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The prevalence of these nutritional disorders before BS is still debated. The aim of our study was to retrospectively evaluate the prevalence of micronutrient deficiencies in candidates for BS.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Methods<\/jats:title>\n                <jats:p>A prospectively maintained database of our institution was searched to find all patients who underwent surgery between January and December 2021. The following data were collected: age, gender, body mass index (BMI), obesity-associated diseases, and preoperative serum levels of vitamin B12, folate, and vitamin D.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Results<\/jats:title>\n                <jats:p>A total of 174 patients were included in our study. Mean age and BMI were 39.2\u2009\u00b1\u200911.4\u00a0years and 44.3\u2009\u00b1\u20097.1\u00a0kg\/m<jats:sup>2<\/jats:sup>, respectively. One hundred and thirty-nine patients (79.9%) had at least one preoperative micronutrient disorder, with vitamin D deficiency being the most common (116, 66.7%), followed by a deficit of folate (76, 43.7%) and vitamin B12 (10, 5.7%). Forty-seven (27%) individuals had insufficient levels of vitamin D. Comparison of deficiencies between sexes showed that vitamin B12\u2009&lt;\u200920\u00a0ng\/ml was significantly more frequent in women (<jats:italic>p<\/jats:italic>\u2009=\u20090.03). DLP showed a mild significant effect on folate levels (<jats:italic>p<\/jats:italic>\u2009=\u20090.01), while the association of HNT and T2DM had a mild significant effect on vitamin B12 (<jats:italic>p<\/jats:italic>\u2009=\u20090.02).<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Conclusions<\/jats:title>\n                <jats:p>Preoperative micronutrient deficiencies were frequently found in candidates for BS. Approximately 90% of patients had deficient or insufficient serum levels of vitamin D preoperatively. Almost half of the patients had a preoperative deficit of folate, and vitamin B12 deficiency was significantly more frequent in the female population. It is mandatory to screen all patients undergoing BS for vitamin deficiencies before surgery.<\/jats:p>\n              <\/jats:sec>","DOI":"10.1007\/s11695-022-06355-8","type":"journal-article","created":{"date-parts":[[2022,11,4]],"date-time":"2022-11-04T13:03:27Z","timestamp":1667567007000},"page":"212-218","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":21,"title":["Micronutrients Deficiencies in Candidates of Bariatric Surgery: Results from a Single Institution over a 1-Year Period"],"prefix":"10.1007","volume":"33","author":[{"given":"Giovanna","family":"Berardi","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1514-7112","authenticated-orcid":false,"given":"Antonio","family":"Vitiello","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Adam","family":"Abu-Abeid","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Vincenzo","family":"Schiavone","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Antonio","family":"Franzese","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Nunzio","family":"Velotti","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mario","family":"Musella","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2022,11,4]]},"reference":[{"key":"6355_CR1","doi-asserted-by":"publisher","first-page":"6e10","DOI":"10.1016\/j.metabol.2018.09.005","volume":"92","author":"YC Chooi","year":"2019","unstructured":"Chooi YC, Ding C, Magkos F. 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