Dear colleagues. We have released this eBook as the first installment of our "GUIDELINES' SUMMARY with GUIDED ANSWERED MCQS & STUDY HIGHLIGHTS" series, with a specific emphasis on the subject of "AMERICAN SOCIETY OF PARENTERAL & ENTERAL NUTRITION (ASPEN)". This publication was the outcome of a cooperative endeavour involving my proficient and passionate coauthors, specifically PharmDs Najd Khaled Alyasjeen, Islam Khatatbeh, and Rana Alqudah. This eBook release organizes each chapter into three to four sections: Questions, Recommendations, or practical guidelines with their rationales and discussions, MCQs with Guided Answers, and Study highlights. This eBook release includes 24 guidelines released by the American Society for Parenteral and Enteral Nutrition, spanning from 2009 to the currently ongoing guideline under review in 2024. These guidelines place particular emphasis on Safe Practices For Parenteral Nutrition, Nutrition Support Of Children With Human Immunodeficiency Virus Infection, Nutrition Support Therapy During Adult Anticancer Treatment And In Hematopoietic Cell Transplantation , Nutrition Support Of The Critically Ill Child , Nutrition Support Of Neonates Supported With Extracorporeal Membrane Oxygenation, Nutrition Support In Adult Acute And Chronic Renal Failure, Nutrition Support Of Hospitalized Pediatric Patients With Obesity, Nutrition Screening, Assessment, And Intervention In Adults, Nutrition Support Of Neonatal Patients At Risk For Necrotizing Enterocolitis, Hyperglycemia And Hypoglycemia In The Neonate Receiving Parenteral Nutrition part 1, Hyperglycemia And Hypoglycemia In The Neonate Receiving Parenteral Nutrition part 2, Nutrition Support Of Neonatal Patients At Risk For Metabolic Bone Disease, Nutrition Support Of Adult Patients With Hyperglycemia, Nutrition Support Of Hospitalized Adult Patients With Obesity, Support Of Pediatric Patients With Intestinal Failure At Risk Of Parenteral Nutrition–Associated Liver Disease, Parenteral Nutrition Ordering, Order Review, Compounding, Labeling, And Dispensing, Guidelines For The Provision And Assessment Of Nutrition Support Therapy In The Adult Critically Ill Patient, Nutrition Support of Adult Patients With Enterocutaneous Fistula, Guidelines For The Provision And Assessment Of Nutrition support Therapy In The Pediatric Critically Ill Patient, The Validity Of Body Composition Assessment In Clinical Populations, The Selection And Care Of Central Venous Access Devices For Adult Home Parenteral Nutrition Administration, Guidelines For The Provision Of Nutrition Support Therapy In The Adult Critically Ill Patient, Guidelines For Parenteral Nutrition In Preterm Infants, Aspen Nutrition Guidelines For Replacement Of A Balloon Gastrostomy Tube In Infants And Pediatric Patients: Protocol (Guidelines Under Development). Nevertheless, this eBook release includes a grand total of 1280 multiple-choice questions (MCQs) along with their corresponding guided answers. We primarily focus on medical, surgical, clinical pharmacy, and pharmacological specialists, as well as mentors, residents, and students.