This document discusses nutrients and nutrition. It defines nutrients as chemical substances in food that help maintain the body by providing energy, helping build cells and tissues, and regulating bodily processes. It lists specific nutrients like vitamins, minerals, protein, carbohydrates, and water. It provides recommendations for a healthy diet and nutrition including eating a variety of foods, breastfeeding infants, eating more vegetables and fruits, consuming proteins, and limiting unhealthy foods. It discusses factors that can affect nutrients and aims for overall fitness and health through a healthy diet.