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Furthermore, in patients with T2DM, hypomagnesemia is associated with worst glycaemic control. Bariatric surgery (BS) remains the most effective treatment in severe obesity and also provides resolution\/improvement of T2DM. Our aim is to evaluate the association between Mg supplementation post-BS and Mg serum levels with diabetes status after BS.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Methods<\/jats:title>\n                <jats:p>We performed an observational study on patients with obesity and T2DM who underwent BS. Data was assessed pre-BS and one-year post-BS.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Results<\/jats:title>\n                <jats:p>We included a total of 403 patients with T2DM. At baseline, 43.4% of the patients had Mg deficiency. Pre-BS, patients with Mg deficiency had poorer glycaemic control \u2013 HbA1c 7.2\u2009\u00b1\u20091.6% <jats:italic>vs<\/jats:italic> 6.4\u2009\u00b1\u20091.0% (<jats:italic>p<\/jats:italic>\u2009&lt;\u20090.001), fasting plasma glucose 146.2\u2009\u00b1\u200958.8\u00a0mg\/dL <jats:italic>vs<\/jats:italic> 117.5\u2009\u00b1\u200936.6\u00a0mg\/dL (<jats:italic>p<\/jats:italic>\u2009&lt;\u20090.001) and were under a greater number of anti-diabetic drugs 1.0 (IQR 0\u20132.0) <jats:italic>vs<\/jats:italic> 1.0 (IQR 0\u20131.0) (<jats:italic>p\u2009<\/jats:italic>=\u20090.002). These findings persisted at one-year post-BS. At the first-year post-BS, 58.4% of the patients had total remission of T2DM and 4.1% had partial remission. Patients without Mg deficiency at one-year post-BS had higher rates of total and partial remission. Higher serum Mg levels at baseline is an independent predictor of total T2DM remission (<jats:italic>p<\/jats:italic>\u2009&lt;\u20090.0001). The optimal cut-off of baseline Mg to predict total T2DM remission was 1.50\u00a0mg\/dL with a sensitivity of 73% and a specificity of 58% (area under ROC\u2009=\u20090.65). Patients that were under Mg supplementation post-BS had serum Mg values, glycaemic control and total remission of T2DM similar to patients non-supplemented.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Conclusion<\/jats:title>\n                <jats:p>In patients with T2DM submitted to BS, higher Mg serum levels at baseline and 1-year after BS were associated with better glycaemic control and higher rates of total T2DM remission at the first year post-BS.<\/jats:p>\n              <\/jats:sec>","DOI":"10.1186\/s12902-022-01210-4","type":"journal-article","created":{"date-parts":[[2022,12,5]],"date-time":"2022-12-05T21:03:24Z","timestamp":1670274204000},"update-policy":"http:\/\/dx.doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Higher magnesium levels are associated with better glycaemic control and diabetes remission post-bariatric surgery"],"prefix":"10.1186","volume":"22","author":[{"given":"Silva","family":"MM","sequence":"first","affiliation":[]},{"given":"Neves","family":"JS","sequence":"additional","affiliation":[]},{"given":"Borges-Canha","family":"M","sequence":"additional","affiliation":[]},{"given":"Mendes","family":"AP","sequence":"additional","affiliation":[]},{"given":"Fonseca","family":"MJ","sequence":"additional","affiliation":[]},{"given":"Mendon\u00e7a","family":"F","sequence":"additional","affiliation":[]},{"given":"Ferreira","family":"MJ","sequence":"additional","affiliation":[]},{"given":"Salazar","family":"D","sequence":"additional","affiliation":[]},{"given":"Pedro","family":"J","sequence":"additional","affiliation":[]},{"given":"Guerreiro","family":"V","sequence":"additional","affiliation":[]},{"given":"Lau","family":"E","sequence":"additional","affiliation":[]},{"given":"Varela","family":"A","sequence":"additional","affiliation":[]},{"given":"Freitas","family":"P","sequence":"additional","affiliation":[]},{"given":"Carvalho","family":"D","sequence":"additional","affiliation":[]},{"name":"CRIO group","sequence":"additional","affiliation":[]}],"member":"297","published-online":{"date-parts":[[2022,12,6]]},"reference":[{"key":"1210_CR1","doi-asserted-by":"publisher","first-page":"203","DOI":"10.1023\/A:1016058229972","volume":"15","author":"ME Maguire","year":"2002","unstructured":"Maguire ME, Cowan JA. 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