those. Each meal administration will take approximately 25 minutes. This procedure will be followed for six weeks, with a two weeks break between weeks 3 and 6 (no dietary restrictions within the break-period).