Cachexia is a complex metabolic syndrome characterized by unintended weight loss, muscle wasting, fatigue, and loss of appetite. It is commonly associated with chronic illnesses such as cancer, heart failure, and chronic kidney disease. Cachexia is a serious condition that can significantly impact a patient's quality of life and worsen their overall prognosis. Research in this area focuses on understanding the underlying mechanisms of cachexia, developing effective treatments to manage the symptoms, and improving outcomes for patients suffering from this condition.