All children will undergo medical and anthropometric examinations at 6-weekly intervals and disease symptoms monitoring every week. Dietary intake assessments will be conducted at 3 and 9 weeks after the onset of supplementation. A blood sample will be collected at the beginning and end of the study to measure blood haemoglobin and serum ferritin concentrations. At enrolment, children's HIV status will be screened with antibody-ELISA and confirmed with HIV PCR.