Determination of Changes in Total Body Stores of Vitamin A in Response to Orange Maize Consumption by Zambian Children

Inclusion Criteria: 1. Children aged 57-88 months at the time of initiation of the study 2. Children living in the locality defined by the study and not enrolled in school. 3. Consent from parent/guardian. Exclusion Criteria: 1. Severely malnourished children (weight for age or height z-scores \<-3 standard deviations below the WHO growth reference standards) 2. Children found to be below 57 months and still holding an under five card or above 88 months at the time of initiation of the study or enrolled in school, based on verification of birth dates at screening 3. Children whose families plan to leave the study area before completion of the study 4. Consent not obtained from parent/guardian 5. Children suffering from diarrhea at the time of initiation of the study or with high fever, based on the report of symptoms by the parent/guardian 6. Children with severe anemia (Hb \<7.0 g/dL) as determined at the baseline blood draw.