Recent advances in the field of food colloids (colloids and interfaces) have provided food scientists with novel means to rationally develop foods with desired ‘in-body’ functionalities mainly related to the promotion of good health. Specifically, both emulsions and hydrocolloids can be used to achieve these outcomes. A fundamental understanding of the physicochemical mechanism behind the formation, stability, and the properties of food colloids is required in order to establish a link between the dynamic nature of foods and the physiology of digestion.