Background: Microplastics (plastics ≤ 5 mm) are ubiquitous contaminants that may cause adverse human health effects [1]. However, information on human exposure to microplastics from terrestrial foods is lacking [2], including in eggs [3]. Objective: This work aims to compare the number and physical characteristics of microplastics present in eggs from cage and free-range production systems. Methods: Eggs identi...