Iron Supplementation and Anemia After Sleeve Gastrectomy

The goal of this observational study is to learn if taking extra iron pills after weight loss surgery helps prevent low iron and anemia compared to just taking a standard multivitamin. The main question it aims to answer is: Does a specific iron supplementation plan lower the number of patients who develop iron deficiency anemia in the 6 months after sleeve gastrectomy surgery? Researchers will compare two groups of patients from different hospital units to see if the extra iron works: Patients from one unit who take a prophylactic iron supplement (Ferrodep, 60 mg per day) in addition to their standard multivitamin. Patients from another unit who take only a standard multivitamin (Centrum Silver). Participants in this study will: * Have their blood tested for iron and anemia levels before surgery, and again at 3 and 6 months after surgery, as part of their regular post-operative care. * Be asked about their health and quality of life during follow-up clinic visits. * Have their medical information from their hospital records reviewed by the study team to track their progress.