Comparison of excess body weight loss and preoperative and postoperative vitamin and mineral status of patients which underwent sleeve gastrectomy operation in a private clinic

The aim of this study is to reveal preoperative micronutrient deficiencies, to investigate micronutrient status of the patients who underwent sleeve gastrectomy (SG) at postoperative 3rd and 12th months, to track micronutrient status of bariatric patients using multivitamin supplementation and to assess the correlation between percentage of excess body weight loss (EBWL%) and micronutrient status of the patients. This study is based on data collected from an obesity surgery clinic's routine follow-up program. 229 participants' preoperative and postoperative datas are evaluated. Pre- and postoperative anthropometric measurements and biochemical evaluation of certain micronutrients (iron, ferritin, vitamin B12, folic acid, total iron binding capacity (TIBC), hemoglobin, zinc, calcium, vitamin D, vitamin A, vitamin B1, biotin and copper). Although all participants supplemented with showed specific multivitamin and mineral twice a day after surgery, postoperative data analyses micronutrient deficiencies. EBWL% is calculated both for postop 3rd and 12th months. And the mean value of EBWL% at both 3rd and 12th months could be classified as successful regarding literature. The major deficiency detected both preoperatively and postoperatively was vitamin D deficiency (preop; 87%, postop 3rd m; 51%, postop 12th m; 51%). Ferritin, folic acid, vitamin B12, copper deficiencies and low serum hemoglobin were significant findings. Prevalence of postop biotin deficiency was unexpectedly high. Postop EBWL% and serum hemoglobin showed negative correlation. Micronutrient deficiencies after SG can be detected even with presence of multivitamin supplementation and monitorization micronutrient levels for detecting such micronutrient deficiency is very an important aspect of postop follow-up procedure.