End Study data collection: An end study similar to the baseline, anthropometric measurements will be taken and again a 5ml blood sample (approx one spoonful of blood) will be obtained to assess the difference in the markers at baseline and end study. Blood/urine sampling will not be done for the children in the pure control (no intervention group). Detailed developmental assessments using a battery of computerized neuropsychological (CANTAB) and cognition tests (WISC, K-CPT and WCST) will be conducted. Academic achievement will be assessed using school report cards.