Building on our previous work linking diet and cognition, this project will examine diet and obesogenic environments, and their association with cognitive health in young and middle-aged adults, and cognitive impairment in older adults. Diet-cognition associations will be compared between countries (e.g. Ethnic Chinese in Australia, Hong Kong and China). The PATH and AusDiab datasets provide diet and cognitive data from young adulthood. Datasets will also be drawn from CAPA and COSMIC. The CRE will fund additional collection of data on lifetime diet in the PATH study.