From Prevention to Improvement: Impact of Rigorous Follow-Up on Post-Bariatric Nutritional and Metabolic Status

Nutritional deficiencies and metabolic alterations are common complications following bariatric surgery, requiring often lifelong monitoring and supplementation. The aim of this retrospective study is to investigate whether a structured follow-up can mitigate micronutrient deficiencies and metabolic changes. This study was conducted at Cannizaro Hospital (Catania, Italy), a national referral center accredited by SICOB (Italian Society for Bariatric and Metabolic Surgery). The cohort included patients who underwent bariatric surgery who completed one year follow-up between October 2022 and May 2024. Medical records such as anthropometric, clinical and laboratory data were collected for each patient at five different timepoints: baseline, 1-, 3-, 6- and 12-months post-surgery. Serum levels of iron, hemoglobin, vitamin D, folate, vitamin B12 and uric acid were analyzed to assess nutritional and metabolic status over time. One-year follow-up adherence of the patient cohort was equal to 97.5%. A significant increase in serum iron, vitamin D and folate levels was observed one year after surgery. Hemoglobin and vitamin B12 levels remained stable over time. Uric acid showed a significant rise at 1 month after surgery, followed by a progressive reduction by 12 months. This study highlights the importance of a structured follow-up program after bariatric surgery, contributing to the prevention of common postoperative complications.