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. 2022 Jan 17;7:11. doi: 10.1038/s41392-021-00831-w

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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 license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license 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 license, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 1 — The composition and metabolic effects of the ketogenic diet, which have increasingly generated interest. a The compositional features of the classic KD and its variants are shown. b The number of publications obtained for the search term “ketogenic diet” in PubMed is shown by the year of publication. Articles published before 1931 were not included due to the unavailability of PubMed records predating this timepoint