This document discusses nutritional management and nutrients. It defines a nutrient as a chemical substance in food that helps maintain the body. Major nutrients include vitamins, minerals, protein, carbohydrates, and water. Nutrients provide energy, help build cells and tissues, and regulate bodily processes. The document recommends eating a variety of foods daily to get needed nutrients, breastfeeding infants exclusively for six months and continuing for two years, eating more vegetables and fruits, and consuming fish, lean meat and dairy for growth and health. It also discusses variables that affect nutrient needs and having a healthy, balanced diet according to nutritional guidelines.