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. 2023 Nov 3;67(1):52–61. doi: 10.1007/s00125-023-06029-9

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© The Author(s) 2023

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 1 — Time course of the plasma glucose concentration and GIR during the hyperinsulinaemic–euglycaemic clamp (a); the correlation between the change in serum magnesium concentration and the change in mean GIR (b); and the correlation between the change in serum magnesium concentration and the change in mean insulin sensitivity index (M/I) after magnesium supplementation compared with placebo (c). The grey area in (a) represents the last 30 min of the glucose clamp. Data are presented as mean ± SEM (n=14) (a) or individual values (b, c). BL, baseline