{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,1]],"date-time":"2026-10-01T23:28:00Z","timestamp":1790897280293,"version":"4.1.0"},"reference-count":28,"publisher":"MDPI AG","issue":"16","license":[{"start":{"date-parts":[[2022,8,13]],"date-time":"2022-08-13T00:00:00Z","timestamp":1660348800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Nutrients"],"abstract":"<jats:p>Background: Metabolic bariatric surgery (MBS) is the most effective treatment for severe obesity. Vitamin D deficiency is a common complication encountered both during preoperative workup and follow-up. Aim: To estimate the prevalence of vitamin D deficiency in patients undergoing MBS. Methods: Prospectively maintained database of our university MBS center was searched to assess the rate of preoperative and postoperative vitamin D deficiency or insufficiency in patients undergoing MBS over a one-year period. Results: In total, 184 patients were included, 85 cases of Sleeve Gastrectomy (SG), 99 Gastric Bypass (GB; 91 One Anastomosis and 8 Roux-en-Y). Preoperative vitamin D deficiency and insufficiency were respectively found in 61% and 29% of patients, with no significant difference between SG and GB. After six months, 15% of patients had vitamin D deficiency, and 34% had vitamin D insufficiency. There was no significant difference in the rate of vitamin D deficiency or insufficiency and the percentage of total weight loss (%TWL) at 1, 3, and 6 postoperative months between SG and GB. Conclusions: Preoperative vitamin D deficiency or insufficiency is common in MBS candidates. Regular follow-up with correct supplementation is recommended when undergoing MBS. Early postoperative values of vitamin D were comparable between SG and OAGB.<\/jats:p>","DOI":"10.3390\/nu14163319","type":"journal-article","created":{"date-parts":[[2022,8,15]],"date-time":"2022-08-15T03:33:20Z","timestamp":1660534400000},"page":"3319","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":22,"title":["Vitamin D Deficiency in Patients with Morbid Obesity before and after Metabolic Bariatric Surgery"],"prefix":"10.3390","volume":"14","author":[{"given":"Mario","family":"Musella","sequence":"first","affiliation":[{"name":"Advanced Biomedical Sciences Department, Naples Federico II University, AOU \u201cFederico II\u201d\u2013Via S.Pansini 5, 80131 Naples, Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Giovanna","family":"Berardi","sequence":"additional","affiliation":[{"name":"Advanced Biomedical Sciences Department, Naples Federico II University, AOU \u201cFederico II\u201d\u2013Via S.Pansini 5, 80131 Naples, Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1514-7112","authenticated-orcid":false,"given":"Antonio","family":"Vitiello","sequence":"additional","affiliation":[{"name":"Advanced Biomedical Sciences Department, Naples Federico II University, AOU \u201cFederico II\u201d\u2013Via S.Pansini 5, 80131 Naples, Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Danit","family":"Dayan","sequence":"additional","affiliation":[{"name":"Division of General Surgery, Tel Aviv Sourasky Medical Center, 6 Weizman Street, 64230906, Affiliated to Sackler Faculty of Medicine, Tel Aviv University, 64230906 Tel Aviv, Israel"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0533-5833","authenticated-orcid":false,"given":"Vincenzo","family":"Schiavone","sequence":"additional","affiliation":[{"name":"Advanced Biomedical Sciences Department, Naples Federico II University, AOU \u201cFederico II\u201d\u2013Via S.Pansini 5, 80131 Naples, Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9060-5406","authenticated-orcid":false,"given":"Antonio","family":"Franzese","sequence":"additional","affiliation":[{"name":"Advanced Biomedical Sciences Department, Naples Federico II University, AOU \u201cFederico II\u201d\u2013Via S.Pansini 5, 80131 Naples, Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4607-3462","authenticated-orcid":false,"given":"Adam","family":"Abu-Abeid","sequence":"additional","affiliation":[{"name":"Division of General Surgery, Tel Aviv Sourasky Medical Center, 6 Weizman Street, 64230906, Affiliated to Sackler Faculty of Medicine, Tel Aviv University, 64230906 Tel Aviv, Israel"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2022,8,13]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"161","DOI":"10.21037\/atm.2017.03.107","article-title":"Morbidity and mortality associated with obesity","volume":"5","author":"Abdelaal","year":"2017","journal-title":"Ann. 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