المجلة الدولية للعلوم والتقنية

Obesity is one of the most prevalent global health challenges, contributing to numerous comorbidities. Sleeve gastrectomy is a prominent intervention for severe obesity; however, failure to adhere to postoperative nutritional supplementation and regular laboratory monitoring may lead to deficiencies in vitamins and minerals (e.g., vitamin D and calcium) and increase the risk of osteoporosis. This study evaluated the impact of Sleeve gastrectomy on serum vitamin D and calcium levels in 70 patients (15 males, 55 females) who underwent the procedure at least six months prior in Misrata, Libya. Blood tests were conducted preoperatively and six months postoperatively, alongside a structured questionnaire administered via face-to-face interviews. The results revealed statistically significant differences (p < 0.05) in mean serum levels of vitamin D (17.52 ng/mL preoperatively vs. 15.15 ng/mL postoperatively) and calcium (8.89 mg/dL preoperatively vs. 7.44 mg/dL postoperatively). These findings underscore the adverse effects of sleeve gastrectomy on vitamin D and calcium homeostasis, emphasizing the critical need for long-term adherence to micronutrient supplementation and routine biochemical surveillance to mitigate postoperative complications such as osteoporosis................. Keywords:............... Obesity, Sleeve gastrectomy, Vitamin D deficiency, Calcium deficiency.