Dietary genetics is the study of how an individual's genetic makeup influences their response to different foods and diets. This field examines how genes can affect metabolism, nutrient absorption, and food preferences, which can lead to variations in dietary needs among individuals. Research in dietary genetics aims to personalize nutrition by understanding these genetic factors. For example, certain genes may predispose individuals to be lactose intolerant or to metabolize caffeine differently. By identifying these genetic traits, nutritionists can create tailored dietary plans that optimize health and well-being for each person.