Regular consumption of a complementary food fortified with ascorbic acid and ferrous fumarate or ferric pyrophosphate is as useful as ferrous sulfate in maintaining hemoglobin concentrations >105 g/L in young Bangladeshi children

L Davidsson, S. A Sarker, K. A Jamil, S Sultana and R. Hurrell

American Journal of Clinical Nutrition 89 ( 6 ): 1815 - 1820 , 2009