This document discusses nutrition and diet therapy. It defines nutrition as the science of food and nutrients and their role in maintaining homeostasis. Nutritional imbalance can impact health and disease. The six basic nutrients discussed are carbohydrates, proteins, fats, vitamins, minerals, and water. Carbohydrates, proteins and fats are broken down, absorbed and used to provide energy, build tissues, and regulate bodily functions. Maintaining a balanced intake of nutrients is important for overall health and nutritional status.