{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,20]],"date-time":"2026-08-20T18:56:15Z","timestamp":1787252175061,"version":"build-2736575974"},"reference-count":17,"publisher":"Wiley","license":[{"start":{"date-parts":[[2023,9,20]],"date-time":"2023-09-20T00:00:00Z","timestamp":1695168000000},"content-version":"unspecified","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100006162","name":"Funda\u00e7\u00e3o de Amparo \u00e0 Ci\u00eancia e Tecnologia do Estado de Pernambuco","doi-asserted-by":"publisher","award":["PPSUS-APQ-0400-4.05\/20"],"award-info":[{"award-number":["PPSUS-APQ-0400-4.05\/20"]}],"id":[{"id":"10.13039\/501100006162","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100002322","name":"Coordena\u00e7\u00e3o de Aperfei\u00e7oamento de Pessoal de N\u00edvel Superior","doi-asserted-by":"publisher","award":["PPSUS-APQ-0400-4.05\/20"],"award-info":[{"award-number":["PPSUS-APQ-0400-4.05\/20"]}],"id":[{"id":"10.13039\/501100002322","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Journal of Obesity"],"published-print":{"date-parts":[[2023,9,20]]},"abstract":"<jats:p>Introduction. Bariatric surgery causes physiological and anatomical changes in the gastrointestinal tract that interfere with intestinal absorption and, consequently, with the nutritional status, especially about vitamin D. The aim of the study was to evaluate the vitamin D levels and body composition of these patients in the Roux-en-Y gastric bypass (RYGB) and vertical sleeve gastrectomy (VSG) types of surgery. Methods. The retrospective cohort study included a population of 120 patients aged between 18 and 65\u2009years, with class II or III obesity, undergoing bariatric surgery procedures (VSG or RYGB-type). Data were collected on the degree of obesity, age, average time since surgery, and gender. The individuals underwent a complete physical examination, measuring blood pressure, weight, height, waist, and neck circumference. In addition to calculating the percentage of loss of body weight and assessing body fat, the food frequency and physical activity of these patients were evaluated. Blood was collected, and the insulin variables, hydroxyvitamin D (25OHD), were analyzed. Results. There was a significant difference between groups only for PTH, total BMD, and insulin variables. A significant intragroup difference was found in the variables\u2019 body mass index (BMI) and vitamin D for the vertical sleeve gastrectomy group and BMI for the RYGB group. Conclusion. The analysis between the groups of procedures, similarity in body composition and postsurgical vitamin D levels, with significant differences only for PTH, BMD, and insulin variables, demonstrates that both procedures are effective in reducing fat mass.<\/jats:p>","DOI":"10.1155\/2023\/4828052","type":"journal-article","created":{"date-parts":[[2023,9,21]],"date-time":"2023-09-21T00:05:07Z","timestamp":1695254707000},"page":"1-6","source":"Crossref","is-referenced-by-count":5,"title":["Vitamin D Concentration Changes after Bariatric Surgery"],"prefix":"10.1155","volume":"2023","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-2063-3174","authenticated-orcid":true,"given":"Vanessa","family":"Mayana Alves Baad","sequence":"first","affiliation":[{"name":"Faculty of Medical Sciences, University of Pernambuco, Recife, Pernambuco, Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5724-8096","authenticated-orcid":true,"given":"Narriane","family":"Chaves Pereira de Holanda","sequence":"additional","affiliation":[{"name":"Faculty of Medical Sciences, University of Pernambuco, Recife, Pernambuco, Brazil"},{"name":"Department of Endocrinology, Federal University of Paraiba, Jo\u00e3o Pessoa, Para\u00edba, Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5994-2164","authenticated-orcid":true,"given":"Juliana","family":"Fonseca Nogueira Alves","sequence":"additional","affiliation":[{"name":"Department of Nutrition, University of Pernambuco, Petrolina, Pernambuco, Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0290-0742","authenticated-orcid":true,"given":"Francisco","family":"Bandeira","sequence":"additional","affiliation":[{"name":"Faculty of Medical Sciences, University of Pernambuco, Recife, Pernambuco, Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9170-5684","authenticated-orcid":true,"given":"Ana","family":"C\u00e9lia Oliveira dos Santos","sequence":"additional","affiliation":[{"name":"Faculty of Medical Sciences, University of Pernambuco, Recife, Pernambuco, Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5109-3900","authenticated-orcid":true,"given":"Amanda","family":"Alves Marcelino da Silva","sequence":"additional","affiliation":[{"name":"Faculty of Medical Sciences, University of Pernambuco, Recife, Pernambuco, Brazil"},{"name":"Department of Nutrition, University of Pernambuco, Petrolina, Pernambuco, Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6498-5158","authenticated-orcid":true,"given":"Taisy","family":"Cinthia Ferro Cavalcante","sequence":"additional","affiliation":[{"name":"Faculty of Medical Sciences, University of Pernambuco, Recife, Pernambuco, Brazil"},{"name":"Department of Nutrition, University of Pernambuco, Petrolina, Pernambuco, Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","reference":[{"key":"1","first-page":"1","article-title":"Obesity: preventing and managing the global epidemic. 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