A review will be carried out to assess the scope of the impact on nutritional science of the nutritional data collected in ALSPAC and the publications arising from it. It will look first at what ALSPAC shows about the impact of diet in pregnancy and early childhood, feeding practices, habits and choices on growth, obesity development, mental development and future diet. Secondly it will look at mid childhood and adolescent diet and how this may be associated with genetic make-up, infant diet and parental diet and how it relates to later outcomes such as fat and lean mass, growth trajectories and obesity development. The proposed review of this work would aim to synthesise the finding so far and identify gaps that can be filled by further interrogation of the data. It will also identify areas where other studies could fill the gaps or confirm or refute the findings. The end of the first 21 years of ALSPAC is a timely opportunity to take stock of the contribution of the ALSPAC nutrition project to knowledge about human nutrition. This review will clarify the importance of this project and identify where future research in ALSPAC should be targeted to ensure that the data already collected and any future data will be fully exploited to add to evidence-based nutrition recommendations.