The purpose of dietetary guidelines in public health is to provide science-based recommendations that promote healthy eating patterns and reduce the risk of chronic diseases. These guidelines aim to inform individuals about proper nutrition, including recommended daily servings of fruits, vegetables, and whole grains, while limiting added sugars, sodium, and saturated fats. By disseminating clear and accessible information, dietary guidelines serve as a framework for governments, healthcare providers, and educators to support community health initiatives, ultimately striving to improve nutritional habits and overall population well-being.