Primary surgical indications for the esophagus and stomach mainly involve cancer surgeries. In recent years, significant progress has been made in the field of esogastric surgery, driven by advancements in surgical techniques and improvements in perioperative care. The rate of resectability has increased, and surgical strategies have evolved to encompass a broader patient population. However, despite a reduction in postoperative mortality and morbidity, malnutrition remains a significant challenge after surgery, leading to weight loss, muscle mass reduction, and deficiencies in essential nutrients due to digestive complications. Malnutrition worsens quality of life and increases the risk of tumor recurrence, significantly affecting prognosis. Nevertheless, the nutritional consequences following surgery are frequently overlooked, mainly due to a lack of awareness regarding their long-term effects on patients who have undergone digestive surgery, extending beyond six months. Micronutrient deficiencies are frequently observed following both partial and total gastrectomy, as anticipated. Surprisingly, these deficiencies appear to be similarly prevalent in patients who have undergone esophagectomy with iron, vitamins A, B1, B12, D, and E deficiencies commonly observed in up to 78.3% of the patients. Recognizing the distinct consequences associated with each type of intervention underscores the importance of implementing preventive measures, early detection, and prompt management.