UNIT 1 Introduction to Nutrition Introduction to Nutrition. Definition of Nutrition Nutrition is the science of food and its relationship to health. It involves the intake, digestion, absorption, metabolism, and utilization of nutrients by the body for growth, maintenance, and overall well-being. Importance of Nutrition in Nursing In nursing, nutrition plays a vital role in promoting health, preventing diseases, and assisting in the recovery process. Proper nutrition is essential for