Up to 20 children aged 24-30 months and 20 school children aged 6-6.5 years living in each of 2 villages in the Oio region of Guinea-Bissau (total study population up to 80, with no minimum recruitment number) will be recruited for this study, with ages documented by the official birth record, which all families possess. Villages will be a convenience sample chosen from villages within the network of our local research partner International Partnership for Human Development. Each village in this region has one school and one community health center per village, which will be involved in supplement distribution and some outcome assessments. The villages will be broadly comparable in terms of size, affluence, rates of malnutrition, the presence or absence of a school meal program, and tribal affiliation and religion.