This book presents the principles of medical nutrition therapy, along with numerous case examples, covering the nutrition of pregnant and breastfeeding women, infants aged 0–1 and healthy children, as well as malnutrition, obesity, gastroenteritis, malabsorption disorders, inborn errors of metabolism, enteral and parenteral nutrition, infectious diseases, food allergies, burns and wounds, anemia, autism, neurological diseases, intensive care patients, diabetes, kidney diseases, liver and heart diseases, and other conditions. It has been prepared by active academics and clinicians with clinical experience who closely follow scientific developments, with the aim of providing a resource that can guide future dietitians and students in the field of nutrition and dietetics throughout their professional careers.