1. Preoperative nutritional deficiencies 2. Nutritional evaluation and calculation of nutritional requirements in the preoperative course 3. Preoperative diets: LCD, VLCD and commercial supplements 4. Impact of preoperative nutritional intervention on comorbidities: Type 2 diabetes, hypertension, dyslipidemia and NAFLD 5. Fluid therapy during bariatric surgery 6. Bariatric surgery options 7. Postoperative complications. Indications and access routes for enteral and parenteral nutrition 8. Nutritional treatment in the critically-ill complicated patient 9. Nutritional recommendations after restrictive procedures 10. Nutritional recommendations after mixed procedures 11. Nutritional recommendations after malabsorptive procedures 12. Postoperative vitamin and mineral supplementation 13. Special nutritional requirements in children and adolescents undergoing bariatric surgery 14. Special nutritional requirements in the elderly patient undergoing bariatric surgery 15. Special nutritional requirements in specific situations in women: Pregnanacy, lactancy and post-menopauseal status 16. Follow-up and screening of postoperative nutritional deficiencies 17. Postoperative management of specific complications: Anemia, protein malnutrition and neurological disorders 18. Cookbook for bariatric patients