The “Ola Tuputupua’e” or Growing Up Study is a cohort study that began in 2015 with the recruitment of 305 mother-child pairs from 10 villages across the Samoan island of Upolu. Children were between two and four years of age in 2015 and have been followed at two-year intervals into adolescence with the goal of understanding how the household and school environments contribute to obesity risk throughout childhood. In each biannual wave of the study, participants provide physical measurements (height, weight, blood pressure) and a finger-stick blood sample for the detection of anemia.